Claude Code transcript - page 6/12

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

   400→        assert result == 20  # 10 * 2
   401→
   402→class TestTryFinallyBreak:
   403→    """Test that finally blocks execute before break/continue/return."""
   404→
   405→    def test_break_in_try_finally(self):
   406→        """Break inside try should run finally block first."""
   407→        ctx = JSContext()
   408→        result = ctx.eval('''
   409→            var s = '';
   410→            for(;;) {
   411→                try {
   412→                    s += 't';
   413→                    break;
   414→                } finally {
   415→                    s += 'f';
   416→                }
   417→            }
   418→            s
   419→        ''')
   420→        assert result == "tf"
   421→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/tests/test_vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   398→            obj.value
   399→        ''')
   400→        assert result == 20  # 10 * 2
   401→
   402→class TestTryFinallyBreak:
   403→    """Test that finally blocks execute before break/continue/return."""
   404→
   405→    def test_break_in_try_finally(self):
   406→        """Break inside try should run finally block first."""
   407→        ctx = JSContext()
   408→        result = ctx.eval('''
   409→            var s = '';
   410→            for(;;) {
   411→                try {
   412→                    s += 't';
   413→                    break;
   414→                } finally {
   415→                    s += 'f';
   416→                }
   417→            }
   418→            s
   419→        ''')
   420→        assert result == "tf"
   421→
   422→
   423→class TestLabeledStatements:
   424→    """Test labeled statements."""
   425→
   426→    def test_labeled_break_after_while(self):
   427→        """Labeled break after while without braces."""
   428→        ctx = JSContext()
   429→        # Should not hang - breaks immediately
   430→        result = ctx.eval("var x = 0; while (1) label: break; x")
   431→        assert result == 0
   432→
   433→    def test_labeled_break_in_block(self):
   434→        """Labeled break in block."""
   435→        ctx = JSContext()
   436→        result = ctx.eval("var x = 0; label: { x = 1; break label; x = 2; } x")
   437→        assert result == 1
   438→

18:    SwitchStatement, SwitchCase, LabeledStatement,
165:        # Check for labeled statement: IDENTIFIER COLON statement
167:            # Look ahead for colon to detect labeled statement
172:                return LabeledStatement(Identifier(label_token.value), body)

6-    Node, Program, NumericLiteral, StringLiteral, BooleanLiteral, NullLiteral,
7-    RegexLiteral, Identifier, ThisExpression, ArrayExpression, ObjectExpression, Property,
8-    UnaryExpression, UpdateExpression, BinaryExpression, LogicalExpression,
9-    ConditionalExpression, AssignmentExpression, SequenceExpression,
10-    MemberExpression, CallExpression, NewExpression,
11-    ExpressionStatement, BlockStatement, EmptyStatement,
12-    VariableDeclaration, VariableDeclarator,
13-    IfStatement, WhileStatement, DoWhileStatement, ForStatement,
14-    ForInStatement, ForOfStatement, BreakStatement, ContinueStatement,
15-    ReturnStatement, ThrowStatement, TryStatement, CatchClause,
16:    SwitchStatement, SwitchCase, LabeledStatement,
17-    FunctionDeclaration, FunctionExpression, ArrowFunctionExpression,
18-)
19-from .opcodes import OpCode
20-from .values import UNDEFINED
21-
22-
23-@dataclass
24-class CompiledFunction:
25-    """A compiled function."""
26-    name: str
--
211-            elif isinstance(node, TryStatement):
212-                visit(node.block)
213-                if node.handler:
214-                    visit(node.handler.body)
215-                if node.finalizer:
216-                    visit(node.finalizer)
217-            elif isinstance(node, SwitchStatement):
218-                for case in node.cases:
219-                    for stmt in case.consequent:
220-                        visit(stmt)
221:            elif isinstance(node, LabeledStatement):
222-                visit(node.body)
223-            elif hasattr(node, '__dict__'):
224-                # For expression nodes (e.g., arrow function expression body)
225-                for value in node.__dict__.values():
226-                    if isinstance(value, Node):
227-                        visit(value)
228-                    elif isinstance(value, list):
229-                        for item in value:
230-                            if isinstance(item, Node):
231-                                visit(item)
--
727-                    # Regular local
728-                    self._add_local(name)
729-                    slot = self._get_local(name)
730-                    self._emit(OpCode.STORE_LOCAL, slot)
731-            else:
732-                # At program level: use global variable
733-                idx = self._add_name(name)
734-                self._emit(OpCode.STORE_NAME, idx)
735-            self._emit(OpCode.POP)
736-
737:        elif isinstance(node, LabeledStatement):
738-            # Create a loop context for the label
739-            loop_ctx = LoopContext(label=node.label.name)
740-            self.loop_stack.append(loop_ctx)
741-
742-            # Compile the labeled body
743-            self._compile_statement(node.body)
744-
745-            # Patch break jumps that target this label
746-            for pos in loop_ctx.break_jumps:
747-                self._patch_jump(pos)

   735→            self._emit(OpCode.POP)
   736→
   737→        elif isinstance(node, LabeledStatement):
   738→            # Create a loop context for the label
   739→            loop_ctx = LoopContext(label=node.label.name)
   740→            self.loop_stack.append(loop_ctx)
   741→
   742→            # Compile the labeled body
   743→            self._compile_statement(node.body)
   744→
   745→            # Patch break jumps that target this label
   746→            for pos in loop_ctx.break_jumps:
   747→                self._patch_jump(pos)
   748→
   749→            self.loop_stack.pop()
   750→
   751→        else:
   752→            raise NotImplementedError(f"Cannot compile statement: {type(node).__name__}")
   753→
   754→    def _compile_statement_for_value(self, node: Node) -> None:
   755→        """Compile a statement leaving its completion value on the stack.
   756→
   757→        This is used for eval semantics where the last statement's value is returned.
   758→        """
   759→        if isinstance(node, ExpressionStatement):
   760→            # Expression statement: value is the expression's value
   761→            self._compile_expression(node.expression)
   762→
   763→        elif isinstance(node, BlockStatement):
   764→            # Block statement: value is the last statement's value

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/compiler.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   733→                idx = self._add_name(name)
   734→                self._emit(OpCode.STORE_NAME, idx)
   735→            self._emit(OpCode.POP)
   736→
   737→        elif isinstance(node, LabeledStatement):
   738→            # Create a loop context for the label
   739→            # is_loop=False so unlabeled break/continue skip this context
   740→            loop_ctx = LoopContext(label=node.label.name, is_loop=False)
   741→            self.loop_stack.append(loop_ctx)
   742→
   743→            # Compile the labeled body
   744→            self._compile_statement(node.body)
   745→

   555→                self._patch_jump(pos)
   556→            for pos in loop_ctx.continue_jumps:
   557→                self._patch_jump(pos, loop_start)
   558→
   559→            self.loop_stack.pop()
   560→
   561→        elif isinstance(node, BreakStatement):
   562→            if not self.loop_stack:
   563→                raise SyntaxError("'break' outside of loop")
   564→
   565→            # Find the right loop context (labeled or innermost)
   566→            target_label = node.label.name if node.label else None
   567→            ctx = None
   568→            for loop_ctx in reversed(self.loop_stack):
   569→                if target_label is None or loop_ctx.label == target_label:
   570→                    ctx = loop_ctx
   571→                    break
   572→
   573→            if ctx is None:
   574→                raise SyntaxError(f"label '{target_label}' not found")
   575→
   576→            # Emit pending finally blocks before the break
   577→            self._emit_pending_finally_blocks()
   578→
   579→            pos = self._emit_jump(OpCode.JUMP)
   580→            ctx.break_jumps.append(pos)
   581→
   582→        elif isinstance(node, ContinueStatement):
   583→            if not self.loop_stack:
   584→                raise SyntaxError("'continue' outside of loop")

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/compiler.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   557→                self._patch_jump(pos, loop_start)
   558→
   559→            self.loop_stack.pop()
   560→
   561→        elif isinstance(node, BreakStatement):
   562→            if not self.loop_stack:
   563→                raise SyntaxError("'break' outside of loop")
   564→
   565→            # Find the right loop context (labeled or innermost loop/switch)
   566→            target_label = node.label.name if node.label else None
   567→            ctx = None
   568→            for loop_ctx in reversed(self.loop_stack):
   569→                if target_label is not None:
   570→                    # Labeled break - find the matching label
   571→                    if loop_ctx.label == target_label:
   572→                        ctx = loop_ctx
   573→                        break
   574→                else:
   575→                    # Unlabeled break - find innermost loop or switch (is_loop=True)
   576→                    if loop_ctx.is_loop:
   577→                        ctx = loop_ctx
   578→                        break
   579→
   580→            if ctx is None:
   581→                if target_label:
   582→                    raise SyntaxError(f"label '{target_label}' not found")
   583→                else:
   584→                    raise SyntaxError("'break' outside of loop")
   585→
   586→            # Emit pending finally blocks before the break
   587→            self._emit_pending_finally_blocks()
   588→

============================= test session starts ==============================
platform linux -- Python 3.11.14, pytest-9.0.2, pluggy-1.6.0 -- /home/user/mquickjs-python/.venv/bin/python
cachedir: .pytest_cache
rootdir: /home/user/mquickjs-python
configfile: pyproject.toml
collecting ... collected 2 items

tests/test_vm.py::TestLabeledStatements::test_labeled_break_after_while PASSED [ 50%]
tests/test_vm.py::TestLabeledStatements::test_labeled_break_in_block PASSED [100%]

============================== 2 passed in 0.07s ===============================

    self._execute_opcode(op, arg, frame)
src/mquickjs_python/vm.py:514: in _execute_opcode
    self._throw(exc)
src/mquickjs_python/vm.py:1652: in _throw
    raise JSError(to_string(msg) if msg else "Error")
E   mquickjs_python.errors.JSError: Error: assertion failed: got |false|, expected |true|
=========================== short test summary info ============================
FAILED tests/test_js_basic.py::test_basic_js[test_loop_switch.js-path8] - mqu...
!!!!!!!!!!!!!!!!!!!!!!!!!! stopping after 1 failures !!!!!!!!!!!!!!!!!!!!!!!!!!!
========================= 1 failed, 78 passed in 0.64s =========================

     1→function assert(actual, expected, message) {
     2→    if (arguments.length == 1)
     3→        expected = true;
     4→
     5→    if (actual === expected)
     6→        return;
     7→
     8→    if (actual !== null && expected !== null
     9→    &&  typeof actual == 'object' && typeof expected == 'object'
    10→    &&  actual.toString() === expected.toString())
    11→        return;
    12→
    13→    throw Error("assertion failed: got |" + actual + "|" +
    14→                ", expected |" + expected + "|" +
    15→                (message ? " (" + message + ")" : ""));
    16→}
    17→
    18→function test_switch1()
    19→{
    20→    var i, a, s;
    21→    s = "";
    22→    for(i = 0; i < 3; i++) {
    23→        a = "?";
    24→        switch(i) {
    25→        case 0:
    26→            a = "a";
    27→            break;
    28→        case 1:
    29→            a = "b";
    30→            break;
    31→        default:
    32→            a = "c";
    33→            break;
    34→        }
    35→        s += a;
    36→    }
    37→    assert(s === "abc" && i === 3);
    38→}
    39→
    40→test_switch1();
    41→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

11-    ExpressionStatement, BlockStatement, EmptyStatement,
12-    VariableDeclaration, VariableDeclarator,
13-    IfStatement, WhileStatement, DoWhileStatement, ForStatement,
14-    ForInStatement, ForOfStatement, BreakStatement, ContinueStatement,
15-    ReturnStatement, ThrowStatement, TryStatement, CatchClause,
16:    SwitchStatement, SwitchCase, LabeledStatement,
17-    FunctionDeclaration, FunctionExpression, ArrowFunctionExpression,
18-)
19-from .opcodes import OpCode
20-from .values import UNDEFINED
21-
--
212-                visit(node.block)
213-                if node.handler:
214-                    visit(node.handler.body)
215-                if node.finalizer:
216-                    visit(node.finalizer)
217:            elif isinstance(node, SwitchStatement):
218-                for case in node.cases:
219-                    for stmt in case.consequent:
220-                        visit(stmt)
221-            elif isinstance(node, LabeledStatement):
222-                visit(node.body)
--
668-            # Normal finally block (after try completes normally or after catch)
669-            self._patch_jump(jump_to_finally)
670-            if node.finalizer:
671-                self._compile_statement(node.finalizer)
672-
673:        elif isinstance(node, SwitchStatement):
674-            self._compile_expression(node.discriminant)
675-
676-            jump_to_body: List[Tuple[int, int]] = []
677-            default_jump = None
678-

   673→        elif isinstance(node, SwitchStatement):
   674→            self._compile_expression(node.discriminant)
   675→
   676→            jump_to_body: List[Tuple[int, int]] = []
   677→            default_jump = None
   678→
   679→            # Compile case tests
   680→            for i, case in enumerate(node.cases):
   681→                if case.test:
   682→                    self._emit(OpCode.DUP)
   683→                    self._compile_expression(case.test)
   684→                    self._emit(OpCode.SEQ)
   685→                    pos = self._emit_jump(OpCode.JUMP_IF_TRUE)
   686→                    jump_to_body.append((pos, i))
   687→                else:
   688→                    default_jump = (self._emit_jump(OpCode.JUMP), i)
   689→
   690→            # Jump to end if no match
   691→            jump_end = self._emit_jump(OpCode.JUMP)
   692→
   693→            # Case bodies
   694→            case_positions = []
   695→            loop_ctx = LoopContext(is_loop=False)  # For break statements only
   696→            self.loop_stack.append(loop_ctx)
   697→
   698→            for i, case in enumerate(node.cases):
   699→                case_positions.append(len(self.bytecode))
   700→                for stmt in case.consequent:
   701→                    self._compile_statement(stmt)
   702→
   703→            self._patch_jump(jump_end)
   704→            self._emit(OpCode.POP)  # Pop discriminant
   705→
   706→            # Patch jumps to case bodies
   707→            for pos, idx in jump_to_body:
   708→                self._patch_jump(pos, case_positions[idx])
   709→            if default_jump:
   710→                pos, idx = default_jump
   711→                self._patch_jump(pos, case_positions[idx])
   712→
   713→            # Patch break jumps
   714→            for pos in loop_ctx.break_jumps:
   715→                self._patch_jump(pos)
   716→
   717→            self.loop_stack.pop()
   718→
   719→        elif isinstance(node, FunctionDeclaration):
   720→            # Compile function
   721→            func = self._compile_function(node.id.name, node.params, node.body)
   722→            func_idx = len(self.functions)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/compiler.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   557→                self._patch_jump(pos, loop_start)
   558→
   559→            self.loop_stack.pop()
   560→
   561→        elif isinstance(node, BreakStatement):
   562→            if not self.loop_stack:
   563→                raise SyntaxError("'break' outside of loop")
   564→
   565→            # Find the right loop context (labeled or innermost loop/switch)
   566→            target_label = node.label.name if node.label else None
   567→            ctx = None
   568→            for loop_ctx in reversed(self.loop_stack):
   569→                if target_label is not None:
   570→                    # Labeled break - find the matching label
   571→                    if loop_ctx.label == target_label:
   572→                        ctx = loop_ctx
   573→                        break
   574→                else:
   575→                    # Unlabeled break - find innermost loop or switch
   576→                    # is_loop=True means it's a loop, is_loop=False with no label means switch
   577→                    # Skip labeled statements (is_loop=False with label) for unlabeled break
   578→                    if loop_ctx.is_loop or loop_ctx.label is None:
   579→                        ctx = loop_ctx
   580→                        break
   581→
   582→            if ctx is None:
   583→                if target_label:
   584→                    raise SyntaxError(f"label '{target_label}' not found")
   585→                else:
   586→                    raise SyntaxError("'break' outside of loop")
   587→
   588→            # Emit pending finally blocks before the break
   589→            self._emit_pending_finally_blocks()
   590→

..                                                                       [ 43%]
tests/test_parser.py ................................................... [ 56%]
........                                                                 [ 58%]
tests/test_regex.py .................................................... [ 71%]
....................................                                     [ 80%]
tests/test_string_regex.py ...................                           [ 85%]
tests/test_vm.py ....................................................... [ 99%]
.                                                                        [100%]

======================== 385 passed, 5 xfailed in 4.63s ========================

2 files changed, 36 insertions(+), 6 deletions(-)

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file /home/user/mquickjs-python/tests/test_vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   419→        ''')
   420→        assert result == "tf"
   421→
   422→
   423→class TestLabeledStatements:
   424→    """Test labeled statements."""
   425→
   426→    def test_labeled_break_after_while(self):
   427→        """Labeled break after while without braces."""
   428→        ctx = JSContext()
   429→        # Should not hang - breaks immediately
   430→        result = ctx.eval("var x = 0; while (1) label: break; x")
   431→        assert result == 0
   432→
   433→    def test_labeled_break_in_block(self):
   434→        """Labeled break in block."""
   435→        ctx = JSContext()
   436→        result = ctx.eval("var x = 0; label: { x = 1; break label; x = 2; } x")
   437→        assert result == 1
   438→
   439→
   440→class TestBuiltinConstructors:
   441→    """Test built-in constructors like new Object(), new Array()."""
   442→
   443→    def test_new_object(self):
   444→        """new Object() creates empty object."""
   445→        ctx = JSContext()
   446→        result = ctx.eval("var o = new Object(); o.x = 1; o.x")
   447→        assert result == 1
   448→
   449→    def test_new_array(self):
   450→        """new Array() creates array."""
   451→        ctx = JSContext()
   452→        result = ctx.eval("new Array(3).length")
   453→        assert result == 3
   454→
   455→    def test_new_array_with_elements(self):
   456→        """new Array(1, 2, 3) creates array with elements."""
   457→        ctx = JSContext()
   458→        result = ctx.eval("var a = new Array(1, 2, 3); a[1]")
   459→        assert result == 2
   460→

