Bug 220465 – REGRESSION: Unchecked JS exception: getOwnNonIndexPropertyNames @ ./runtime/JSObject.cpp:2494

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Ryan Haddad]

Seeing the following on the debug JSC bot with modules.yaml/modules/module-namespace-is-frozen.js and modules.yaml/modules/namespace.js

ERROR: Unchecked JS exception:
    This scope can throw a JS exception: getOwnNonIndexPropertyNames @ ./runtime/JSObject.cpp:2494
        (ExceptionScope::m_recursionDepth was 8)
    But the exception was unchecked as of this scope: getOwnPropertyNames @ ./runtime/JSModuleNamespaceObject.cpp:223
        (ExceptionScope::m_recursionDepth was 7)

Unchecked exception detected at:
    1   0x10af03bce JSC::VM::verifyExceptionCheckNeedIsSatisfied(unsigned int, JSC::ExceptionEventLocation&)
    2   0x10aedbcaf JSC::ThrowScope::~ThrowScope()
    3   0x10aedbea5 JSC::ThrowScope::~ThrowScope()
    4   0x10ad13a1a JSC::JSModuleNamespaceObject::getOwnPropertyNames(JSC::JSObject*, JSC::JSGlobalObject*, JSC::PropertyNameArray&, JSC::DontEnumPropertiesMode)
    5   0x10adf3a5a bool JSC::testIntegrityLevel<(JSC::IntegrityLevel)1>(JSC::JSGlobalObject*, JSC::VM&, JSC::JSObject*)
    6   0x10adf12c8 JSC::objectConstructorIsFrozen(JSC::JSGlobalObject*, JSC::CallFrame*)
    7   0x31d915a01178
    8   0x109894ee2 llint_entry
    9   0x109894ee2 llint_entry
    10  0x109894ee2 llint_entry
    11  0x109873770 vmEntryToJavaScript
    12  0x10a75ffab JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
    13  0x10a7622a5 JSC::Interpreter::executeModuleProgram(JSC::ModuleProgramExecutable*, JSC::JSGlobalObject*, JSC::JSModuleEnvironment*)
    14  0x10ad259d9 JSC::JSModuleRecord::evaluate(JSC::JSGlobalObject*)
    15  0x10aa57c9e JSC::AbstractModuleRecord::evaluate(JSC::JSGlobalObject*)
    16  0x10ad12f85 JSC::JSModuleLoader::evaluateNonVirtual(JSC::JSGlobalObject*, JSC::JSValue, JSC::JSValue, JSC::JSValue)
    17  0x10ad12eda JSC::JSModuleLoader::evaluate(JSC::JSGlobalObject*, JSC::JSValue, JSC::JSValue, JSC::JSValue)
    18  0x10ad17aed JSC::moduleLoaderEvaluate(JSC::JSGlobalObject*, JSC::CallFrame*)
    19  0x31d915a01178
    20  0x109894e3a llint_entry
    21  0x31d915a0a687
    22  0x31d915a20c35
    23  0x31d915a1ac5e
    24  0x31d915a1b34a
    25  0x31d915a1f1c9
    26  0x109873770 vmEntryToJavaScript
    27  0x10a75ffab JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
    28  0x10a760767 JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
    29  0x10aacc1dd JSC::call(JSC::JSGlobalObject*, JSC::JSValue, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
    30  0x10aacc4b3 JSC::profiledCall(JSC::JSGlobalObject*, JSC::ProfilingReason, JSC::JSValue, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
    31  0x10ad0f411 JSC::JSMicrotask::run(JSC::JSGlobalObject*)
    32  0x10af03803 JSC::QueuedTask::run()
    33  0x10af03691 JSC::VM::drainMicrotasks()
    34  0x1084c2a73 runWithOptions(GlobalObject*, CommandLine&, bool&)
    35  0x10847e26a jscmain(int, char**)::$_8::operator()(JSC::VM&, GlobalObject*, bool&) const
    36  0x108452843 int runJSC<jscmain(int, char**)::$_8>(CommandLine const&, bool, jscmain(int, char**)::$_8 const&)
    37  0x1084502c2 jscmain(int, char**)
    38  0x10844fffe main
    39  0x7fff6e98ecc9 start
    40  0x14

https://build.webkit.org/builders/Apple-Catalina-Debug-JSC-Tests/builds/2148/steps/jscore-test/logs/stdio

[Radar WebKit Bug Importer]

<rdar://problem/72933753>

[Yusuke Suzuki]

Committed r271304: <https://trac.webkit.org/changeset/271304>