38-        console = JSObject()
39-        console.set("log", self._console_log)
40-        self._globals["console"] = console
41-
42-        # Infinity and NaN
43-        self._globals["Infinity"] = float("inf")
44-        self._globals["NaN"] = float("nan")
45-        self._globals["undefined"] = UNDEFINED
46-
47-        # Basic type constructors (minimal implementations)
48:        self._globals["Object"] = self._create_object_constructor()
49-        self._globals["Array"] = self._array_constructor
50-        self._globals["Error"] = self._error_constructor
51-
52-        # Math object
53-        self._globals["Math"] = self._create_math_object()
54-
55-        # JSON object
56-        self._globals["JSON"] = self._create_json_object()
57-
58-        # Number constructor and methods
--
73-        # Global number functions
74-        self._globals["isNaN"] = self._global_isnan
75-        self._globals["isFinite"] = self._global_isfinite
76-        self._globals["parseInt"] = self._global_parseint
77-        self._globals["parseFloat"] = self._global_parsefloat
78-
79-    def _console_log(self, *args: JSValue) -> None:
80-        """Console.log implementation."""
81-        print(" ".join(to_string(arg) for arg in args))
82-
83:    def _create_object_constructor(self) -> JSObject:
84-        """Create the Object constructor with static methods."""
85-        # Create a callable object that acts as constructor
86-        obj_constructor = JSObject()
87-
88-        def keys_fn(*args):
89-            obj = args[0] if args else UNDEFINED
90-            if not isinstance(obj, JSObject):
91-                return JSArray()
92-            arr = JSArray()
93-            arr._elements = list(obj.keys())

    83→    def _create_object_constructor(self) -> JSObject:
    84→        """Create the Object constructor with static methods."""
    85→        # Create a callable object that acts as constructor
    86→        obj_constructor = JSObject()
    87→
    88→        def keys_fn(*args):
    89→            obj = args[0] if args else UNDEFINED
    90→            if not isinstance(obj, JSObject):
    91→                return JSArray()
    92→            arr = JSArray()
    93→            arr._elements = list(obj.keys())
    94→            return arr
    95→
    96→        def values_fn(*args):
    97→            obj = args[0] if args else UNDEFINED
    98→            if not isinstance(obj, JSObject):
    99→                return JSArray()
   100→            arr = JSArray()
   101→            arr._elements = [obj.get(k) for k in obj.keys()]
   102→            return arr
   103→
   104→        def entries_fn(*args):
   105→            obj = args[0] if args else UNDEFINED
   106→            if not isinstance(obj, JSObject):
   107→                return JSArray()
   108→            arr = JSArray()
   109→            arr._elements = []
   110→            for k in obj.keys():
   111→                entry = JSArray()
   112→                entry._elements = [k, obj.get(k)]
   113→                arr._elements.append(entry)
   114→            return arr
   115→
   116→        def assign_fn(*args):
   117→            if not args:
   118→                return JSObject()
   119→            target = args[0]
   120→            if not isinstance(target, JSObject):
   121→                return target
   122→            for i in range(1, len(args)):
   123→                source = args[i]
   124→                if isinstance(source, JSObject):
   125→                    for k in source.keys():
   126→                        target.set(k, source.get(k))
   127→            return target
   128→
   129→        obj_constructor.set("keys", keys_fn)
   130→        obj_constructor.set("values", values_fn)
   131→        obj_constructor.set("entries", entries_fn)
   132→        obj_constructor.set("assign", assign_fn)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

  1610→    def _new_object(self, arg_count: int) -> None:
  1611→        """Create a new object with constructor."""
  1612→        args = []
  1613→        for _ in range(arg_count):
  1614→            args.insert(0, self.stack.pop())
  1615→        constructor = self.stack.pop()
  1616→
  1617→        if isinstance(constructor, JSFunction):
  1618→            # Create new object
  1619→            obj = JSObject()
  1620→            # Call constructor with new object as 'this'
  1621→            self._invoke_js_function(constructor, args, obj)
  1622→            # Result is the new object (or returned value if object)
  1623→            self.stack.append(obj)
  1624→        elif isinstance(constructor, JSObject) and hasattr(constructor, '_callable'):
  1625→            # Built-in constructor (like RegExp)
  1626→            result = constructor._callable(*args)
  1627→            self.stack.append(result)
  1628→        else:
  1629→            raise JSTypeError(f"{constructor} is not a constructor")
  1630→
  1631→    def _throw(self, exc: JSValue) -> None:
  1632→        """Throw an exception."""
  1633→        if self.exception_handlers:
  1634→            frame_idx, catch_ip = self.exception_handlers.pop()
  1635→
  1636→            # Unwind call stack
  1637→            while len(self.call_stack) > frame_idx + 1:
  1638→                self.call_stack.pop()
  1639→
  1640→            # Jump to catch handler
  1641→            frame = self.call_stack[-1]
  1642→            frame.ip = catch_ip
  1643→
  1644→            # Push exception value
  1645→            self.stack.append(exc)
  1646→        else:
  1647→            # Uncaught exception
  1648→            if isinstance(exc, str):
  1649→                raise JSError(exc)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

   238→
   239→class JSCallableObject(JSObject):
   240→    """JavaScript object that is also callable (for constructors like Number, String, Boolean)."""
   241→
   242→    def __init__(self, call_fn, prototype: Optional["JSObject"] = None):
   243→        super().__init__(prototype)
   244→        self._call_fn = call_fn
   245→
   246→    def __call__(self, *args):
   247→        return self._call_fn(*args)
   248→
   249→    def __repr__(self) -> str:
   250→        return f"JSCallableObject({self._properties})"
   251→
   252→
   253→class JSArray(JSObject):
   254→    """JavaScript array."""
   255→
   256→    def __init__(self, length: int = 0):
   257→        super().__init__()

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

  1620→            # Call constructor with new object as 'this'
  1621→            self._invoke_js_function(constructor, args, obj)
  1622→            # Result is the new object (or returned value if object)
  1623→            self.stack.append(obj)
  1624→        elif isinstance(constructor, JSObject) and hasattr(constructor, '_callable'):
  1625→            # Built-in constructor (like RegExp)
  1626→            result = constructor._callable(*args)
  1627→            self.stack.append(result)
  1628→        else:
  1629→            raise JSTypeError(f"{constructor} is not a constructor")
  1630→
  1631→    def _throw(self, exc: JSValue) -> None:
  1632→        """Throw an exception."""
  1633→        if self.exception_handlers:
  1634→            frame_idx, catch_ip = self.exception_handlers.pop()

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1620→            # Call constructor with new object as 'this'
  1621→            self._invoke_js_function(constructor, args, obj)
  1622→            # Result is the new object (or returned value if object)
  1623→            self.stack.append(obj)
  1624→        elif isinstance(constructor, JSObject) and hasattr(constructor, '_call_fn'):
  1625→            # Built-in constructor (like Object, Array, RegExp)
  1626→            result = constructor._call_fn(*args)
  1627→            self.stack.append(result)
  1628→        else:
  1629→            raise JSTypeError(f"{constructor} is not a constructor")
  1630→
  1631→    def _throw(self, exc: JSValue) -> None:

     1→"""JavaScript execution context."""
     2→
     3→import json
     4→import math
     5→import random
     6→import time
     7→from typing import Any, Dict, Optional
     8→
     9→from .parser import Parser
    10→from .compiler import Compiler
    11→from .vm import VM
    12→from .values import UNDEFINED, NULL, JSValue, JSObject, JSCallableObject, JSArray, JSRegExp, to_string, to_number
    13→from .errors import JSError, MemoryLimitError, TimeLimitError
    14→
    15→
    16→class JSContext:
    17→    """JavaScript execution context with configurable limits."""
    18→
    19→    def __init__(
    20→        self,
    21→        memory_limit: Optional[int] = None,
    22→        time_limit: Optional[float] = None,
    23→    ):
    24→        """Create a new JavaScript context.
    25→
    26→        Args:
    27→            memory_limit: Maximum memory usage in bytes (approximate)
    28→            time_limit: Maximum execution time in seconds
    29→        """
    30→        self.memory_limit = memory_limit

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

    83→    def _create_object_constructor(self) -> JSObject:
    84→        """Create the Object constructor with static methods."""
    85→        # Create a callable object that acts as constructor
    86→        obj_constructor = JSObject()
    87→
    88→        def keys_fn(*args):
    89→            obj = args[0] if args else UNDEFINED
    90→            if not isinstance(obj, JSObject):
    91→                return JSArray()
    92→            arr = JSArray()
    93→            arr._elements = list(obj.keys())
    94→            return arr
    95→
    96→        def values_fn(*args):
    97→            obj = args[0] if args else UNDEFINED
    98→            if not isinstance(obj, JSObject):
    99→                return JSArray()
   100→            arr = JSArray()
   101→            arr._elements = [obj.get(k) for k in obj.keys()]
   102→            return arr
   103→
   104→        def entries_fn(*args):
   105→            obj = args[0] if args else UNDEFINED
   106→            if not isinstance(obj, JSObject):
   107→                return JSArray()
   108→            arr = JSArray()
   109→            arr._elements = []
   110→            for k in obj.keys():
   111→                entry = JSArray()
   112→                entry._elements = [k, obj.get(k)]
   113→                arr._elements.append(entry)
   114→            return arr
   115→
   116→        def assign_fn(*args):
   117→            if not args:
   118→                return JSObject()
   119→            target = args[0]
   120→            if not isinstance(target, JSObject):
   121→                return target
   122→            for i in range(1, len(args)):
   123→                source = args[i]
   124→                if isinstance(source, JSObject):
   125→                    for k in source.keys():
   126→                        target.set(k, source.get(k))
   127→            return target
   128→
   129→        obj_constructor.set("keys", keys_fn)
   130→        obj_constructor.set("values", values_fn)
   131→        obj_constructor.set("entries", entries_fn)
   132→        obj_constructor.set("assign", assign_fn)
   133→
   134→        return obj_constructor
   135→
   136→    def _array_constructor(self, *args: JSValue) -> JSArray:
   137→        """Array constructor."""
   138→        if len(args) == 1 and isinstance(args[0], (int, float)):
   139→            return JSArray(int(args[0]))
   140→        arr = JSArray()
   141→        for arg in args:
   142→            arr.push(arg)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/context.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    79→    def _console_log(self, *args: JSValue) -> None:
    80→        """Console.log implementation."""
    81→        print(" ".join(to_string(arg) for arg in args))
    82→
    83→    def _create_object_constructor(self) -> JSCallableObject:
    84→        """Create the Object constructor with static methods."""
    85→        # Constructor function - new Object() creates empty object
    86→        def object_constructor(*args):
    87→            return JSObject()
    88→
    89→        # Create a callable object that acts as constructor
    90→        obj_constructor = JSCallableObject(object_constructor)
    91→
    92→        def keys_fn(*args):
    93→            obj = args[0] if args else UNDEFINED
    94→            if not isinstance(obj, JSObject):
    95→                return JSArray()
    96→            arr = JSArray()

============================= test session starts ==============================
platform linux -- Python 3.11.14, pytest-9.0.2, pluggy-1.6.0 -- /home/user/mquickjs-python/.venv/bin/python
cachedir: .pytest_cache
rootdir: /home/user/mquickjs-python
configfile: pyproject.toml
collecting ... collected 3 items

tests/test_vm.py::TestBuiltinConstructors::test_new_object PASSED        [ 33%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array FAILED         [ 66%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array_with_elements FAILED [100%]

=================================== FAILURES ===================================
____________________ TestBuiltinConstructors.test_new_array ____________________

self = <test_vm.TestBuiltinConstructors object at 0x7ece6d856b50>

    def test_new_array(self):
        """new Array() creates array."""
        ctx = JSContext()
>       result = ctx.eval("new Array(3).length")
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/test_vm.py:452: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
src/mquickjs_python/context.py:607: in eval
    result = vm.run(compiled)
             ^^^^^^^^^^^^^^^^
src/mquickjs_python/vm.py:106: in run
    return self._execute()
           ^^^^^^^^^^^^^^^
src/mquickjs_python/vm.py:163: in _execute
    self._execute_opcode(op, arg, frame)
src/mquickjs_python/vm.py:506: in _execute_opcode
    self._new_object(arg)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <mquickjs_python.vm.VM object at 0x7ece6d8da610>, arg_count = 1

    def _new_object(self, arg_count: int) -> None:
        """Create a new object with constructor."""
        args = []
        for _ in range(arg_count):
            args.insert(0, self.stack.pop())
        constructor = self.stack.pop()
    
        if isinstance(constructor, JSFunction):
            # Create new object
            obj = JSObject()
            # Call constructor with new object as 'this'
            self._invoke_js_function(constructor, args, obj)

No files found

src/mquickjs_python/context.py:49:        self._globals["Array"] = self._array_constructor

49:        self._globals["Array"] = self._array_constructor
140:    def _array_constructor(self, *args: JSValue) -> JSArray:

   140→    def _array_constructor(self, *args: JSValue) -> JSArray:
   141→        """Array constructor."""
   142→        if len(args) == 1 and isinstance(args[0], (int, float)):
   143→            return JSArray(int(args[0]))
   144→        arr = JSArray()
   145→        for arg in args:
   146→            arr.push(arg)
   147→        return arr
   148→
   149→    def _error_constructor(self, message: JSValue = UNDEFINED) -> JSObject:
   150→        """Error constructor."""
   151→        err = JSObject()
   152→        err.set("message", to_string(message) if message is not UNDEFINED else "")
   153→        err.set("name", "Error")
   154→        return err
   155→
   156→    def _create_math_object(self) -> JSObject:
   157→        """Create the Math global object."""
   158→        math_obj = JSObject()
   159→
   160→        # Constants
   161→        math_obj.set("PI", math.pi)
   162→        math_obj.set("E", math.e)
   163→        math_obj.set("LN2", math.log(2))
   164→        math_obj.set("LN10", math.log(10))
   165→        math_obj.set("LOG2E", 1 / math.log(2))
   166→        math_obj.set("LOG10E", 1 / math.log(10))
   167→        math_obj.set("SQRT2", math.sqrt(2))
   168→        math_obj.set("SQRT1_2", math.sqrt(0.5))
   169→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

48:        self._globals["Object"] = self._create_object_constructor()
49-        self._globals["Array"] = self._array_constructor
50-        self._globals["Error"] = self._error_constructor
51-
52-        # Math object
53-        self._globals["Math"] = self._create_math_object()
54-
55-        # JSON object
56-        self._globals["JSON"] = self._create_json_object()
57-
58-        # Number constructor and methods
59-        self._globals["Number"] = self._create_number_constructor()
60-
61-        # String constructor and methods
62-        self._globals["String"] = self._create_string_constructor()
63-
64-        # Boolean constructor
65-        self._globals["Boolean"] = self._create_boolean_constructor()
66-
67-        # Date constructor
68-        self._globals["Date"] = self._create_date_constructor()
69-
70-        # RegExp constructor
71-        self._globals["RegExp"] = self._create_regexp_constructor()
72-
73-        # Global number functions
74-        self._globals["isNaN"] = self._global_isnan
75-        self._globals["isFinite"] = self._global_isfinite
76-        self._globals["parseInt"] = self._global_parseint
77-        self._globals["parseFloat"] = self._global_parsefloat
78-
79-    def _console_log(self, *args: JSValue) -> None:
80-        """Console.log implementation."""
81-        print(" ".join(to_string(arg) for arg in args))
82-
83:    def _create_object_constructor(self) -> JSCallableObject:
84-        """Create the Object constructor with static methods."""
85-        # Constructor function - new Object() creates empty object
86-        def object_constructor(*args):
87-            return JSObject()
88-
89-        # Create a callable object that acts as constructor
90-        obj_constructor = JSCallableObject(object_constructor)
91-
92-        def keys_fn(*args):
93-            obj = args[0] if args else UNDEFINED
94-            if not isinstance(obj, JSObject):
95-                return JSArray()
96-            arr = JSArray()
97-            arr._elements = list(obj.keys())
98-            return arr
99-
100-        def values_fn(*args):
101-            obj = args[0] if args else UNDEFINED
102-            if not isinstance(obj, JSObject):
103-                return JSArray()
104-            arr = JSArray()
105-            arr._elements = [obj.get(k) for k in obj.keys()]
106-            return arr
107-
108-        def entries_fn(*args):
109-            obj = args[0] if args else UNDEFINED
110-            if not isinstance(obj, JSObject):
111-                return JSArray()
112-            arr = JSArray()
113-            arr._elements = []
114-            for k in obj.keys():
115-                entry = JSArray()
116-                entry._elements = [k, obj.get(k)]
117-                arr._elements.append(entry)
118-            return arr
119-
120-        def assign_fn(*args):
121-            if not args:
122-                return JSObject()
123-            target = args[0]

    48→        self._globals["Object"] = self._create_object_constructor()
    49→        self._globals["Array"] = self._array_constructor
    50→        self._globals["Error"] = self._error_constructor
    51→
    52→        # Math object
    53→        self._globals["Math"] = self._create_math_object()
    54→
    55→        # JSON object
    56→        self._globals["JSON"] = self._create_json_object()
    57→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

     1→"""JavaScript execution context."""
     2→
     3→import json
     4→import math
     5→import random
     6→import time
     7→from typing import Any, Dict, Optional
     8→
     9→from .parser import Parser
    10→from .compiler import Compiler
    11→from .vm import VM
    12→from .values import UNDEFINED, NULL, JSValue, JSObject, JSCallableObject, JSArray, JSRegExp, to_string, to_number
    13→from .errors import JSError, MemoryLimitError, TimeLimitError
    14→
    15→
    16→class JSContext:
    17→    """JavaScript execution context with configurable limits."""
    18→
    19→    def __init__(
    20→        self,

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/context.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    45→        self._globals["undefined"] = UNDEFINED
    46→
    47→        # Basic type constructors (minimal implementations)
    48→        self._globals["Object"] = self._create_object_constructor()
    49→        self._globals["Array"] = self._create_array_constructor()
    50→        self._globals["Error"] = self._error_constructor
    51→
    52→        # Math object
    53→        self._globals["Math"] = self._create_math_object()

The file /home/user/mquickjs-python/src/mquickjs_python/context.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   136→        obj_constructor.set("assign", assign_fn)
   137→
   138→        return obj_constructor
   139→
   140→    def _create_array_constructor(self) -> JSCallableObject:
   141→        """Create the Array constructor with static methods."""
   142→        def array_constructor(*args):
   143→            if len(args) == 1 and isinstance(args[0], (int, float)):
   144→                return JSArray(int(args[0]))
   145→            arr = JSArray()
   146→            for arg in args:
   147→                arr.push(arg)
   148→            return arr
   149→
   150→        arr_constructor = JSCallableObject(array_constructor)
   151→
   152→        # Array.isArray()
   153→        def is_array(*args):
   154→            obj = args[0] if args else UNDEFINED
   155→            return isinstance(obj, JSArray)
   156→
   157→        arr_constructor.set("isArray", is_array)
   158→
   159→        return arr_constructor
   160→
   161→    def _error_constructor(self, message: JSValue = UNDEFINED) -> JSObject:
   162→        """Error constructor."""
   163→        err = JSObject()

============================= test session starts ==============================
platform linux -- Python 3.11.14, pytest-9.0.2, pluggy-1.6.0 -- /home/user/mquickjs-python/.venv/bin/python
cachedir: .pytest_cache
rootdir: /home/user/mquickjs-python
configfile: pyproject.toml
collecting ... collected 3 items

tests/test_vm.py::TestBuiltinConstructors::test_new_object PASSED        [ 33%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array PASSED         [ 66%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array_with_elements PASSED [100%]

============================== 3 passed in 0.07s ===============================

    raise JSTypeError(f"{constructor} is not a constructor")
E   mquickjs_python.errors.JSTypeError: TypeError: JSObject({}) is not a constructor
___________________ TestRegExpPatterns.test_character_class ____________________
tests/test_jscontext_regexp.py:161: in test_character_class
    result = ctx.eval('new RegExp("[a-z]+").test("hello")')
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
src/mquickjs_python/context.py:619: in eval
    result = vm.run(compiled)
             ^^^^^^^^^^^^^^^^
src/mquickjs_python/vm.py:106: in run
    return self._execute()
           ^^^^^^^^^^^^^^^
src/mquickjs_python/vm.py:163: in _execute
    self._execute_opcode(op, arg, frame)
src/mquickjs_python/vm.py:506: in _execute_opcode
    self._new_object(arg)
src/mquickjs_python/vm.py:1629: in _new_object
    raise JSTypeError(f"{constructor} is not a constructor")
E   mquickjs_python.errors.JSTypeError: TypeError: JSObject({}) is not a constructor
=========================== short test summary info ============================
FAILED tests/test_js_basic.py::test_basic_js[test_regexp.js-path15] - mquickj...
FAILED tests/test_jscontext_regexp.py::TestRegExpConstructor::test_new_regexp_basic
FAILED tests/test_jscontext_regexp.py::TestRegExpConstructor::test_new_regexp_flags
FAILED tests/test_jscontext_regexp.py::TestRegExpConstructor::test_regexp_global_flag
FAILED tests/test_jscontext_regexp.py::TestRegExpConstructor::test_regexp_ignorecase_flag
FAILED tests/test_jscontext_regexp.py::TestRegExpTest::test_simple_match - mq...
FAILED tests/test_jscontext_regexp.py::TestRegExpTest::test_no_match - mquick...
FAILED tests/test_jscontext_regexp.py::TestRegExpTest::test_case_insensitive_match
FAILED tests/test_jscontext_regexp.py::TestRegExpTest::test_digit_pattern - m...
FAILED tests/test_jscontext_regexp.py::TestRegExpExec::test_exec_match - mqui...
FAILED tests/test_jscontext_regexp.py::TestRegExpExec::test_exec_group - mqui...
FAILED tests/test_jscontext_regexp.py::TestRegExpExec::test_exec_no_match - m...
FAILED tests/test_jscontext_regexp.py::TestRegExpExec::test_exec_index - mqui...
FAILED tests/test_jscontext_regexp.py::TestRegExpGlobal::test_global_exec_advances
FAILED tests/test_jscontext_regexp.py::TestRegExpGlobal::test_lastindex_property
FAILED tests/test_jscontext_regexp.py::TestRegExpPatterns::test_word_boundary
FAILED tests/test_jscontext_regexp.py::TestRegExpPatterns::test_anchors - mqu...
FAILED tests/test_jscontext_regexp.py::TestRegExpPatterns::test_quantifiers
FAILED tests/test_jscontext_regexp.py::TestRegExpPatterns::test_character_class
================== 19 failed, 369 passed, 5 xfailed in 6.23s ===================

71:        self._globals["RegExp"] = self._create_regexp_constructor()
72-
73-        # Global number functions
74-        self._globals["isNaN"] = self._global_isnan
75-        self._globals["isFinite"] = self._global_isfinite
76-        self._globals["parseInt"] = self._global_parseint
77-        self._globals["parseFloat"] = self._global_parsefloat
78-
79-    def _console_log(self, *args: JSValue) -> None:
80-        """Console.log implementation."""
81-        print(" ".join(to_string(arg) for arg in args))
82-
83-    def _create_object_constructor(self) -> JSCallableObject:
84-        """Create the Object constructor with static methods."""
85-        # Constructor function - new Object() creates empty object
86-        def object_constructor(*args):
87-            return JSObject()
88-
89-        # Create a callable object that acts as constructor
90-        obj_constructor = JSCallableObject(object_constructor)
91-
92-        def keys_fn(*args):
93-            obj = args[0] if args else UNDEFINED
94-            if not isinstance(obj, JSObject):
95-                return JSArray()
96-            arr = JSArray()
97-            arr._elements = list(obj.keys())
98-            return arr
99-
100-        def values_fn(*args):
101-            obj = args[0] if args else UNDEFINED
--
499:    def _create_regexp_constructor(self) -> JSObject:
500-        """Create the RegExp constructor."""
501-        # The constructor is a callable that creates JSRegExp objects
502-        # This is wrapped in JSObject but the VM will call it specially
503-
504-        def regexp_constructor_fn(*args):
505-            pattern = to_string(args[0]) if args else ""
506-            flags = to_string(args[1]) if len(args) > 1 else ""
507-            return JSRegExp(pattern, flags)
508-
509-        # Return a callable marker
510-        regexp_constructor = JSObject()
511-        regexp_constructor._callable = regexp_constructor_fn
512-        return regexp_constructor
513-
514-    def _global_isnan(self, *args) -> bool:
515-        """Global isNaN - converts argument to number first."""
516-        x = to_number(args[0]) if args else float('nan')
517-        return math.isnan(x)
518-
519-    def _global_isfinite(self, *args) -> bool:
520-        """Global isFinite - converts argument to number first."""
521-        x = to_number(args[0]) if args else float('nan')
522-        return not (math.isnan(x) or math.isinf(x))
523-
524-    def _global_parseint(self, *args):
525-        """Global parseInt."""
526-        s = to_string(args[0]) if args else ""
527-        radix = int(to_number(args[1])) if len(args) > 1 else 10
528-        if radix == 0:
529-            radix = 10

The file /home/user/mquickjs-python/src/mquickjs_python/context.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   495→        date_constructor.set("now", now_fn)
   496→
   497→        return date_constructor
   498→
   499→    def _create_regexp_constructor(self) -> JSCallableObject:
   500→        """Create the RegExp constructor."""
   501→        def regexp_constructor_fn(*args):
   502→            pattern = to_string(args[0]) if args else ""
   503→            flags = to_string(args[1]) if len(args) > 1 else ""
   504→            return JSRegExp(pattern, flags)
   505→
   506→        return JSCallableObject(regexp_constructor_fn)
   507→
   508→    def _global_isnan(self, *args) -> bool:
   509→        """Global isNaN - converts argument to number first."""
   510→        x = to_number(args[0]) if args else float('nan')

50:        self._globals["Error"] = self._error_constructor
51-
52-        # Math object
53-        self._globals["Math"] = self._create_math_object()
54-
55-        # JSON object
56-        self._globals["JSON"] = self._create_json_object()
57-
58-        # Number constructor and methods
59-        self._globals["Number"] = self._create_number_constructor()
60-
--
161:    def _error_constructor(self, message: JSValue = UNDEFINED) -> JSObject:
162-        """Error constructor."""
163-        err = JSObject()
164-        err.set("message", to_string(message) if message is not UNDEFINED else "")
165-        err.set("name", "Error")
166-        return err
167-
168-    def _create_math_object(self) -> JSObject:
169-        """Create the Math global object."""
170-        math_obj = JSObject()
171-

============================= test session starts ==============================
platform linux -- Python 3.11.14, pytest-9.0.2, pluggy-1.6.0 -- /home/user/mquickjs-python/.venv/bin/python
cachedir: .pytest_cache
rootdir: /home/user/mquickjs-python
configfile: pyproject.toml
collecting ... collected 18 items

tests/test_jscontext_regexp.py::TestRegExpConstructor::test_new_regexp_basic PASSED [  5%]
tests/test_jscontext_regexp.py::TestRegExpConstructor::test_new_regexp_flags PASSED [ 11%]
tests/test_jscontext_regexp.py::TestRegExpConstructor::test_regexp_global_flag PASSED [ 16%]
tests/test_jscontext_regexp.py::TestRegExpConstructor::test_regexp_ignorecase_flag PASSED [ 22%]
tests/test_jscontext_regexp.py::TestRegExpTest::test_simple_match PASSED [ 27%]
tests/test_jscontext_regexp.py::TestRegExpTest::test_no_match PASSED     [ 33%]
tests/test_jscontext_regexp.py::TestRegExpTest::test_case_insensitive_match PASSED [ 38%]
tests/test_jscontext_regexp.py::TestRegExpTest::test_digit_pattern PASSED [ 44%]
tests/test_jscontext_regexp.py::TestRegExpExec::test_exec_match PASSED   [ 50%]
tests/test_jscontext_regexp.py::TestRegExpExec::test_exec_group PASSED   [ 55%]
tests/test_jscontext_regexp.py::TestRegExpExec::test_exec_no_match PASSED [ 61%]
tests/test_jscontext_regexp.py::TestRegExpExec::test_exec_index PASSED   [ 66%]
tests/test_jscontext_regexp.py::TestRegExpGlobal::test_global_exec_advances PASSED [ 72%]
tests/test_jscontext_regexp.py::TestRegExpGlobal::test_lastindex_property PASSED [ 77%]
tests/test_jscontext_regexp.py::TestRegExpPatterns::test_word_boundary PASSED [ 83%]
tests/test_jscontext_regexp.py::TestRegExpPatterns::test_anchors PASSED  [ 88%]
tests/test_jscontext_regexp.py::TestRegExpPatterns::test_quantifiers PASSED [ 94%]
tests/test_jscontext_regexp.py::TestRegExpPatterns::test_character_class PASSED [100%]

============================== 18 passed in 0.10s ==============================

tests/test_vm.py::TestStrings::test_string_concatenation PASSED          [ 95%]
tests/test_vm.py::TestStrings::test_string_length PASSED                 [ 95%]
tests/test_vm.py::TestGlobalAccess::test_set_global PASSED               [ 96%]
tests/test_vm.py::TestGlobalAccess::test_get_global PASSED               [ 96%]
tests/test_vm.py::TestVoidOperator::test_void_returns_undefined PASSED   [ 96%]
tests/test_vm.py::TestVoidOperator::test_void_expression PASSED          [ 96%]
tests/test_vm.py::TestVoidOperator::test_void_function_call PASSED       [ 97%]
tests/test_vm.py::TestForOf::test_for_of_array PASSED                    [ 97%]
tests/test_vm.py::TestForOf::test_for_of_string PASSED                   [ 97%]
tests/test_vm.py::TestGetterSetter::test_getter PASSED                   [ 97%]
tests/test_vm.py::TestGetterSetter::test_setter PASSED                   [ 98%]
tests/test_vm.py::TestGetterSetter::test_getter_setter_combined PASSED   [ 98%]
tests/test_vm.py::TestTryFinallyBreak::test_break_in_try_finally PASSED  [ 98%]
tests/test_vm.py::TestLabeledStatements::test_labeled_break_after_while PASSED [ 98%]
tests/test_vm.py::TestLabeledStatements::test_labeled_break_in_block PASSED [ 99%]
tests/test_vm.py::TestBuiltinConstructors::test_new_object PASSED        [ 99%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array PASSED         [ 99%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array_with_elements PASSED [100%]

======================== 388 passed, 5 xfailed in 4.58s ========================

 src/mquickjs_python/context.py | 48 +++++++++++++++++++++++++-----------------
 src/mquickjs_python/vm.py      |  6 +++---
 tests/test_vm.py               | 22 +++++++++++++++++++
 3 files changed, 54 insertions(+), 22 deletions(-)

672fe03 Fix labeled statement break/continue semantics
2c07659 Implement regex lookbehind assertions
27601f3 Organize passing mquickjs tests into tests/compat/ directory
f3cd9d9 Move passing test files to tests/basic/ directory
6cf3a86 Fix try-finally interaction with break/continue/return and exceptions

3 files changed, 54 insertions(+), 22 deletions(-)

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

tests/test_js_basic.py::test_basic_js[01_empty.js-path0] PASSED          [  3%]
tests/test_js_basic.py::test_basic_js[test_array_methods.js-path1] PASSED [  7%]
tests/test_js_basic.py::test_basic_js[test_for_in2.js-path2] PASSED      [ 11%]
tests/test_js_basic.py::test_basic_js[test_for_in_array.js-path3] PASSED [ 15%]
tests/test_js_basic.py::test_basic_js[test_for_in_simple.js-path4] PASSED [ 19%]
tests/test_js_basic.py::test_basic_js[test_json.js-path5] PASSED         [ 23%]
tests/test_js_basic.py::test_basic_js[test_loop_break.js-path6] PASSED   [ 26%]
tests/test_js_basic.py::test_basic_js[test_loop_for.js-path7] PASSED     [ 30%]
tests/test_js_basic.py::test_basic_js[test_loop_switch.js-path8] PASSED  [ 34%]
tests/test_js_basic.py::test_basic_js[test_loop_switch2.js-path9] PASSED [ 38%]
tests/test_js_basic.py::test_basic_js[test_loop_try5.js-path10] PASSED   [ 42%]
tests/test_js_basic.py::test_basic_js[test_loop_while.js-path11] PASSED  [ 46%]
tests/test_js_basic.py::test_basic_js[test_math.js-path12] PASSED        [ 50%]
tests/test_js_basic.py::test_basic_js[test_number_date.js-path13] PASSED [ 53%]
tests/test_js_basic.py::test_basic_js[test_object_methods.js-path14] PASSED [ 57%]
tests/test_js_basic.py::test_basic_js[test_regexp.js-path15] PASSED      [ 61%]
tests/test_js_basic.py::test_basic_js[test_string_methods.js-path16] PASSED [ 65%]
tests/test_js_basic.py::test_basic_js[test_try_catch.js-path17] PASSED   [ 69%]
tests/test_js_basic.py::test_basic_js[test_try_catch_simple.js-path18] PASSED [ 73%]
tests/test_js_basic.py::test_compat_js[test_closure.js-path0] PASSED     [ 76%]

tests/test_js_basic.py::test_mquickjs_js[mandelbrot.js-path0] XFAIL      [ 84%]
tests/test_js_basic.py::test_mquickjs_js[microbench.js-path1] XFAIL      [ 88%]
tests/test_js_basic.py::test_mquickjs_js[test_builtin.js-path2] XFAIL    [ 92%]
tests/test_js_basic.py::test_mquickjs_js[test_language.js-path3] XFAIL   [ 96%]
tests/test_js_basic.py::test_mquickjs_js[test_rect.js-path4] XFAIL (...) [100%]
======================== 21 passed, 5 xfailed in 2.91s =========================

============================= test session starts ==============================
platform linux -- Python 3.11.14, pytest-9.0.2, pluggy-1.6.0 -- /home/user/mquickjs-python/.venv/bin/python
cachedir: .pytest_cache
rootdir: /home/user/mquickjs-python
configfile: pyproject.toml
collecting ... collected 5 items / 4 deselected / 1 selected

tests/test_js_basic.py::test_mquickjs_js[test_language.js-path3] XFAIL   [100%]

======================= 4 deselected, 1 xfailed in 0.38s =======================

FAILED: [Errno 2] No such file or directory: 'tests/mquickjs_compat/test_language.js'

/home/user/mquickjs-python/tests/test_language.js

FAILED: JSSyntaxError: SyntaxError: Unexpected token: RBRACE

   270→
   271→    a = {x: 1, y: 2, __proto__: { z: 3 }};
   272→    assert(a.x, 1);
   273→    assert(a.y, 2);
   274→    assert(Object.getPrototypeOf(a).z, 3);
   275→
   276→    /* getter/setter/method */
   277→    b = 2;
   278→    a = {get x() { return b; }, set x(v) { b = v; }, f(v) { return v + 1 },
   279→         set: 10, get: 11 };
   280→    assert(a.x, 2);
   281→    a.x = 3;
   282→    assert(a.x, 3);
   283→    assert(a.f(3), 4);
   284→    assert(a.set, 10);
   285→    assert(a.get, 11);
   286→
   287→    a = { set() { return 1; }, get() { return 2; }}
   288→    assert(a.set(), 1);
   289→    assert(a.get(), 2);
   290→}
   291→
   292→function test_prototype()
   293→{
   294→    function f() { }
   295→    assert(f.prototype.constructor, f, "prototype");
   296→}
   297→
   298→function test_arguments()
   299→{
   300→    function f2() {
   301→        assert(arguments.length, 2, "arguments");
   302→        assert(arguments[0], 1, "arguments");
   303→        assert(arguments[1], 3, "arguments");
   304→    }
   305→    f2(1, 3);
   306→}
   307→
   308→function test_to_primitive()
   309→{

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

SUCCESS

Error around lines 1-20: SyntaxError: Expected '}'
1: function throw_error(msg) {
2:     throw Error(msg);
3: }
4: 
5: function assert(actual, expected, message) {
6:     function get_full_type(o) {
7:         var type = typeof(o);
8:         if (type === 'object') {
9:             if (o === null)
10:                 return 'null';
11:             if (o.constructor && o.constructor.name)
12:                 return o.constructor.name;
13:         }
14:         return type;
15:     }
16: 
17:     if (arguments.length == 1)
18:         expected = true;
19: 
20:     if (typeof actual === typeof expected) {

Error: JSError: Error: test

SUCCESS

Error near position 0-98
Context:
function throw_error(msg) {
    throw Error(msg);
}

function assert(actual, expected, message) {
    function get_full_type(o) {
        var type = typeof(o);
        if (type === 'object') {

    expr = self._parse_binary_expression(0, exclude_in)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/mquickjs-python/src/mquickjs_python/parser.py", line 558, in _parse_binary_expression
    left = self._parse_unary_expression()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/mquickjs-python/src/mquickjs_python/parser.py", line 657, in _parse_unary_expression
    argument = self._parse_unary_expression()
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/mquickjs-python/src/mquickjs_python/parser.py", line 660, in _parse_unary_expression
    return self._parse_postfix_expression()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/mquickjs-python/src/mquickjs_python/parser.py", line 664, in _parse_postfix_expression
    expr = self._parse_new_expression()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/mquickjs-python/src/mquickjs_python/parser.py", line 708, in _parse_new_expression
    return self._parse_primary_expression()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/mquickjs-python/src/mquickjs_python/parser.py", line 769, in _parse_primary_expression
    raise self._error(f"Unexpected token: {self.current.type.name}")
mquickjs_python.errors.JSSyntaxError: SyntaxError: Unexpected token: RBRACE

   318→function test_labels()
   319→{
   320→    do x: { break x; } while(0);
   321→    if (1)
   322→        x: { break x; }
   323→    else
   324→        x: { break x; }
   325→    while (0) x: { break x; };
   326→}
   327→
   328→function test_labels2()
   329→{
   330→    while (1) label: break
   331→    var i = 0
   332→    while (i < 3) label: {
   333→        if (i > 0)
   334→            break
   335→        i++
   336→    }
   337→    assert(i == 1)
   338→    for (;;) label: break
   339→    for (i = 0; i < 3; i++) label: {
   340→        if (i > 0)
   341→            break
   342→    }
   343→    assert(i == 1)
   344→}
   345→
   346→test_op1();
   347→test_cvt();

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

SUCCESS

Error: JSSyntaxError: SyntaxError: Unexpected token: RBRACE

SUCCESS

Error: JSSyntaxError: SyntaxError: Unexpected token: RBRACE

SUCCESS

Error: JSSyntaxError: SyntaxError: Unexpected token: RBRACE

Command running in background with ID: 1306aa

{"message":"Successfully killed shell: 1306aa (uv run python -c \"\nfrom mquickjs_python import JSContext\nctx = JSContext()\ntry:\n    ctx.eval('''\nwhile (true) label: {\n    var x = 1\n}\n''')\n    print('SUCCESS')\nexcept Exception as e:\n    print(f'Error: {type(e).__name__}: {e}')\n\" 2>&1)","shell_id":"1306aa"}

SUCCESS

SUCCESS

Error: JSSyntaxError: SyntaxError: Unexpected token: RBRACE

SUCCESS

SUCCESS

Error: JSSyntaxError: SyntaxError: Unexpected token: RBRACE

Error: JSReferenceError: ReferenceError: i is not defined

Error: SyntaxError: 'break' outside of loop

145:            return self._parse_break_statement()
146-
147-        if self._match(TokenType.CONTINUE):
148-            return self._parse_continue_statement()
149-
150-        if self._match(TokenType.RETURN):
151-            return self._parse_return_statement()
152-
153-        if self._match(TokenType.THROW):
154-            return self._parse_throw_statement()
155-
156-        if self._match(TokenType.TRY):
157-            return self._parse_try_statement()
158-
159-        if self._match(TokenType.SWITCH):
160-            return self._parse_switch_statement()
161-
162-        if self._match(TokenType.FUNCTION):
163-            return self._parse_function_declaration()
164-
165-        # Check for labeled statement: IDENTIFIER COLON statement
--
304:    def _parse_break_statement(self) -> BreakStatement:
305-        """Parse break statement."""
306-        label = None
307-        if self._check(TokenType.IDENTIFIER):
308-            label = Identifier(self._advance().value)
309-        self._consume_semicolon()
310-        return BreakStatement(label)
311-
312-    def _parse_continue_statement(self) -> ContinueStatement:
313-        """Parse continue statement."""
314-        label = None
315-        if self._check(TokenType.IDENTIFIER):
316-            label = Identifier(self._advance().value)
317-        self._consume_semicolon()
318-        return ContinueStatement(label)
319-
320-    def _parse_return_statement(self) -> ReturnStatement:
321-        """Parse return statement."""
322-        argument = None
323-        if not self._check(TokenType.SEMICOLON) and not self._check(TokenType.RBRACE):
324-            argument = self._parse_expression()

202:        self._consume_semicolon()
203-        return VariableDeclaration(declarations)
204-
205-    def _parse_if_statement(self) -> IfStatement:
206-        """Parse if statement: if (test) consequent else alternate"""
207-        self._expect(TokenType.LPAREN, "Expected '(' after 'if'")
208-        test = self._parse_expression()
209-        self._expect(TokenType.RPAREN, "Expected ')' after condition")
210-        consequent = self._parse_statement()
211-        alternate = None
212-        if self._match(TokenType.ELSE):
213-            alternate = self._parse_statement()
214-        return IfStatement(test, consequent, alternate)
215-
216-    def _parse_while_statement(self) -> WhileStatement:
217-        """Parse while statement: while (test) body"""
--
231:        self._consume_semicolon()
232-        return DoWhileStatement(body, test)
233-
234-    def _parse_for_statement(self) -> Node:
235-        """Parse for/for-in/for-of statement."""
236-        self._expect(TokenType.LPAREN, "Expected '(' after 'for'")
237-
238-        # Parse init part
239-        init = None
240-        if self._match(TokenType.SEMICOLON):
241-            pass  # No init
242-        elif self._match(TokenType.VAR):
243-            # Could be for or for-in
244-            name = self._expect(TokenType.IDENTIFIER, "Expected variable name")
245-            if self._match(TokenType.IN):
246-                # for (var x in obj)
--
309:        self._consume_semicolon()
310-        return BreakStatement(label)
311-
312-    def _parse_continue_statement(self) -> ContinueStatement:
313-        """Parse continue statement."""
314-        label = None
315-        if self._check(TokenType.IDENTIFIER):
316-            label = Identifier(self._advance().value)
317:        self._consume_semicolon()
318-        return ContinueStatement(label)
319-
320-    def _parse_return_statement(self) -> ReturnStatement:
321-        """Parse return statement."""
322-        argument = None
323-        if not self._check(TokenType.SEMICOLON) and not self._check(TokenType.RBRACE):
324-            argument = self._parse_expression()
325:        self._consume_semicolon()
326-        return ReturnStatement(argument)
327-
328-    def _parse_throw_statement(self) -> ThrowStatement:
329-        """Parse throw statement."""
330-        argument = self._parse_expression()
331:        self._consume_semicolon()
332-        return ThrowStatement(argument)
333-
334-    def _parse_try_statement(self) -> TryStatement:
335-        """Parse try statement."""
336-        block = self._parse_block_statement()
337-        handler = None
338-        finalizer = None
339-
340-        if self._match(TokenType.CATCH):
341-            self._expect(TokenType.LPAREN, "Expected '(' after 'catch'")
342-            param = self._expect(TokenType.IDENTIFIER, "Expected catch parameter")
343-            self._expect(TokenType.RPAREN, "Expected ')' after catch parameter")
344-            catch_body = self._parse_block_statement()
345-            handler = CatchClause(Identifier(param.value), catch_body)
346-
--
408:        self._consume_semicolon()
409-        return ExpressionStatement(expr)
410-
411:    def _consume_semicolon(self) -> None:
412-        """Consume a semicolon if present (ASI simulation)."""
413-        self._match(TokenType.SEMICOLON)
414-
415-    # ---- Expressions ----
416-
417-    def _parse_expression(self, exclude_in: bool = False) -> Node:
418-        """Parse an expression (includes comma operator)."""
419-        expr = self._parse_assignment_expression(exclude_in)
420-
421-        if self._check(TokenType.COMMA):
422-            expressions = [expr]
423-            while self._match(TokenType.COMMA):
424-                expressions.append(self._parse_assignment_expression(exclude_in))
425-            return SequenceExpression(expressions)
426-

No matches found

No matches found

src/mquickjs_python/tokens.py:8:class TokenType(Enum):
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-9-    """JavaScript token types."""
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-10-
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-11-    # End of file
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-12-    EOF = auto()
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-13-
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-14-    # Literals
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-15-    NUMBER = auto()
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-16-    STRING = auto()
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-17-    REGEX = auto()
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-18-
--
src/mquickjs_python/tokens.py:151:class Token:
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-152-    """A token from the JavaScript source."""
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-153-
src/mquickjs_python/tokens.py-154-    type: TokenType
src/mquickjs_python/tokens.py-155-    value: Any
src/mquickjs_python/tokens.py-156-    line: int
src/mquickjs_python/tokens.py-157-    column: int
/home/user/mquickjs-python/src/mquickjs_python/tokens.py-158-
src/mquickjs_python/tokens.py-159-    def __repr__(self) -> str:
src/mquickjs_python/tokens.py-160-        if self.value is not None:
src/mquickjs_python/tokens.py-161-            return f"Token({self.type.name}, {self.value!r}, {self.line}:{self.column})"

    70→        if self.current.type != token_type:
    71→            raise self._error(message)
    72→        return self._advance()
    73→
    74→    def _is_at_end(self) -> bool:
    75→        """Check if we've reached the end of input."""
    76→        return self.current.type == TokenType.EOF
    77→
    78→    def _is_keyword(self) -> bool:
    79→        """Check if current token is a keyword (reserved word)."""
    80→        # Keywords that can be used as property names in object literals
    81→        keyword_types = {
    82→            TokenType.IF, TokenType.ELSE, TokenType.FOR, TokenType.WHILE,
    83→            TokenType.DO, TokenType.SWITCH, TokenType.CASE, TokenType.DEFAULT,
    84→            TokenType.BREAK, TokenType.CONTINUE, TokenType.RETURN, TokenType.THROW,
    85→            TokenType.TRY, TokenType.CATCH, TokenType.FINALLY, TokenType.FUNCTION,
    86→            TokenType.VAR, TokenType.NEW, TokenType.DELETE, TokenType.TYPEOF,
    87→            TokenType.IN, TokenType.OF, TokenType.INSTANCEOF, TokenType.THIS,
    88→            TokenType.TRUE, TokenType.FALSE, TokenType.NULL, TokenType.VOID,
    89→        }
    90→        return self.current.type in keyword_types
    91→
    92→    def _peek_next(self) -> Token:
    93→        """Peek at the next token without consuming it."""
    94→        # Save current state
    95→        saved_pos = self.lexer.pos
    96→        saved_line = self.lexer.line
    97→        saved_column = self.lexer.column
    98→        saved_current = self.current
    99→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

    55→        return self.previous
    56→
    57→    def _check(self, *types: TokenType) -> bool:
    58→        """Check if current token is one of the given types."""
    59→        return self.current.type in types
    60→
    61→    def _match(self, *types: TokenType) -> bool:
    62→        """If current token matches, advance and return True."""
    63→        if self._check(*types):
    64→            self._advance()
    65→            return True
    66→        return False
    67→
    68→    def _expect(self, token_type: TokenType, message: str) -> Token:
    69→        """Expect a specific token type or raise error."""
    70→        if self.current.type != token_type:
    71→            raise self._error(message)
    72→        return self._advance()
    73→
    74→    def _is_at_end(self) -> bool:

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

   303→
   304→    def _parse_break_statement(self) -> BreakStatement:
   305→        """Parse break statement."""
   306→        label = None
   307→        if self._check(TokenType.IDENTIFIER):
   308→            label = Identifier(self._advance().value)
   309→        self._consume_semicolon()
   310→        return BreakStatement(label)
   311→
   312→    def _parse_continue_statement(self) -> ContinueStatement:
   313→        """Parse continue statement."""
   314→        label = None
   315→        if self._check(TokenType.IDENTIFIER):
   316→            label = Identifier(self._advance().value)
   317→        self._consume_semicolon()
   318→        return ContinueStatement(label)
   319→
   320→    def _parse_return_statement(self) -> ReturnStatement:
   321→        """Parse return statement."""
   322→        argument = None

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

<system-reminder>Warning: the file exists but is shorter than the provided offset (460). The file has 460 lines.</system-reminder>

   445→        ctx = JSContext()
   446→        result = ctx.eval("var o = new Object(); o.x = 1; o.x")
   447→        assert result == 1
   448→
   449→    def test_new_array(self):
   450→        """new Array() creates array."""
   451→        ctx = JSContext()
   452→        result = ctx.eval("new Array(3).length")
   453→        assert result == 3
   454→
   455→    def test_new_array_with_elements(self):
   456→        """new Array(1, 2, 3) creates array with elements."""
   457→        ctx = JSContext()
   458→        result = ctx.eval("var a = new Array(1, 2, 3); a[1]")
   459→        assert result == 2
   460→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/tests/test_vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   451→        ctx = JSContext()
   452→        result = ctx.eval("new Array(3).length")
   453→        assert result == 3
   454→
   455→    def test_new_array_with_elements(self):
   456→        """new Array(1, 2, 3) creates array with elements."""
   457→        ctx = JSContext()
   458→        result = ctx.eval("var a = new Array(1, 2, 3); a[1]")
   459→        assert result == 2
   460→
   461→
   462→class TestASI:
   463→    """Test automatic semicolon insertion."""
   464→
   465→    def test_break_asi_newline(self):
   466→        """break followed by identifier on new line should not consume identifier as label."""
   467→        ctx = JSContext()
   468→        # break should get ASI, i++ should be a separate statement
   469→        result = ctx.eval("""
   470→            var i = 0;
   471→            while (i < 3) {
   472→                if (i > 0)
   473→                    break
   474→                i++
   475→            }
   476→            i
   477→        """)
   478→        assert result == 1
   479→
   480→    def test_continue_asi_newline(self):
   481→        """continue followed by identifier on new line should not consume identifier as label."""
   482→        ctx = JSContext()
   483→        result = ctx.eval("""
   484→            var sum = 0;
   485→            for (var i = 0; i < 5; i++) {
   486→                if (i == 2)
   487→                    continue
   488→                sum += i
   489→            }
   490→            sum
   491→        """)
   492→        # 0 + 1 + 3 + 4 = 8 (skipping 2)
   493→        assert result == 8
   494→

The file /home/user/mquickjs-python/src/mquickjs_python/parser.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   300→
   301→        body = self._parse_statement()
   302→        return ForStatement(init, test, update, body)
   303→
   304→    def _parse_break_statement(self) -> BreakStatement:
   305→        """Parse break statement."""
   306→        label = None
   307→        # Only consume identifier as label if on same line (ASI rule)
   308→        if self._check(TokenType.IDENTIFIER) and self.current.line == self.previous.line:
   309→            label = Identifier(self._advance().value)
   310→        self._consume_semicolon()
   311→        return BreakStatement(label)
   312→
   313→    def _parse_continue_statement(self) -> ContinueStatement:
   314→        """Parse continue statement."""
   315→        label = None
   316→        # Only consume identifier as label if on same line (ASI rule)
   317→        if self._check(TokenType.IDENTIFIER) and self.current.line == self.previous.line:
   318→            label = Identifier(self._advance().value)
   319→        self._consume_semicolon()
   320→        return ContinueStatement(label)
   321→
   322→    def _parse_return_statement(self) -> ReturnStatement:
   323→        """Parse return statement."""
   324→        argument = None

============================= test session starts ==============================
platform linux -- Python 3.11.14, pytest-9.0.2, pluggy-1.6.0 -- /home/user/mquickjs-python/.venv/bin/python
cachedir: .pytest_cache
rootdir: /home/user/mquickjs-python
configfile: pyproject.toml
collecting ... collected 2 items

tests/test_vm.py::TestASI::test_break_asi_newline PASSED                 [ 50%]
tests/test_vm.py::TestASI::test_continue_asi_newline PASSED              [100%]

============================== 2 passed in 0.06s ===============================

FAILED: NotImplementedError: Update expression on non-identifier

tests/test_vm.py::TestGlobalAccess::test_set_global PASSED               [ 95%]
tests/test_vm.py::TestGlobalAccess::test_get_global PASSED               [ 95%]
tests/test_vm.py::TestVoidOperator::test_void_returns_undefined PASSED   [ 96%]
tests/test_vm.py::TestVoidOperator::test_void_expression PASSED          [ 96%]
tests/test_vm.py::TestVoidOperator::test_void_function_call PASSED       [ 96%]
tests/test_vm.py::TestForOf::test_for_of_array PASSED                    [ 96%]
tests/test_vm.py::TestForOf::test_for_of_string PASSED                   [ 97%]
tests/test_vm.py::TestGetterSetter::test_getter PASSED                   [ 97%]
tests/test_vm.py::TestGetterSetter::test_setter PASSED                   [ 97%]
tests/test_vm.py::TestGetterSetter::test_getter_setter_combined PASSED   [ 97%]
tests/test_vm.py::TestTryFinallyBreak::test_break_in_try_finally PASSED  [ 98%]
tests/test_vm.py::TestLabeledStatements::test_labeled_break_after_while PASSED [ 98%]
tests/test_vm.py::TestLabeledStatements::test_labeled_break_in_block PASSED [ 98%]
tests/test_vm.py::TestBuiltinConstructors::test_new_object PASSED        [ 98%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array PASSED         [ 99%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array_with_elements PASSED [ 99%]
tests/test_vm.py::TestASI::test_break_asi_newline PASSED                 [ 99%]
tests/test_vm.py::TestASI::test_continue_asi_newline PASSED              [100%]

======================== 390 passed, 5 xfailed in 4.55s ========================

2 files changed, 38 insertions(+), 2 deletions(-)

src/mquickjs_python/compiler.py:1189:                raise NotImplementedError("Update expression on non-identifier")

  1170→                            else:
  1171→                                self._emit(OpCode.DUP)
  1172→                                self._emit(inc_op)
  1173→                                self._emit(OpCode.STORE_CLOSURE, closure_slot)
  1174→                                self._emit(OpCode.POP)
  1175→                        else:
  1176→                            idx = self._add_name(name)
  1177→                            self._emit(OpCode.LOAD_NAME, idx)
  1178→                            if node.prefix:
  1179→                                self._emit(inc_op)
  1180→                                self._emit(OpCode.DUP)
  1181→                                self._emit(OpCode.STORE_NAME, idx)
  1182→                                self._emit(OpCode.POP)
  1183→                            else:
  1184→                                self._emit(OpCode.DUP)
  1185→                                self._emit(inc_op)
  1186→                                self._emit(OpCode.STORE_NAME, idx)
  1187→                                self._emit(OpCode.POP)
  1188→            else:
  1189→                raise NotImplementedError("Update expression on non-identifier")
  1190→
  1191→        elif isinstance(node, BinaryExpression):
  1192→            self._compile_expression(node.left)
  1193→            self._compile_expression(node.right)
  1194→            op_map = {
  1195→                "+": OpCode.ADD,
  1196→                "-": OpCode.SUB,
  1197→                "*": OpCode.MUL,
  1198→                "/": OpCode.DIV,
  1199→                "%": OpCode.MOD,
  1200→                "**": OpCode.POW,
  1201→                "&": OpCode.BAND,
  1202→                "|": OpCode.BOR,
  1203→                "^": OpCode.BXOR,
  1204→                "<<": OpCode.SHL,
  1205→                ">>": OpCode.SHR,
  1206→                ">>>": OpCode.USHR,
  1207→                "<": OpCode.LT,
  1208→                "<=": OpCode.LE,
  1209→                ">": OpCode.GT,

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

  1135→                    self._emit(OpCode.LOAD_CELL, cell_slot)
  1136→                    if node.prefix:
  1137→                        self._emit(inc_op)
  1138→                        self._emit(OpCode.DUP)
  1139→                        self._emit(OpCode.STORE_CELL, cell_slot)
  1140→                        self._emit(OpCode.POP)
  1141→                    else:
  1142→                        self._emit(OpCode.DUP)
  1143→                        self._emit(inc_op)
  1144→                        self._emit(OpCode.STORE_CELL, cell_slot)
  1145→                        self._emit(OpCode.POP)
  1146→                else:
  1147→                    slot = self._get_local(name)
  1148→                    if slot is not None:
  1149→                        self._emit(OpCode.LOAD_LOCAL, slot)
  1150→                        if node.prefix:
  1151→                            self._emit(inc_op)
  1152→                            self._emit(OpCode.DUP)
  1153→                            self._emit(OpCode.STORE_LOCAL, slot)
  1154→                            self._emit(OpCode.POP)
  1155→                        else:
  1156→                            self._emit(OpCode.DUP)
  1157→                            self._emit(inc_op)
  1158→                            self._emit(OpCode.STORE_LOCAL, slot)
  1159→                            self._emit(OpCode.POP)
  1160→                    else:
  1161→                        # Check if it's a free variable (from outer scope)
  1162→                        closure_slot = self._get_free_var(name)
  1163→                        if closure_slot is not None:
  1164→                            self._emit(OpCode.LOAD_CLOSURE, closure_slot)
  1165→                            if node.prefix:
  1166→                                self._emit(inc_op)
  1167→                                self._emit(OpCode.DUP)
  1168→                                self._emit(OpCode.STORE_CLOSURE, closure_slot)
  1169→                                self._emit(OpCode.POP)
  1170→                            else:
  1171→                                self._emit(OpCode.DUP)
  1172→                                self._emit(inc_op)
  1173→                                self._emit(OpCode.STORE_CLOSURE, closure_slot)
  1174→                                self._emit(OpCode.POP)
  1175→                        else:
  1176→                            idx = self._add_name(name)
  1177→                            self._emit(OpCode.LOAD_NAME, idx)
  1178→                            if node.prefix:
  1179→                                self._emit(inc_op)
  1180→                                self._emit(OpCode.DUP)
  1181→                                self._emit(OpCode.STORE_NAME, idx)
  1182→                                self._emit(OpCode.POP)
  1183→                            else:
  1184→                                self._emit(OpCode.DUP)
  1185→                                self._emit(inc_op)
  1186→                                self._emit(OpCode.STORE_NAME, idx)
  1187→                                self._emit(OpCode.POP)
  1188→            else:
  1189→                raise NotImplementedError("Update expression on non-identifier")
  1190→
  1191→        elif isinstance(node, BinaryExpression):
  1192→            self._compile_expression(node.left)
  1193→            self._compile_expression(node.right)
  1194→            op_map = {

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

  1105→                self._emit(op_map[node.operator])
  1106→            elif node.operator == "delete":
  1107→                # Handle delete specially
  1108→                if isinstance(node.argument, MemberExpression):
  1109→                    # Recompile as delete operation
  1110→                    self._compile_expression(node.argument.object)
  1111→                    if node.argument.computed:
  1112→                        self._compile_expression(node.argument.property)
  1113→                    else:
  1114→                        idx = self._add_constant(node.argument.property.name)
  1115→                        self._emit(OpCode.LOAD_CONST, idx)
  1116→                    self._emit(OpCode.DELETE_PROP)
  1117→                else:
  1118→                    self._emit(OpCode.LOAD_TRUE)  # delete on non-property returns true
  1119→            elif node.operator == "void":
  1120→                # void evaluates argument for side effects, returns undefined
  1121→                self._emit(OpCode.POP)  # Discard the argument value
  1122→                self._emit(OpCode.LOAD_UNDEFINED)
  1123→            else:
  1124→                raise NotImplementedError(f"Unary operator: {node.operator}")
  1125→
  1126→        elif isinstance(node, UpdateExpression):
  1127→            # ++x or x++
  1128→            if isinstance(node.argument, Identifier):
  1129→                name = node.argument.name
  1130→                inc_op = OpCode.INC if node.operator == "++" else OpCode.DEC
  1131→
  1132→                # Check if it's a cell var (local that's captured by inner function)
  1133→                cell_slot = self._get_cell_var(name)
  1134→                if cell_slot is not None:
  1135→                    self._emit(OpCode.LOAD_CELL, cell_slot)
  1136→                    if node.prefix:
  1137→                        self._emit(inc_op)
  1138→                        self._emit(OpCode.DUP)
  1139→                        self._emit(OpCode.STORE_CELL, cell_slot)
  1140→                        self._emit(OpCode.POP)
  1141→                    else:
  1142→                        self._emit(OpCode.DUP)
  1143→                        self._emit(inc_op)
  1144→                        self._emit(OpCode.STORE_CELL, cell_slot)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

No matches found

src/mquickjs_python/opcodes.py:30:    SET_PROP = auto()     # Set property: obj, key, value -> value
src/mquickjs_python/compiler.py:480:                # We need for SET_PROP: obj, prop, key -> value (leaves value on stack)
src/mquickjs_python/compiler.py:492:                self._emit(OpCode.SET_PROP)
src/mquickjs_python/compiler.py:493:                self._emit(OpCode.POP)  # Pop the result of SET_PROP
src/mquickjs_python/compiler.py:1308:                self._emit(OpCode.SET_PROP)
src/mquickjs_python/vm.py:258:        elif op == OpCode.SET_PROP:

   475→                    self._emit(OpCode.STORE_NAME, idx)
   476→                self._emit(OpCode.POP)
   477→            elif isinstance(node.left, MemberExpression):
   478→                # for (obj.prop in ...) or for (obj[key] in ...)
   479→                # After FOR_IN_NEXT: stack has [..., iterator, key]
   480→                # We need for SET_PROP: obj, prop, key -> value (leaves value on stack)
   481→                # Compile obj and prop first, then rotate key to top
   482→                self._compile_expression(node.left.object)
   483→                if node.left.computed:
   484→                    self._compile_expression(node.left.property)
   485→                else:
   486→                    idx = self._add_constant(node.left.property.name)
   487→                    self._emit(OpCode.LOAD_CONST, idx)
   488→                # Stack is now: [..., iterator, key, obj, prop]
   489→                # We need: [..., iterator, obj, prop, key]
   490→                # ROT3 on (key, obj, prop) gives (obj, prop, key)
   491→                self._emit(OpCode.ROT3)
   492→                self._emit(OpCode.SET_PROP)
   493→                self._emit(OpCode.POP)  # Pop the result of SET_PROP
   494→            else:
   495→                raise NotImplementedError(f"Unsupported for-in left: {type(node.left).__name__}")
   496→
   497→            self._compile_statement(node.body)
   498→
   499→            self._emit(OpCode.JUMP, loop_start)
   500→            self._patch_jump(jump_done)
   501→            self._emit(OpCode.POP)  # Pop iterator
   502→
   503→            # Patch break and continue jumps
   504→            for pos in loop_ctx.break_jumps:

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

9:    ConditionalExpression, AssignmentExpression, SequenceExpression,
10-    MemberExpression, CallExpression, NewExpression,
11-    ExpressionStatement, BlockStatement, EmptyStatement,
12-    VariableDeclaration, VariableDeclarator,
13-    IfStatement, WhileStatement, DoWhileStatement, ForStatement,
14-    ForInStatement, ForOfStatement, BreakStatement, ContinueStatement,
15-    ReturnStatement, ThrowStatement, TryStatement, CatchClause,
16-    SwitchStatement, SwitchCase, LabeledStatement,
17-    FunctionDeclaration, FunctionExpression, ArrowFunctionExpression,
18-)
19-from .opcodes import OpCode
20-from .values import UNDEFINED
21-
22-
23-@dataclass
24-class CompiledFunction:
25-    """A compiled function."""
26-    name: str
27-    params: List[str]
28-    bytecode: bytes
29-    constants: List[Any]
30-    locals: List[str]
31-    num_locals: int
32-    free_vars: List[str] = field(default_factory=list)  # Variables captured from outer scope
33-    cell_vars: List[str] = field(default_factory=list)  # Local variables that are captured by inner functions
34-
35-
36-@dataclass
37-class LoopContext:
38-    """Context for loops (for break/continue)."""
39-    break_jumps: List[int] = field(default_factory=list)
--
1249:        elif isinstance(node, AssignmentExpression):
1250-            if isinstance(node.left, Identifier):
1251-                name = node.left.name
1252-                if node.operator == "=":
1253-                    self._compile_expression(node.right)
1254-                else:
1255-                    # Compound assignment - load current value first
1256-                    cell_slot = self._get_cell_var(name)
1257-                    if cell_slot is not None:
1258-                        self._emit(OpCode.LOAD_CELL, cell_slot)
1259-                    else:
1260-                        slot = self._get_local(name)
1261-                        if slot is not None:
1262-                            self._emit(OpCode.LOAD_LOCAL, slot)
1263-                        else:
1264-                            closure_slot = self._get_free_var(name)
1265-                            if closure_slot is not None:
1266-                                self._emit(OpCode.LOAD_CLOSURE, closure_slot)
1267-                            else:
1268-                                idx = self._add_name(name)
1269-                                self._emit(OpCode.LOAD_NAME, idx)
1270-                    self._compile_expression(node.right)
1271-                    op = node.operator[:-1]  # Remove '='
1272-                    op_map = {
1273-                        "+": OpCode.ADD, "-": OpCode.SUB,
1274-                        "*": OpCode.MUL, "/": OpCode.DIV,
1275-                        "%": OpCode.MOD, "&": OpCode.BAND,
1276-                        "|": OpCode.BOR, "^": OpCode.BXOR,
1277-                        "<<": OpCode.SHL, ">>": OpCode.SHR,
1278-                        ">>>": OpCode.USHR,
1279-                    }

  1285→                    self._emit(OpCode.STORE_CELL, cell_slot)
  1286→                else:
  1287→                    slot = self._get_local(name)
  1288→                    if slot is not None:
  1289→                        self._emit(OpCode.STORE_LOCAL, slot)
  1290→                    else:
  1291→                        closure_slot = self._get_free_var(name)
  1292→                        if closure_slot is not None:
  1293→                            self._emit(OpCode.STORE_CLOSURE, closure_slot)
  1294→                        else:
  1295→                            idx = self._add_name(name)
  1296→                            self._emit(OpCode.STORE_NAME, idx)
  1297→                self._emit(OpCode.POP)
  1298→
  1299→            elif isinstance(node.left, MemberExpression):
  1300→                # obj.prop = value or obj[key] = value
  1301→                self._compile_expression(node.left.object)
  1302→                if node.left.computed:
  1303→                    self._compile_expression(node.left.property)
  1304→                else:
  1305→                    idx = self._add_constant(node.left.property.name)
  1306→                    self._emit(OpCode.LOAD_CONST, idx)
  1307→                self._compile_expression(node.right)
  1308→                self._emit(OpCode.SET_PROP)
  1309→
  1310→        elif isinstance(node, SequenceExpression):
  1311→            for i, expr in enumerate(node.expressions):
  1312→                self._compile_expression(expr)
  1313→                if i < len(node.expressions) - 1:
  1314→                    self._emit(OpCode.POP)
  1315→
  1316→        elif isinstance(node, MemberExpression):
  1317→            self._compile_expression(node.object)
  1318→            if node.computed:
  1319→                self._compile_expression(node.property)
  1320→            else:
  1321→                idx = self._add_constant(node.property.name)
  1322→                self._emit(OpCode.LOAD_CONST, idx)
  1323→            self._emit(OpCode.GET_PROP)
  1324→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

11:    DUP = auto()          # Duplicate top of stack
13:    ROT3 = auto()         # Rotate 3 items: a, b, c -> b, c, a

     1→"""Bytecode opcodes for the JavaScript VM."""
     2→
     3→from enum import IntEnum, auto
     4→
     5→
     6→class OpCode(IntEnum):
     7→    """Bytecode operation codes."""
     8→
     9→    # Stack operations
    10→    POP = auto()          # Pop and discard top of stack
    11→    DUP = auto()          # Duplicate top of stack
    12→    SWAP = auto()         # Swap top two stack items
    13→    ROT3 = auto()         # Rotate 3 items: a, b, c -> b, c, a
    14→
    15→    # Constants
    16→    LOAD_CONST = auto()   # Load constant from pool: arg = constant index
    17→    LOAD_UNDEFINED = auto()
    18→    LOAD_NULL = auto()
    19→    LOAD_TRUE = auto()
    20→    LOAD_FALSE = auto()

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/opcodes.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     5→
     6→class OpCode(IntEnum):
     7→    """Bytecode operation codes."""
     8→
     9→    # Stack operations
    10→    POP = auto()          # Pop and discard top of stack
    11→    DUP = auto()          # Duplicate top of stack
    12→    DUP2 = auto()         # Duplicate top two stack items: a, b -> a, b, a, b
    13→    SWAP = auto()         # Swap top two stack items
    14→    ROT3 = auto()         # Rotate 3 items: a, b, c -> b, c, a
    15→    ROT4 = auto()         # Rotate 4 items: a, b, c, d -> b, c, d, a
    16→
    17→    # Constants
    18→    LOAD_CONST = auto()   # Load constant from pool: arg = constant index
    19→    LOAD_UNDEFINED = auto()

179:        elif op == OpCode.DUP:
180-            self.stack.append(self.stack[-1])
181-
182-        elif op == OpCode.SWAP:
183-            self.stack[-1], self.stack[-2] = self.stack[-2], self.stack[-1]
184-

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   175→        if op == OpCode.POP:
   176→            if self.stack:
   177→                self.stack.pop()
   178→
   179→        elif op == OpCode.DUP:
   180→            self.stack.append(self.stack[-1])
   181→
   182→        elif op == OpCode.DUP2:
   183→            # Duplicate top two items: a, b -> a, b, a, b
   184→            self.stack.append(self.stack[-2])
   185→            self.stack.append(self.stack[-2])
   186→
   187→        elif op == OpCode.SWAP:
   188→            self.stack[-1], self.stack[-2] = self.stack[-2], self.stack[-1]
   189→
   190→        elif op == OpCode.ROT3:
   191→            # Rotate 3 items: a, b, c -> b, c, a
   192→            a = self.stack[-3]

   190→        elif op == OpCode.ROT3:
   191→            # Rotate 3 items: a, b, c -> b, c, a
   192→            a = self.stack[-3]
   193→            b = self.stack[-2]
   194→            c = self.stack[-1]
   195→            self.stack[-3] = b
   196→            self.stack[-2] = c
   197→            self.stack[-1] = a
   198→
   199→        # Constants
   200→        elif op == OpCode.LOAD_CONST:
   201→            self.stack.append(frame.func.constants[arg])
   202→
   203→        elif op == OpCode.LOAD_UNDEFINED:
   204→            self.stack.append(UNDEFINED)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   186→
   187→        elif op == OpCode.SWAP:
   188→            self.stack[-1], self.stack[-2] = self.stack[-2], self.stack[-1]
   189→
   190→        elif op == OpCode.ROT3:
   191→            # Rotate 3 items: a, b, c -> b, c, a
   192→            a = self.stack[-3]
   193→            b = self.stack[-2]
   194→            c = self.stack[-1]
   195→            self.stack[-3] = b
   196→            self.stack[-2] = c
   197→            self.stack[-1] = a
   198→
   199→        elif op == OpCode.ROT4:
   200→            # Rotate 4 items: a, b, c, d -> b, c, d, a
   201→            a = self.stack[-4]
   202→            b = self.stack[-3]
   203→            c = self.stack[-2]
   204→            d = self.stack[-1]
   205→            self.stack[-4] = b
   206→            self.stack[-3] = c
   207→            self.stack[-2] = d
   208→            self.stack[-1] = a
   209→
   210→        # Constants
   211→        elif op == OpCode.LOAD_CONST:
   212→            self.stack.append(frame.func.constants[arg])
   213→
   214→        elif op == OpCode.LOAD_UNDEFINED:

   488→                sum += i
   489→            }
   490→            sum
   491→        """)
   492→        # 0 + 1 + 3 + 4 = 8 (skipping 2)
   493→        assert result == 8
   494→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/tests/test_vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   488→                sum += i
   489→            }
   490→            sum
   491→        """)
   492→        # 0 + 1 + 3 + 4 = 8 (skipping 2)
   493→        assert result == 8
   494→
   495→
   496→class TestMemberUpdate:
   497→    """Test update expressions on member expressions."""
   498→
   499→    def test_object_property_postfix_increment(self):
   500→        """a.x++ returns old value and increments."""
   501→        ctx = JSContext()
   502→        result = ctx.eval("""
   503→            var a = {x: 5};
   504→            var r = a.x++;
   505→            [r, a.x]
   506→        """)
   507→        assert result[0] == 5
   508→        assert result[1] == 6
   509→
   510→    def test_object_property_prefix_increment(self):
   511→        """++a.x returns new value."""
   512→        ctx = JSContext()
   513→        result = ctx.eval("""
   514→            var a = {x: 5};
   515→            var r = ++a.x;
   516→            [r, a.x]
   517→        """)
   518→        assert result[0] == 6
   519→        assert result[1] == 6
   520→
   521→    def test_array_element_postfix_increment(self):
   522→        """arr[0]++ works."""
   523→        ctx = JSContext()
   524→        result = ctx.eval("""
   525→            var arr = [10];
   526→            var r = arr[0]++;
   527→            [r, arr[0]]
   528→        """)
   529→        assert result[0] == 10
   530→        assert result[1] == 11
   531→
   532→    def test_object_property_decrement(self):
   533→        """a.x-- works."""
   534→        ctx = JSContext()
   535→        result = ctx.eval("""
   536→            var a = {x: 5};
   537→            var r = a.x--;
   538→            [r, a.x]
   539→        """)
   540→        assert result[0] == 5
   541→        assert result[1] == 4
   542→

                            idx = self._add_name(name)
                            self._emit(OpCode.LOAD_NAME, idx)
                            if node.prefix:
                                self._emit(inc_op)
                                self._emit(OpCode.DUP)
                                self._emit(OpCode.STORE_NAME, idx)
                                self._emit(OpCode.POP)
                            else:
                                self._emit(OpCode.DUP)
                                self._emit(inc_op)
                                self._emit(OpCode.STORE_NAME, idx)
                                self._emit(OpCode.POP)
            else:
>               raise NotImplementedError("Update expression on non-identifier")
E               NotImplementedError: Update expression on non-identifier

src/mquickjs_python/compiler.py:1189: NotImplementedError
=========================== short test summary info ============================
FAILED tests/test_vm.py::TestMemberUpdate::test_object_property_postfix_increment
============================== 1 failed in 0.30s ===============================

The file /home/user/mquickjs-python/src/mquickjs_python/compiler.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1184→                                self._emit(OpCode.DUP)
  1185→                                self._emit(inc_op)
  1186→                                self._emit(OpCode.STORE_NAME, idx)
  1187→                                self._emit(OpCode.POP)
  1188→            elif isinstance(node.argument, MemberExpression):
  1189→                # a.x++ or arr[i]++
  1190→                inc_op = OpCode.INC if node.operator == "++" else OpCode.DEC
  1191→
  1192→                # Compile object
  1193→                self._compile_expression(node.argument.object)
  1194→                # Compile property (or load constant)
  1195→                if node.argument.computed:
  1196→                    self._compile_expression(node.argument.property)
  1197→                else:
  1198→                    idx = self._add_constant(node.argument.property.name)
  1199→                    self._emit(OpCode.LOAD_CONST, idx)
  1200→
  1201→                # Stack: [obj, prop]
  1202→                self._emit(OpCode.DUP2)  # [obj, prop, obj, prop]
  1203→                self._emit(OpCode.GET_PROP)  # [obj, prop, old_value]
  1204→
  1205→                if node.prefix:
  1206→                    # ++a.x: return new value
  1207→                    self._emit(inc_op)  # [obj, prop, new_value]
  1208→                    self._emit(OpCode.DUP)  # [obj, prop, new_value, new_value]
  1209→                    self._emit(OpCode.ROT4)  # [new_value, obj, prop, new_value]
  1210→                    self._emit(OpCode.SET_PROP)  # [new_value, new_value]
  1211→                    self._emit(OpCode.POP)  # [new_value]
  1212→                else:
  1213→                    # a.x++: return old value
  1214→                    self._emit(OpCode.DUP)  # [obj, prop, old_value, old_value]
  1215→                    self._emit(inc_op)  # [obj, prop, old_value, new_value]
  1216→                    self._emit(OpCode.ROT4)  # [new_value, obj, prop, old_value]
  1217→                    self._emit(OpCode.ROT4)  # [old_value, new_value, obj, prop]
  1218→                    self._emit(OpCode.ROT4)  # [prop, old_value, new_value, obj]
  1219→                    self._emit(OpCode.ROT4)  # [obj, prop, old_value, new_value]
  1220→                    # Hmm this is wrong. Let me think again...
  1221→                    # After DUP: [obj, prop, old_value, old_value]
  1222→                    # After inc: [obj, prop, old_value, new_value]
  1223→                    # We need: old_value on top, and do SET_PROP(obj, prop, new_value)
  1224→                    # ROT4 would give us: [prop, old_value, new_value, obj]
  1225→                    # That's not right either.
  1226→                    # Let me use SWAP instead: [obj, prop, new_value, old_value]
  1227→                    # Then ROT4: [prop, new_value, old_value, obj]
  1228→                    # Still not right.
  1229→                    # The issue is SET_PROP expects (obj, prop, val) and leaves val.
  1230→                    # Stack is [obj, prop, old_value, new_value]
  1231→                    # Need to move old_value out: [old_value, obj, prop, new_value]?
  1232→                    # No, after SET_PROP we'd have [old_value, new_value]
  1233→                    # We want only [old_value]
  1234→            else:
  1235→                raise NotImplementedError("Update expression on non-identifier")
  1236→
  1237→        elif isinstance(node, BinaryExpression):
  1238→            self._compile_expression(node.left)
  1239→            self._compile_expression(node.right)

The file /home/user/mquickjs-python/src/mquickjs_python/compiler.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1184→                                self._emit(OpCode.DUP)
  1185→                                self._emit(inc_op)
  1186→                                self._emit(OpCode.STORE_NAME, idx)
  1187→                                self._emit(OpCode.POP)
  1188→            elif isinstance(node.argument, MemberExpression):
  1189→                # a.x++ or arr[i]++
  1190→                inc_op = OpCode.INC if node.operator == "++" else OpCode.DEC
  1191→
  1192→                # Compile object
  1193→                self._compile_expression(node.argument.object)
  1194→                # Compile property (or load constant)
  1195→                if node.argument.computed:
  1196→                    self._compile_expression(node.argument.property)
  1197→                else:
  1198→                    idx = self._add_constant(node.argument.property.name)
  1199→                    self._emit(OpCode.LOAD_CONST, idx)
  1200→
  1201→                # Stack: [obj, prop]
  1202→                self._emit(OpCode.DUP2)  # [obj, prop, obj, prop]
  1203→                self._emit(OpCode.GET_PROP)  # [obj, prop, old_value]
  1204→
  1205→                if node.prefix:
  1206→                    # ++a.x: return new value
  1207→                    self._emit(inc_op)  # [obj, prop, new_value]
  1208→                    self._emit(OpCode.DUP)  # [obj, prop, new_value, new_value]
  1209→                    self._emit(OpCode.ROT4)  # [new_value, obj, prop, new_value]
  1210→                    self._emit(OpCode.SET_PROP)  # [new_value, new_value]
  1211→                    self._emit(OpCode.POP)  # [new_value]
  1212→                else:
  1213→                    # a.x++: return old value
  1214→                    self._emit(OpCode.DUP)  # [obj, prop, old_value, old_value]
  1215→                    self._emit(inc_op)  # [obj, prop, old_value, new_value]
  1216→                    # Rearrange: [obj, prop, old_value, new_value] -> [old_value, obj, prop, new_value]
  1217→                    self._emit(OpCode.SWAP)  # [obj, prop, new_value, old_value]
  1218→                    self._emit(OpCode.ROT4)  # [prop, new_value, old_value, obj]
  1219→                    self._emit(OpCode.ROT4)  # [new_value, old_value, obj, prop]
  1220→                    self._emit(OpCode.ROT4)  # [old_value, obj, prop, new_value]
  1221→                    self._emit(OpCode.SET_PROP)  # [old_value, new_value]
  1222→                    self._emit(OpCode.POP)  # [old_value]
  1223→            else:
  1224→                raise NotImplementedError("Update expression on non-identifier")
  1225→
  1226→        elif isinstance(node, BinaryExpression):

The file /home/user/mquickjs-python/src/mquickjs_python/compiler.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1201→                # Stack: [obj, prop]
  1202→                self._emit(OpCode.DUP2)  # [obj, prop, obj, prop]
  1203→                self._emit(OpCode.GET_PROP)  # [obj, prop, old_value]
  1204→
  1205→                if node.prefix:
  1206→                    # ++a.x: return new value
  1207→                    self._emit(inc_op)  # [obj, prop, new_value]
  1208→                    self._emit(OpCode.DUP)  # [obj, prop, new_value, new_value]
  1209→                    # Rearrange: [obj, prop, nv, nv] -> [nv, obj, prop, nv]
  1210→                    self._emit(OpCode.ROT4)  # [prop, nv, nv, obj]
  1211→                    self._emit(OpCode.ROT4)  # [nv, nv, obj, prop]
  1212→                    self._emit(OpCode.ROT4)  # [nv, obj, prop, nv]
  1213→                    self._emit(OpCode.SET_PROP)  # [nv, nv]
  1214→                    self._emit(OpCode.POP)  # [nv]
  1215→                else:
  1216→                    # a.x++: return old value
  1217→                    self._emit(OpCode.DUP)  # [obj, prop, old_value, old_value]
  1218→                    self._emit(inc_op)  # [obj, prop, old_value, new_value]

============================= test session starts ==============================
platform linux -- Python 3.11.14, pytest-9.0.2, pluggy-1.6.0 -- /home/user/mquickjs-python/.venv/bin/python
cachedir: .pytest_cache
rootdir: /home/user/mquickjs-python
configfile: pyproject.toml
collecting ... collected 4 items

tests/test_vm.py::TestMemberUpdate::test_object_property_postfix_increment PASSED [ 25%]
tests/test_vm.py::TestMemberUpdate::test_object_property_prefix_increment PASSED [ 50%]
tests/test_vm.py::TestMemberUpdate::test_array_element_postfix_increment PASSED [ 75%]
tests/test_vm.py::TestMemberUpdate::test_object_property_decrement PASSED [100%]

============================== 4 passed in 0.07s ===============================

tests/test_vm.py::TestVoidOperator::test_void_function_call PASSED       [ 95%]
tests/test_vm.py::TestForOf::test_for_of_array PASSED                    [ 95%]
tests/test_vm.py::TestForOf::test_for_of_string PASSED                   [ 96%]
tests/test_vm.py::TestGetterSetter::test_getter PASSED                   [ 96%]
tests/test_vm.py::TestGetterSetter::test_setter PASSED                   [ 96%]
tests/test_vm.py::TestGetterSetter::test_getter_setter_combined PASSED   [ 96%]
tests/test_vm.py::TestTryFinallyBreak::test_break_in_try_finally PASSED  [ 97%]
tests/test_vm.py::TestLabeledStatements::test_labeled_break_after_while PASSED [ 97%]
tests/test_vm.py::TestLabeledStatements::test_labeled_break_in_block PASSED [ 97%]
tests/test_vm.py::TestBuiltinConstructors::test_new_object PASSED        [ 97%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array PASSED         [ 98%]
tests/test_vm.py::TestBuiltinConstructors::test_new_array_with_elements PASSED [ 98%]
tests/test_vm.py::TestASI::test_break_asi_newline PASSED                 [ 98%]
tests/test_vm.py::TestASI::test_continue_asi_newline PASSED              [ 98%]
tests/test_vm.py::TestMemberUpdate::test_object_property_postfix_increment PASSED [ 99%]
tests/test_vm.py::TestMemberUpdate::test_object_property_prefix_increment PASSED [ 99%]
tests/test_vm.py::TestMemberUpdate::test_array_element_postfix_increment PASSED [ 99%]
tests/test_vm.py::TestMemberUpdate::test_object_property_decrement PASSED [100%]

======================== 394 passed, 5 xfailed in 4.61s ========================

FAILED: JSError: Error: assertion failed: got number:|2147483648|, expected number:|-2147483648| (1 << 31 === -2147483648)

4 files changed, 104 insertions(+)

393:        elif op == OpCode.SHL:
394-            b = self.stack.pop()
395-            a = self.stack.pop()
396-            shift = self._to_uint32(b) & 0x1F
397-            self.stack.append(self._to_int32(a) << shift)
398-

665:    def _to_int32(self, value: JSValue) -> int:
666-        """Convert to 32-bit signed integer."""
667-        n = to_number(value)
668-        if math.isnan(n) or math.isinf(n) or n == 0:
669-            return 0
670-        n = int(n)
671-        n = n & 0xFFFFFFFF
672-        if n >= 0x80000000:
673-            n -= 0x100000000
674-        return n
675-

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   389→        elif op == OpCode.BNOT:
   390→            a = self.stack.pop()
   391→            self.stack.append(~self._to_int32(a))
   392→
   393→        elif op == OpCode.SHL:
   394→            b = self.stack.pop()
   395→            a = self.stack.pop()
   396→            shift = self._to_uint32(b) & 0x1F
   397→            result = self._to_int32(a) << shift
   398→            # Convert result back to signed 32-bit
   399→            result = result & 0xFFFFFFFF
   400→            if result >= 0x80000000:
   401→                result -= 0x100000000
   402→            self.stack.append(result)
   403→
   404→        elif op == OpCode.SHR:
   405→            b = self.stack.pop()
   406→            a = self.stack.pop()

1 << 31 = -2147483648
Test passed!

~1 = -2
Test passed!

PASS: 1 << 31 = -2147483648
PASS: 1 << 30 = 1073741824
PASS: ~1 = -2
PASS: ~0 = -1
PASS: (-4) >> 1 = -2
PASS: (-4) >>> 1 = 2147483646
PASS: -1 >>> 0 = 4294967295

FAILED: JSError: Error: assertion failed: got number:|Infinity|, expected number:|-Infinity|

143:    assert(1/(-0.0), -Infinity);
145:    assert(1/(-a), -Infinity);
146:    assert(1/(0 * -6), -Infinity);
158:    assert((Infinity | 0), 0);
159:    assert(((-Infinity) | 0), 0);
167:    assert((Infinity >>> 0), 0);
168:    assert(((-Infinity) >>> 0), 0);

FAIL: 1/(-0.0) = inf, expected -inf
FAIL: var a = 0; 1/(-a) = inf, expected -inf
FAIL: 1/(0 * -6) = inf, expected -inf

335:        elif op == OpCode.DIV:
336-            b = self.stack.pop()
337-            a = self.stack.pop()
338-            b_num = to_number(b)
339-            a_num = to_number(a)
340-            if b_num == 0:
341-                if a_num == 0:
342-                    self.stack.append(float('nan'))
343-                elif a_num > 0:
344-                    self.stack.append(float('inf'))
345-                else:
346-                    self.stack.append(float('-inf'))
347-            else:
348-                self.stack.append(a_num / b_num)
349-
350-        elif op == OpCode.MOD:

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   331→            b = self.stack.pop()
   332→            a = self.stack.pop()
   333→            self.stack.append(to_number(a) * to_number(b))
   334→
   335→        elif op == OpCode.DIV:
   336→            b = self.stack.pop()
   337→            a = self.stack.pop()
   338→            b_num = to_number(b)
   339→            a_num = to_number(a)
   340→            if b_num == 0:
   341→                # Check sign of zero using copysign
   342→                b_sign = math.copysign(1, b_num)
   343→                if a_num == 0:
   344→                    self.stack.append(float('nan'))
   345→                elif (a_num > 0) == (b_sign > 0):  # Same sign
   346→                    self.stack.append(float('inf'))
   347→                else:  # Different signs
   348→                    self.stack.append(float('-inf'))
   349→            else:
   350→                self.stack.append(a_num / b_num)
   351→
   352→        elif op == OpCode.MOD:
   353→            b = self.stack.pop()
   354→            a = self.stack.pop()

-0.0 = -0.0
Sign of result: -1.0
1 / (-0.0) = -inf

PASS: 1/(-0.0) = -inf
FAIL: var a = 0; 1/(-a) = inf, expected -inf
FAIL: 1/(0 * -6) = inf, expected -inf

367:        elif op == OpCode.NEG:
368-            a = self.stack.pop()
369-            self.stack.append(-to_number(a))
370-
371-        elif op == OpCode.POS:
372-            a = self.stack.pop()

-a = 0
type(-a) = <class 'int'>
sign = 1.0
-a = -0.0
type(-a) = <class 'float'>
sign = -1.0

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   363→            b = self.stack.pop()
   364→            a = self.stack.pop()
   365→            self.stack.append(to_number(a) ** to_number(b))
   366→
   367→        elif op == OpCode.NEG:
   368→            a = self.stack.pop()
   369→            n = to_number(a)
   370→            # Ensure -0 produces -0.0 (float)
   371→            if n == 0:
   372→                self.stack.append(-0.0 if math.copysign(1, n) > 0 else 0.0)
   373→            else:
   374→                self.stack.append(-n)
   375→
   376→        elif op == OpCode.POS:
   377→            a = self.stack.pop()
   378→            self.stack.append(to_number(a))

0 * -6 = 0
0.0 * -6 = -0.0
sign = -1.0

src/mquickjs_python/values.py:114:def to_number(value: JSValue) -> Union[int, float]:
/home/user/mquickjs-python/src/mquickjs_python/values.py-115-    """Convert a JavaScript value to number."""
src/mquickjs_python/values.py-116-    if value is UNDEFINED:
/home/user/mquickjs-python/src/mquickjs_python/values.py-117-        return float("nan")
src/mquickjs_python/values.py-118-    if value is NULL:
/home/user/mquickjs-python/src/mquickjs_python/values.py-119-        return 0
src/mquickjs_python/values.py-120-    if isinstance(value, bool):
/home/user/mquickjs-python/src/mquickjs_python/values.py-121-        return 1 if value else 0
src/mquickjs_python/values.py-122-    if isinstance(value, (int, float)):
/home/user/mquickjs-python/src/mquickjs_python/values.py-123-        return value
src/mquickjs_python/values.py-124-    if isinstance(value, str):
/home/user/mquickjs-python/src/mquickjs_python/values.py-125-        s = value.strip()
src/mquickjs_python/values.py-126-        if s == "":
/home/user/mquickjs-python/src/mquickjs_python/values.py-127-            return 0
src/mquickjs_python/values.py-128-        try:
src/mquickjs_python/values.py-129-            if "." in s or "e" in s.lower():
/home/user/mquickjs-python/src/mquickjs_python/values.py-130-                return float(s)
src/mquickjs_python/values.py-131-            if s.startswith("0x") or s.startswith("0X"):
/home/user/mquickjs-python/src/mquickjs_python/values.py-132-                return int(s, 16)
src/mquickjs_python/values.py-133-            if s.startswith("0o") or s.startswith("0O"):
/home/user/mquickjs-python/src/mquickjs_python/values.py-134-                return int(s, 8)

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   326→            b = self.stack.pop()
   327→            a = self.stack.pop()
   328→            self.stack.append(to_number(a) - to_number(b))
   329→
   330→        elif op == OpCode.MUL:
   331→            b = self.stack.pop()
   332→            a = self.stack.pop()
   333→            a_num = float(to_number(a))  # Use float for proper -0 handling
   334→            b_num = float(to_number(b))
   335→            self.stack.append(a_num * b_num)
   336→
   337→        elif op == OpCode.DIV:
   338→            b = self.stack.pop()
   339→            a = self.stack.pop()

PASS: 1/(-0.0) = -inf
PASS: var a = 0; 1/(-a) = -inf
PASS: 1/(0 * -6) = -inf

..                                                                       [ 42%]
tests/test_parser.py ................................................... [ 54%]
........                                                                 [ 56%]
tests/test_regex.py .................................................... [ 69%]
....................................                                     [ 78%]
tests/test_string_regex.py ...................                           [ 83%]
tests/test_vm.py ....................................................... [ 97%]
..........                                                               [100%]

======================== 394 passed, 5 xfailed in 4.59s ========================

FAILED: JSTypeError: TypeError: Cannot read property of undefined

Found functions: ['throw_error', 'assert', 'get_full_type', 'assert_throws', 'test_op1', 'test_cvt', 'test_eq', 'test_inc_dec', 'F', 'test_op2']

Traceback (most recent call last):
  File "<string>", line 6, in <module>
  File "/home/user/mquickjs-python/src/mquickjs_python/context.py", line 613, in eval
    result = vm.run(compiled)
             ^^^^^^^^^^^^^^^^
  File "/home/user/mquickjs-python/src/mquickjs_python/vm.py", line 106, in run
    return self._execute()
           ^^^^^^^^^^^^^^^
  File "/home/user/mquickjs-python/src/mquickjs_python/vm.py", line 163, in _execute
    self._execute_opcode(op, arg, frame)
  File "/home/user/mquickjs-python/src/mquickjs_python/vm.py", line 272, in _execute_opcode
    self.stack.append(self._get_property(obj, key))
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/mquickjs-python/src/mquickjs_python/vm.py", line 758, in _get_property
    raise JSTypeError(f"Cannot read property of {obj}")
mquickjs_python.errors.JSTypeError: TypeError: Cannot read property of undefined

PASS: test_op1
PASS: test_cvt
PASS: test_eq
PASS: test_inc_dec
FAIL: test_op2 - TypeError: Cannot read property of undefined
FAIL: test_prototype - TypeError: Cannot read property of undefined
FAIL: test_arguments - TypeError: Cannot read property of undefined
FAIL: test_to_primitive - TypeError: Cannot read property of undefined
FAIL: test_labels - TypeError: Cannot read property of undefined
FAIL: test_labels2 - TypeError: Cannot read property of undefined

Result: None
Type: <class 'NoneType'>

1640:    def _new_object(self, arg_count: int) -> None:
1641-        """Create a new object with constructor."""
1642-        args = []
1643-        for _ in range(arg_count):
1644-            args.insert(0, self.stack.pop())
1645-        constructor = self.stack.pop()
1646-
1647-        if isinstance(constructor, JSFunction):
1648-            # Create new object
1649-            obj = JSObject()
1650-            # Call constructor with new object as 'this'
1651-            self._invoke_js_function(constructor, args, obj)
1652-            # Result is the new object (or returned value if object)
1653-            self.stack.append(obj)
1654-        elif isinstance(constructor, JSObject) and hasattr(constructor, '_call_fn'):
1655-            # Built-in constructor (like Object, Array, RegExp)
1656-            result = constructor._call_fn(*args)
1657-            self.stack.append(result)
1658-        else:
1659-            raise JSTypeError(f"{constructor} is not a constructor")
1660-
1661-    def _throw(self, exc: JSValue) -> None:
1662-        """Throw an exception."""
1663-        if self.exception_handlers:
1664-            frame_idx, catch_ip = self.exception_handlers.pop()
1665-
1666-            # Unwind call stack
1667-            while len(self.call_stack) > frame_idx + 1:
1668-                self.call_stack.pop()
1669-
1670-            # Jump to catch handler
1671-            frame = self.call_stack[-1]
1672-            frame.ip = catch_ip
1673-
1674-            # Push exception value
1675-            self.stack.append(exc)
1676-        else:
1677-            # Uncaught exception
1678-            if isinstance(exc, str):
1679-                raise JSError(exc)
1680-            elif isinstance(exc, JSObject):
1681-                msg = exc.get("message")
1682-                raise JSError(to_string(msg) if msg else "Error")
1683-            else:
1684-                raise JSError(to_string(exc))

1573:    def _invoke_js_function(
1574-        self,
1575-        func: JSFunction,
1576-        args: List[JSValue],
1577-        this_val: JSValue,
1578-    ) -> None:
1579-        """Invoke a JavaScript function."""
1580-        # Handle bound functions
1581-        if hasattr(func, '_bound_this'):
1582-            this_val = func._bound_this
1583-        if hasattr(func, '_bound_args'):
1584-            args = list(func._bound_args) + list(args)
1585-        if hasattr(func, '_original_func'):
1586-            func = func._original_func
1587-
1588-        compiled = getattr(func, '_compiled', None)
1589-        if compiled is None:
1590-            raise JSTypeError("Function has no bytecode")
1591-
1592-        # Prepare locals (parameters + arguments + local variables)
1593-        locals_list = [UNDEFINED] * compiled.num_locals
1594-        for i, arg in enumerate(args):
1595-            if i < len(compiled.params):
1596-                locals_list[i] = arg
1597-
1598-        # Create 'arguments' object (stored after params in locals)
1599-        # The 'arguments' slot is at index len(compiled.params)
1600-        arguments_slot = len(compiled.params)
1601-        if arguments_slot < compiled.num_locals:
1602-            arguments_obj = JSArray()
1603-            arguments_obj._elements = list(args)

  1600→        arguments_slot = len(compiled.params)
  1601→        if arguments_slot < compiled.num_locals:
  1602→            arguments_obj = JSArray()
  1603→            arguments_obj._elements = list(args)
  1604→            locals_list[arguments_slot] = arguments_obj
  1605→
  1606→        # For named function expressions, bind the function name to itself
  1607→        # This allows recursive calls like: var f = function fact(n) { return fact(n-1); }
  1608→        if compiled.name and compiled.name in compiled.locals:
  1609→            name_slot = compiled.locals.index(compiled.name)
  1610→            if name_slot >= len(compiled.params) + 1:  # After params and arguments
  1611→                locals_list[name_slot] = func
  1612→
  1613→        # Get closure cells from the function
  1614→        closure_cells = getattr(func, '_closure_cells', None)
  1615→
  1616→        # Create cell storage for variables that will be captured by inner functions
  1617→        cell_storage = None
  1618→        if compiled.cell_vars:
  1619→            cell_storage = []
  1620→            for var_name in compiled.cell_vars:
  1621→                # Find the initial value from locals
  1622→                if var_name in compiled.locals:
  1623→                    slot = compiled.locals.index(var_name)
  1624→                    cell_storage.append(ClosureCell(locals_list[slot]))
  1625→                else:
  1626→                    cell_storage.append(ClosureCell(UNDEFINED))
  1627→
  1628→        # Create new call frame
  1629→        frame = CallFrame(
  1630→            func=compiled,
  1631→            ip=0,
  1632→            bp=len(self.stack),
  1633→            locals=locals_list,
  1634→            this_value=this_val,
  1635→            closure_cells=closure_cells,
  1636→            cell_storage=cell_storage,
  1637→        )
  1638→        self.call_stack.append(frame)
  1639→
  1640→    def _new_object(self, arg_count: int) -> None:
  1641→        """Create a new object with constructor."""
  1642→        args = []
  1643→        for _ in range(arg_count):
  1644→            args.insert(0, self.stack.pop())

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

506:        elif op == OpCode.CALL:
507-            self._call_function(arg, None)
508-
509-        elif op == OpCode.CALL_METHOD:
510-            # Stack: this, method, arg1, arg2, ...
511-            # Rearrange: this is before method
512-            args = []
513-            for _ in range(arg):
514-                args.insert(0, self.stack.pop())
515-            method = self.stack.pop()
516-            this_val = self.stack.pop()
517-            self._call_method(method, this_val, args)
518-
519-        elif op == OpCode.RETURN:
520-            result = self.stack.pop() if self.stack else UNDEFINED
521-            self.call_stack.pop()
522-            if self.call_stack:
523-                self.stack.append(result)
524-            else:
525-                self.stack.append(result)
526-
527-        elif op == OpCode.RETURN_UNDEFINED:
528-            self.call_stack.pop()
529-            if self.call_stack:
530-                self.stack.append(UNDEFINED)
531-            else:
532-                self.stack.append(UNDEFINED)
533-
534-        # Object operations
535-        elif op == OpCode.NEW:
536-            self._new_object(arg)

    30→    func: CompiledFunction
    31→    ip: int  # Instruction pointer
    32→    bp: int  # Base pointer (stack base for this frame)
    33→    locals: List[JSValue]
    34→    this_value: JSValue
    35→    closure_cells: List[ClosureCell] = None  # Cells for captured variables (from outer function)
    36→    cell_storage: List[ClosureCell] = None  # Cells for variables captured by inner functions
    37→
    38→
    39→class ForInIterator:
    40→    """Iterator for for-in loops."""
    41→    def __init__(self, keys: List[str]):
    42→        self.keys = keys
    43→        self.index = 0
    44→
    45→    def next(self) -> Tuple[Optional[str], bool]:
    46→        """Return (key, done)."""
    47→        if self.index >= len(self.keys):
    48→            return None, True
    49→        key = self.keys[self.index]

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    26→
    27→@dataclass
    28→class CallFrame:
    29→    """Call frame on the call stack."""
    30→    func: CompiledFunction
    31→    ip: int  # Instruction pointer
    32→    bp: int  # Base pointer (stack base for this frame)
    33→    locals: List[JSValue]
    34→    this_value: JSValue
    35→    closure_cells: List[ClosureCell] = None  # Cells for captured variables (from outer function)
    36→    cell_storage: List[ClosureCell] = None  # Cells for variables captured by inner functions
    37→    is_constructor_call: bool = False  # True if this frame is from a "new" call
    38→    new_target: JSValue = None  # The new object for constructor calls
    39→
    40→
    41→class ForInIterator:
    42→    """Iterator for for-in loops."""

   519→            self._call_method(method, this_val, args)
   520→
   521→        elif op == OpCode.RETURN:
   522→            result = self.stack.pop() if self.stack else UNDEFINED
   523→            self.call_stack.pop()
   524→            if self.call_stack:
   525→                self.stack.append(result)
   526→            else:
   527→                self.stack.append(result)
   528→
   529→        elif op == OpCode.RETURN_UNDEFINED:
   530→            self.call_stack.pop()
   531→            if self.call_stack:
   532→                self.stack.append(UNDEFINED)
   533→            else:
   534→                self.stack.append(UNDEFINED)
   535→
   536→        # Object operations
   537→        elif op == OpCode.NEW:
   538→            self._new_object(arg)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   517→            method = self.stack.pop()
   518→            this_val = self.stack.pop()
   519→            self._call_method(method, this_val, args)
   520→
   521→        elif op == OpCode.RETURN:
   522→            result = self.stack.pop() if self.stack else UNDEFINED
   523→            popped_frame = self.call_stack.pop()
   524→            # For constructor calls, return the new object unless result is an object
   525→            if popped_frame.is_constructor_call:
   526→                if not isinstance(result, JSObject):
   527→                    result = popped_frame.new_target
   528→            self.stack.append(result)
   529→
   530→        elif op == OpCode.RETURN_UNDEFINED:
   531→            popped_frame = self.call_stack.pop()
   532→            # For constructor calls, return the new object
   533→            if popped_frame.is_constructor_call:
   534→                self.stack.append(popped_frame.new_target)
   535→            else:
   536→                self.stack.append(UNDEFINED)
   537→
   538→        # Object operations
   539→        elif op == OpCode.NEW:
   540→            self._new_object(arg)

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1640→            cell_storage=cell_storage,
  1641→        )
  1642→        self.call_stack.append(frame)
  1643→
  1644→    def _new_object(self, arg_count: int) -> None:
  1645→        """Create a new object with constructor."""
  1646→        args = []
  1647→        for _ in range(arg_count):
  1648→            args.insert(0, self.stack.pop())
  1649→        constructor = self.stack.pop()
  1650→
  1651→        if isinstance(constructor, JSFunction):
  1652→            # Create new object
  1653→            obj = JSObject()
  1654→            # Set prototype from constructor's prototype property
  1655→            if hasattr(constructor, '_prototype'):
  1656→                obj._prototype = constructor._prototype
  1657→            # Call constructor with new object as 'this'
  1658→            # Mark this as a constructor call so RETURN knows to return the object
  1659→            self._invoke_js_function(constructor, args, obj, is_constructor=True, new_target=obj)
  1660→            # Don't push obj here - RETURN/RETURN_UNDEFINED will handle it
  1661→        elif isinstance(constructor, JSObject) and hasattr(constructor, '_call_fn'):
  1662→            # Built-in constructor (like Object, Array, RegExp)
  1663→            result = constructor._call_fn(*args)
  1664→            self.stack.append(result)
  1665→        else:
  1666→            raise JSTypeError(f"{constructor} is not a constructor")
  1667→
  1668→    def _throw(self, exc: JSValue) -> None:
  1669→        """Throw an exception."""
  1670→        if self.exception_handlers:

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1573→            return result if result is not None else UNDEFINED
  1574→        else:
  1575→            raise JSTypeError(f"{callback} is not a function")
  1576→
  1577→    def _invoke_js_function(
  1578→        self,
  1579→        func: JSFunction,
  1580→        args: List[JSValue],
  1581→        this_val: JSValue,
  1582→        is_constructor: bool = False,
  1583→        new_target: JSValue = None,
  1584→    ) -> None:
  1585→        """Invoke a JavaScript function."""
  1586→        # Handle bound functions
  1587→        if hasattr(func, '_bound_this'):
  1588→            this_val = func._bound_this

  1625→            cell_storage = []
  1626→            for var_name in compiled.cell_vars:
  1627→                # Find the initial value from locals
  1628→                if var_name in compiled.locals:
  1629→                    slot = compiled.locals.index(var_name)
  1630→                    cell_storage.append(ClosureCell(locals_list[slot]))
  1631→                else:
  1632→                    cell_storage.append(ClosureCell(UNDEFINED))
  1633→
  1634→        # Create new call frame
  1635→        frame = CallFrame(
  1636→            func=compiled,
  1637→            ip=0,
  1638→            bp=len(self.stack),
  1639→            locals=locals_list,
  1640→            this_value=this_val,
  1641→            closure_cells=closure_cells,
  1642→            cell_storage=cell_storage,
  1643→        )
  1644→        self.call_stack.append(frame)
  1645→
  1646→    def _new_object(self, arg_count: int) -> None:
  1647→        """Create a new object with constructor."""
  1648→        args = []
  1649→        for _ in range(arg_count):

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1630→                    cell_storage.append(ClosureCell(locals_list[slot]))
  1631→                else:
  1632→                    cell_storage.append(ClosureCell(UNDEFINED))
  1633→
  1634→        # Create new call frame
  1635→        frame = CallFrame(
  1636→            func=compiled,
  1637→            ip=0,
  1638→            bp=len(self.stack),
  1639→            locals=locals_list,
  1640→            this_value=this_val,
  1641→            closure_cells=closure_cells,
  1642→            cell_storage=cell_storage,
  1643→            is_constructor_call=is_constructor,
  1644→            new_target=new_target,
  1645→        )
  1646→        self.call_stack.append(frame)
  1647→
  1648→    def _new_object(self, arg_count: int) -> None:
  1649→        """Create a new object with constructor."""
  1650→        args = []

Result: 2

..                                                                       [ 42%]
tests/test_parser.py ................................................... [ 54%]
........                                                                 [ 56%]
tests/test_regex.py .................................................... [ 69%]
....................................                                     [ 78%]
tests/test_string_regex.py ...................                           [ 83%]
tests/test_vm.py ....................................................... [ 97%]
..........                                                               [100%]

======================== 394 passed, 5 xfailed in 4.57s ========================

FAILED: JSTypeError: TypeError: Right-hand side of instanceof is not callable

1 file changed, 41 insertions(+), 16 deletions(-)

479:        elif op == OpCode.INSTANCEOF:
480-            constructor = self.stack.pop()
481-            obj = self.stack.pop()
482-            # Simplified instanceof
483-            if not isinstance(constructor, JSFunction):
484-                raise JSTypeError("Right-hand side of instanceof is not callable")
485-            self.stack.append(isinstance(obj, JSObject))
486-
487-        elif op == OpCode.IN:
488-            obj = self.stack.pop()
489-            key = self.stack.pop()
490-            if not isinstance(obj, JSObject):
491-                raise JSTypeError("Cannot use 'in' operator on non-object")
492-            key_str = to_string(key)
493-            self.stack.append(obj.has(key_str))
494-
495-        # Control flow
496-        elif op == OpCode.JUMP:
497-            frame.ip = arg
498-
499-        elif op == OpCode.JUMP_IF_FALSE:

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   475→        elif op == OpCode.TYPEOF:
   476→            a = self.stack.pop()
   477→            self.stack.append(js_typeof(a))
   478→
   479→        elif op == OpCode.INSTANCEOF:
   480→            constructor = self.stack.pop()
   481→            obj = self.stack.pop()
   482→            # Check if constructor is callable
   483→            if not (isinstance(constructor, JSFunction) or
   484→                    (isinstance(constructor, JSObject) and hasattr(constructor, '_call_fn'))):
   485→                raise JSTypeError("Right-hand side of instanceof is not callable")
   486→
   487→            # Check prototype chain
   488→            if not isinstance(obj, JSObject):
   489→                self.stack.append(False)
   490→            else:
   491→                # Get constructor's prototype property
   492→                if isinstance(constructor, JSFunction) and hasattr(constructor, '_prototype'):
   493→                    proto = constructor._prototype
   494→                elif isinstance(constructor, JSObject) and hasattr(constructor, '_prototype'):
   495→                    proto = constructor._prototype
   496→                else:
   497→                    proto = constructor.get("prototype") if isinstance(constructor, JSObject) else None
   498→
   499→                # Walk the prototype chain
   500→                result = False
   501→                current = getattr(obj, '_prototype', None)
   502→                while current is not None:
   503→                    if current is proto:
   504→                        result = True
   505→                        break
   506→                    current = getattr(current, '_prototype', None)
   507→                self.stack.append(result)
   508→
   509→        elif op == OpCode.IN:
   510→            obj = self.stack.pop()
   511→            key = self.stack.pop()

Result: False

65:    "JSFunction",
66-]
67-
68-
69-def is_nan(value: Any) -> bool:
70-    """Check if value is NaN."""
71-    return isinstance(value, float) and math.isnan(value)
72-
73-
74-def is_infinity(value: Any) -> bool:
75-    """Check if value is positive or negative infinity."""
--
91:    if isinstance(value, JSFunction):
92-        return "function"
93-    if isinstance(value, JSObject):
94-        return "object"
95-    return "undefined"
96-
97-
98-def to_boolean(value: JSValue) -> bool:
99-    """Convert a JavaScript value to boolean."""
100-    if value is UNDEFINED or value is NULL:
101-        return False
--
301:class JSFunction:
302-    """JavaScript function (closure)."""
303-
304-    def __init__(
305-        self,
306-        name: str,
307-        params: List[str],
308-        bytecode: bytes,
309-        closure_vars: Optional[Dict[str, JSValue]] = None,
310-    ):
311-        self.name = name

   301→class JSFunction:
   302→    """JavaScript function (closure)."""
   303→
   304→    def __init__(
   305→        self,
   306→        name: str,
   307→        params: List[str],
   308→        bytecode: bytes,
   309→        closure_vars: Optional[Dict[str, JSValue]] = None,
   310→    ):
   311→        self.name = name
   312→        self.params = params
   313→        self.bytecode = bytecode
   314→        self.closure_vars = closure_vars or {}
   315→
   316→    def __repr__(self) -> str:
   317→        return f"[Function: {self.name}]" if self.name else "[Function (anonymous)]"
   318→
   319→
   320→class JSRegExp(JSObject):
   321→    """JavaScript RegExp object."""
   322→
   323→    def __init__(self, pattern: str, flags: str = "", poll_callback=None):
   324→        super().__init__()
   325→        from .regex import RegExp as InternalRegExp, MatchResult
   326→
   327→        self._internal = InternalRegExp(pattern, flags, poll_callback)
   328→        self._pattern = pattern
   329→        self._flags = flags
   330→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

No matches found

No matches found

155:                OpCode.LOAD_CLOSURE, OpCode.STORE_CLOSURE,
156-                OpCode.LOAD_CELL, OpCode.STORE_CELL,
157-                OpCode.CALL, OpCode.CALL_METHOD, OpCode.NEW,
158-                OpCode.BUILD_ARRAY, OpCode.BUILD_OBJECT, OpCode.BUILD_REGEX,
159:                OpCode.MAKE_CLOSURE,
160-            ):
161-                arg = bytecode[frame.ip]
162-                frame.ip += 1
163-
164-            # Execute opcode
165-            self._execute_opcode(op, arg, frame)
166-
167-            # Check if frame was popped (return)
168-            if not self.call_stack:
169-                break
--
246:        elif op == OpCode.LOAD_CLOSURE:
247-            if frame.closure_cells and arg < len(frame.closure_cells):
248-                self.stack.append(frame.closure_cells[arg].value)
249-            else:
250-                raise JSReferenceError("Closure variable not found")
251-
252:        elif op == OpCode.STORE_CLOSURE:
253-            if frame.closure_cells and arg < len(frame.closure_cells):
254-                frame.closure_cells[arg].value = self.stack[-1]
255-            else:
256-                raise JSReferenceError("Closure variable not found")
257-
258-        elif op == OpCode.LOAD_CELL:
259-            if frame.cell_storage and arg < len(frame.cell_storage):
260-                self.stack.append(frame.cell_storage[arg].value)
261-            else:
262-                raise JSReferenceError("Cell variable not found")
--
649:        elif op == OpCode.MAKE_CLOSURE:
650-            compiled_func = self.stack.pop()
651-            if isinstance(compiled_func, CompiledFunction):
652-                js_func = JSFunction(
653-                    name=compiled_func.name,
654-                    params=compiled_func.params,
655-                    bytecode=compiled_func.bytecode,
656-                )
657-                js_func._compiled = compiled_func
658-
659-                # Capture closure cells for free variables
--
1578:                    OpCode.LOAD_CLOSURE, OpCode.STORE_CLOSURE,
1579-                    OpCode.LOAD_CELL, OpCode.STORE_CELL,
1580-                    OpCode.CALL, OpCode.CALL_METHOD, OpCode.NEW,
1581-                    OpCode.BUILD_ARRAY, OpCode.BUILD_OBJECT, OpCode.BUILD_REGEX,
1582:                    OpCode.MAKE_CLOSURE,
1583-                ):
1584-                    arg = bytecode[frame.ip]
1585-                    frame.ip += 1
1586-
1587-                self._execute_opcode(op, arg, frame)
1588-
1589-            # Get result from stack
1590-            if len(self.stack) > stack_len:
1591-                return self.stack.pop()
1592-            return UNDEFINED

   649→        elif op == OpCode.MAKE_CLOSURE:
   650→            compiled_func = self.stack.pop()
   651→            if isinstance(compiled_func, CompiledFunction):
   652→                js_func = JSFunction(
   653→                    name=compiled_func.name,
   654→                    params=compiled_func.params,
   655→                    bytecode=compiled_func.bytecode,
   656→                )
   657→                js_func._compiled = compiled_func
   658→
   659→                # Capture closure cells for free variables
   660→                if compiled_func.free_vars:
   661→                    closure_cells = []
   662→                    for var_name in compiled_func.free_vars:
   663→                        # First check if it's in our cell_storage (cell var)
   664→                        if frame.cell_storage and var_name in getattr(frame.func, 'cell_vars', []):
   665→                            idx = frame.func.cell_vars.index(var_name)
   666→                            # Share the same cell!
   667→                            closure_cells.append(frame.cell_storage[idx])
   668→                        elif frame.closure_cells and var_name in getattr(frame.func, 'free_vars', []):
   669→                            # Variable is in our own closure
   670→                            idx = frame.func.free_vars.index(var_name)
   671→                            closure_cells.append(frame.closure_cells[idx])
   672→                        elif var_name in frame.func.locals:
   673→                            # Regular local - shouldn't happen if cell_vars is working
   674→                            slot = frame.func.locals.index(var_name)
   675→                            cell = ClosureCell(frame.locals[slot])
   676→                            closure_cells.append(cell)
   677→                        else:
   678→                            closure_cells.append(ClosureCell(UNDEFINED))
   679→                    js_func._closure_cells = closure_cells
   680→
   681→                self.stack.append(js_func)
   682→            else:
   683→                self.stack.append(compiled_func)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   645→            a = self.stack.pop()
   646→            self.stack.append(to_number(a) - 1)
   647→
   648→        # Closures
   649→        elif op == OpCode.MAKE_CLOSURE:
   650→            compiled_func = self.stack.pop()
   651→            if isinstance(compiled_func, CompiledFunction):
   652→                js_func = JSFunction(
   653→                    name=compiled_func.name,
   654→                    params=compiled_func.params,
   655→                    bytecode=compiled_func.bytecode,
   656→                )
   657→                js_func._compiled = compiled_func
   658→
   659→                # Create prototype object for the function
   660→                # In JavaScript, every function has a prototype property
   661→                prototype = JSObject()
   662→                prototype.set("constructor", js_func)
   663→                js_func._prototype = prototype
   664→
   665→                # Capture closure cells for free variables
   666→                if compiled_func.free_vars:
   667→                    closure_cells = []
   668→                    for var_name in compiled_func.free_vars:
   669→                        # First check if it's in our cell_storage (cell var)
   670→                        if frame.cell_storage and var_name in getattr(frame.func, 'cell_vars', []):
   671→                            idx = frame.func.cell_vars.index(var_name)
   672→                            # Share the same cell!
   673→                            closure_cells.append(frame.cell_storage[idx])
   674→                        elif frame.closure_cells and var_name in getattr(frame.func, 'free_vars', []):
   675→                            # Variable is in our own closure
   676→                            idx = frame.func.free_vars.index(var_name)
   677→                            closure_cells.append(frame.closure_cells[idx])
   678→                        elif var_name in frame.func.locals:
   679→                            # Regular local - shouldn't happen if cell_vars is working
   680→                            slot = frame.func.locals.index(var_name)
   681→                            cell = ClosureCell(frame.locals[slot])
   682→                            closure_cells.append(cell)
   683→                        else:
   684→                            closure_cells.append(ClosureCell(UNDEFINED))
   685→                    js_func._closure_cells = closure_cells
   686→
   687→                self.stack.append(js_func)
   688→            else:
   689→                self.stack.append(compiled_func)
   690→
   691→        else:
   692→            raise NotImplementedError(f"Opcode not implemented: {op.name}")
   693→

Result: True

..                                                                       [ 42%]
tests/test_parser.py ................................................... [ 54%]
........                                                                 [ 56%]
tests/test_regex.py .................................................... [ 69%]
....................................                                     [ 78%]
tests/test_string_regex.py ...................                           [ 83%]
tests/test_vm.py ....................................................... [ 97%]
..........                                                               [100%]

======================== 394 passed, 5 xfailed in 4.67s ========================

FAILED: JSError: Error: assertion failed: got boolean:|false|, expected boolean:|true| (instanceof Object)

FAIL: ({}) instanceof Object = False, expected True
FAIL: [] instanceof Array = False, expected True
FAIL: (new Object()) instanceof Object = False, expected True

    83→    def _create_object_constructor(self) -> JSCallableObject:
    84→        """Create the Object constructor with static methods."""
    85→        # Constructor function - new Object() creates empty object
    86→        def object_constructor(*args):
    87→            return JSObject()
    88→
    89→        # Create a callable object that acts as constructor
    90→        obj_constructor = JSCallableObject(object_constructor)
    91→
    92→        def keys_fn(*args):
    93→            obj = args[0] if args else UNDEFINED
    94→            if not isinstance(obj, JSObject):
    95→                return JSArray()
    96→            arr = JSArray()
    97→            arr._elements = list(obj.keys())
    98→            return arr
    99→
   100→        def values_fn(*args):
   101→            obj = args[0] if args else UNDEFINED
   102→            if not isinstance(obj, JSObject):
   103→                return JSArray()
   104→            arr = JSArray()
   105→            arr._elements = [obj.get(k) for k in obj.keys()]
   106→            return arr
   107→
   108→        def entries_fn(*args):
   109→            obj = args[0] if args else UNDEFINED
   110→            if not isinstance(obj, JSObject):
   111→                return JSArray()
   112→            arr = JSArray()

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/context.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    79→    def _console_log(self, *args: JSValue) -> None:
    80→        """Console.log implementation."""
    81→        print(" ".join(to_string(arg) for arg in args))
    82→
    83→    def _create_object_constructor(self) -> JSCallableObject:
    84→        """Create the Object constructor with static methods."""
    85→        # Create Object.prototype first
    86→        object_prototype = JSObject()
    87→
    88→        # Constructor function - new Object() creates empty object
    89→        def object_constructor(*args):
    90→            obj = JSObject()
    91→            obj._prototype = object_prototype
    92→            return obj
    93→
    94→        # Create a callable object that acts as constructor
    95→        obj_constructor = JSCallableObject(object_constructor)
    96→        obj_constructor._prototype = object_prototype
    97→        object_prototype.set("constructor", obj_constructor)
    98→
    99→        # Store for other constructors to use
   100→        self._object_prototype = object_prototype
   101→
   102→        def keys_fn(*args):
   103→            obj = args[0] if args else UNDEFINED
   104→            if not isinstance(obj, JSObject):

   145→        obj_constructor.set("entries", entries_fn)
   146→        obj_constructor.set("assign", assign_fn)
   147→
   148→        return obj_constructor
   149→
   150→    def _create_array_constructor(self) -> JSCallableObject:
   151→        """Create the Array constructor with static methods."""
   152→        def array_constructor(*args):
   153→            if len(args) == 1 and isinstance(args[0], (int, float)):
   154→                return JSArray(int(args[0]))
   155→            arr = JSArray()
   156→            for arg in args:
   157→                arr.push(arg)
   158→            return arr
   159→
   160→        arr_constructor = JSCallableObject(array_constructor)
   161→
   162→        # Array.isArray()
   163→        def is_array(*args):
   164→            obj = args[0] if args else UNDEFINED
   165→            return isinstance(obj, JSArray)
   166→
   167→        arr_constructor.set("isArray", is_array)
   168→
   169→        return arr_constructor

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

    40→        self._globals["console"] = console
    41→
    42→        # Infinity and NaN
    43→        self._globals["Infinity"] = float("inf")
    44→        self._globals["NaN"] = float("nan")
    45→        self._globals["undefined"] = UNDEFINED
    46→
    47→        # Basic type constructors (minimal implementations)
    48→        self._globals["Object"] = self._create_object_constructor()
    49→        self._globals["Array"] = self._create_array_constructor()
    50→        self._globals["Error"] = self._error_constructor
    51→
    52→        # Math object
    53→        self._globals["Math"] = self._create_math_object()
    54→
    55→        # JSON object
    56→        self._globals["JSON"] = self._create_json_object()
    57→
    58→        # Number constructor and methods
    59→        self._globals["Number"] = self._create_number_constructor()
    60→
    61→        # String constructor and methods
    62→        self._globals["String"] = self._create_string_constructor()
    63→
    64→        # Boolean constructor
    65→        self._globals["Boolean"] = self._create_boolean_constructor()
    66→
    67→        # Date constructor
    68→        self._globals["Date"] = self._create_date_constructor()
    69→
    70→        # RegExp constructor
    71→        self._globals["RegExp"] = self._create_regexp_constructor()
    72→
    73→        # Global number functions
    74→        self._globals["isNaN"] = self._global_isnan
    75→        self._globals["isFinite"] = self._global_isfinite
    76→        self._globals["parseInt"] = self._global_parseint
    77→        self._globals["parseFloat"] = self._global_parsefloat
    78→
    79→    def _console_log(self, *args: JSValue) -> None:

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

The file /home/user/mquickjs-python/src/mquickjs_python/context.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   146→        obj_constructor.set("assign", assign_fn)
   147→
   148→        return obj_constructor
   149→
   150→    def _create_array_constructor(self) -> JSCallableObject:
   151→        """Create the Array constructor with static methods."""
   152→        # Create Array.prototype (inherits from Object.prototype)
   153→        array_prototype = JSArray()
   154→        array_prototype._prototype = self._object_prototype
   155→
   156→        def array_constructor(*args):
   157→            if len(args) == 1 and isinstance(args[0], (int, float)):
   158→                arr = JSArray(int(args[0]))
   159→            else:
   160→                arr = JSArray()
   161→                for arg in args:
   162→                    arr.push(arg)
   163→            arr._prototype = array_prototype
   164→            return arr
   165→
   166→        arr_constructor = JSCallableObject(array_constructor)
   167→        arr_constructor._prototype = array_prototype
   168→        array_prototype.set("constructor", arr_constructor)
   169→
   170→        # Store for other uses
   171→        self._array_prototype = array_prototype
   172→
   173→        # Array.isArray()
   174→        def is_array(*args):
   175→            obj = args[0] if args else UNDEFINED
   176→            return isinstance(obj, JSArray)
   177→
   178→        arr_constructor.set("isArray", is_array)
   179→
   180→        return arr_constructor
   181→
   182→    def _error_constructor(self, message: JSValue = UNDEFINED) -> JSObject:
   183→        """Error constructor."""
   184→        err = JSObject()

158:                OpCode.BUILD_ARRAY, OpCode.BUILD_OBJECT, OpCode.BUILD_REGEX,
159-                OpCode.MAKE_CLOSURE,
160-            ):
161-                arg = bytecode[frame.ip]
162-                frame.ip += 1
163-
164-            # Execute opcode
165-            self._execute_opcode(op, arg, frame)
166-
167-            # Check if frame was popped (return)
168-            if not self.call_stack:
169-                break
170-
171-        return self.stack.pop() if self.stack else UNDEFINED
172-
173-    def _execute_opcode(self, op: OpCode, arg: Optional[int], frame: CallFrame) -> None:
174-        """Execute a single opcode."""
175-
176-        # Stack operations
177-        if op == OpCode.POP:
178-            if self.stack:
--
298:        elif op == OpCode.BUILD_OBJECT:
299-            obj = JSObject()
300-            props = []
301-            for _ in range(arg):
302-                value = self.stack.pop()
303-                kind = self.stack.pop()
304-                key = self.stack.pop()
305-                props.insert(0, (key, kind, value))
306-            for key, kind, value in props:
307-                key_str = to_string(key) if not isinstance(key, str) else key
308-                if kind == "get":
309-                    obj.define_getter(key_str, value)
310-                elif kind == "set":
311-                    obj.define_setter(key_str, value)
312-                else:
313-                    obj.set(key_str, value)
314-            self.stack.append(obj)
315-
316-        elif op == OpCode.BUILD_REGEX:
317-            pattern, flags = frame.func.constants[arg]
318-            regex = JSRegExp(pattern, flags)
--
1587:                    OpCode.BUILD_ARRAY, OpCode.BUILD_OBJECT, OpCode.BUILD_REGEX,
1588-                    OpCode.MAKE_CLOSURE,
1589-                ):
1590-                    arg = bytecode[frame.ip]
1591-                    frame.ip += 1
1592-
1593-                self._execute_opcode(op, arg, frame)
1594-
1595-            # Get result from stack
1596-            if len(self.stack) > stack_len:
1597-                return self.stack.pop()
1598-            return UNDEFINED
1599-        elif callable(callback):
1600-            result = callback(*args)
1601-            return result if result is not None else UNDEFINED
1602-        else:
1603-            raise JSTypeError(f"{callback} is not a function")
1604-
1605-    def _invoke_js_function(
1606-        self,
1607-        func: JSFunction,

71:class VM:
72-    """JavaScript virtual machine."""
73-
74-    def __init__(
75-        self,
76-        memory_limit: Optional[int] = None,
77-        time_limit: Optional[float] = None,
78-    ):
79-        self.memory_limit = memory_limit
80-        self.time_limit = time_limit
81-
82-        self.stack: List[JSValue] = []
83-        self.call_stack: List[CallFrame] = []
84-        self.globals: Dict[str, JSValue] = {}
85-
86-        self.start_time: Optional[float] = None

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   294→            arr = JSArray()
   295→            arr._elements = elements
   296→            self.stack.append(arr)
   297→
   298→        elif op == OpCode.BUILD_OBJECT:
   299→            obj = JSObject()
   300→            # Set prototype from Object constructor
   301→            object_constructor = self.globals.get("Object")
   302→            if object_constructor and hasattr(object_constructor, '_prototype'):
   303→                obj._prototype = object_constructor._prototype
   304→            props = []
   305→            for _ in range(arg):
   306→                value = self.stack.pop()
   307→                kind = self.stack.pop()
   308→                key = self.stack.pop()
   309→                props.insert(0, (key, kind, value))
   310→            for key, kind, value in props:
   311→                key_str = to_string(key) if not isinstance(key, str) else key
   312→                if kind == "get":
   313→                    obj.define_getter(key_str, value)
   314→                elif kind == "set":
   315→                    obj.define_setter(key_str, value)
   316→                else:
   317→                    obj.set(key_str, value)
   318→            self.stack.append(obj)
   319→
   320→        elif op == OpCode.BUILD_REGEX:
   321→            pattern, flags = frame.func.constants[arg]
   322→            regex = JSRegExp(pattern, flags)

The file /home/user/mquickjs-python/src/mquickjs_python/vm.py has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   286→            result = self._delete_property(obj, key)
   287→            self.stack.append(result)
   288→
   289→        # Arrays/Objects
   290→        elif op == OpCode.BUILD_ARRAY:
   291→            elements = []
   292→            for _ in range(arg):
   293→                elements.insert(0, self.stack.pop())
   294→            arr = JSArray()
   295→            arr._elements = elements
   296→            # Set prototype from Array constructor
   297→            array_constructor = self.globals.get("Array")
   298→            if array_constructor and hasattr(array_constructor, '_prototype'):
   299→                arr._prototype = array_constructor._prototype
   300→            self.stack.append(arr)
   301→
   302→        elif op == OpCode.BUILD_OBJECT:
   303→            obj = JSObject()
   304→            # Set prototype from Object constructor

PASS: ({}) instanceof Object = True
PASS: [] instanceof Array = True
PASS: (new Object()) instanceof Object = True