RESOLVED FIXED304378
html/semantics/scripting-1/the-script-element/json-module/repeated-imports.any.sharedworker.html is a flaky crash in debug 
https://bugs.webkit.org/show_bug.cgi?id=304378
Summary html/semantics/scripting-1/the-script-element/json-module/repeated-imports.an...
Chris Dumez
Reported 2025-12-17 19:43:01 PST
html/semantics/scripting-1/the-script-element/json-module/repeated-imports.any.sharedworker.html is a flaky crash in debug: ``` Thread 5 Crashed:: WebCore: SharedWorker 0 WebCore 0x3002d4ab4 WTFCrashWithInfo(int, char const*, char const*, int) + 100 1 WebCore 0x30010cdf0 WebCore::ContextDestructionObserver::observeContext(WebCore::ScriptExecutionContext*) + 212 2 WebCore 0x3001233cc WebCore::ContextDestructionObserver::~ContextDestructionObserver() + 68 3 WebCore 0x305b23f98 WebCore::ActiveDOMCallback::~ActiveDOMCallback() + 32 4 WebCore 0x304de987c WebCore::DOMGuardedObject::~DOMGuardedObject() + 96 5 WebCore 0x300bf40dc WebCore::DOMGuarded<JSC::JSPromise>::~DOMGuarded() + 32 6 WebCore 0x300e255c0 WebCore::DeferredPromise::~DeferredPromise() + 32 7 WebCore 0x300e2555c WebCore::DeferredPromise::~DeferredPromise() + 32 8 WebCore 0x300e2558c WebCore::DeferredPromise::~DeferredPromise() + 32 9 WebCore 0x30089c1c4 WTF::RefCounted<WebCore::DOMGuardedObject>::deref() const + 100 10 WebCore 0x30089c154 WebCore::DOMGuardedObject::deref() const + 32 11 WebCore 0x30089c0f4 WTF::DefaultRefDerefTraits<WebCore::DeferredPromise>::derefIfNotNull(WebCore::DeferredPromise*) + 40 12 WebCore 0x30089c6c4 WTF::RefPtr<WebCore::DeferredPromise, WTF::RawPtrTraits<WebCore::DeferredPromise>, WTF::DefaultRefDerefTraits<WebCore::DeferredPromise>>::~RefPtr() + 44 13 WebCore 0x30089a47c WTF::RefPtr<WebCore::DeferredPromise, WTF::RawPtrTraits<WebCore::DeferredPromise>, WTF::DefaultRefDerefTraits<WebCore::DeferredPromise>>::~RefPtr() + 32 14 WebCore 0x304dc6154 WebCore::ModuleScriptLoader::~ModuleScriptLoader() + 92 15 WebCore 0x304ec08c0 WebCore::WorkerModuleScriptLoader::~WorkerModuleScriptLoader() + 120 16 WebCore 0x304ec0a1c WebCore::WorkerModuleScriptLoader::~WorkerModuleScriptLoader() + 32 17 WebCore 0x304ec0a68 WebCore::WorkerModuleScriptLoader::~WorkerModuleScriptLoader() + 32 18 WebCore 0x304e2ccd4 WTF::RefCounted<WebCore::ModuleScriptLoader>::deref() const + 100 19 WebCore 0x304fa2df0 WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>::derefIfNotNull(WebCore::ModuleScriptLoader*) + 44 20 WebCore 0x304fa2db0 WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>::~Ref() + 64 21 WebCore 0x304ea54c4 WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>::~Ref() + 32 22 WebCore 0x304ecfd08 WTF::HashTable<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>, WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTraits<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTraits<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::FastMalloc>::deallocateTable(WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>*) + 100 23 WebCore 0x304ecfbdc WTF::HashTable<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>, WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTraits<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTraits<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::FastMalloc>::~HashTable() + 68 24 WebCore 0x304ecfb88 WTF::HashTable<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>, WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTraits<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTraits<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::FastMalloc>::~HashTable() + 32 25 WebCore 0x304ecfb58 WTF::HashSet<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>, WTF::DefaultHash<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTraits<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTableTraits, (WTF::ShouldValidateKey)1>::~HashSet() + 32 26 WebCore 0x304ea37f4 WTF::HashSet<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>, WTF::DefaultHash<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTraits<WTF::Ref<WebCore::ModuleScriptLoader, WTF::RawPtrTraits<WebCore::ModuleScriptLoader>, WTF::DefaultRefDerefTraits<WebCore::ModuleScriptLoader>>>, WTF::HashTableTraits, (WTF::ShouldValidateKey)1>::~HashSet() + 32 27 WebCore 0x3000ba284 WebCore::ScriptModuleLoader::~ScriptModuleLoader() + 160 28 WebCore 0x304ea3868 WebCore::ScriptModuleLoader::~ScriptModuleLoader() + 32 29 WebCore 0x304ed01c8 std::__1::default_delete<WebCore::ScriptModuleLoader>::operator()[abi:sn210106](WebCore::ScriptModuleLoader*) const + 48 30 WebCore 0x304ed0188 std::__1::unique_ptr<WebCore::ScriptModuleLoader, std::__1::default_delete<WebCore::ScriptModuleLoader>>::reset[abi:sn210106](WebCore::ScriptModuleLoader*) + 72 31 WebCore 0x304ed0130 std::__1::unique_ptr<WebCore::ScriptModuleLoader, std::__1::default_delete<WebCore::ScriptModuleLoader>>::~unique_ptr[abi:sn210106]() + 36 32 WebCore 0x304ed00fc std::__1::unique_ptr<WebCore::ScriptModuleLoader, std::__1::default_delete<WebCore::ScriptModuleLoader>>::~unique_ptr[abi:sn210106]() + 32 33 WebCore 0x304ed00cc WTF::UniqueRef<WebCore::ScriptModuleLoader>::~UniqueRef() + 32 34 WebCore 0x304ea3a1c WTF::UniqueRef<WebCore::ScriptModuleLoader>::~UniqueRef() + 32 35 WebCore 0x308b8fc18 WebCore::WorkerOrWorkletGlobalScope::~WorkerOrWorkletGlobalScope() + 180 36 WebCore 0x308b8f8e0 WebCore::WorkerGlobalScope::~WorkerGlobalScope() + 856 37 WebCore 0x308e5ef90 WebCore::SharedWorkerGlobalScope::~SharedWorkerGlobalScope() + 52 38 WebCore 0x308e5efc0 WebCore::SharedWorkerGlobalScope::~SharedWorkerGlobalScope() + 32 39 WebCore 0x308e5f0ec WebCore::SharedWorkerGlobalScope::operator delete(WebCore::SharedWorkerGlobalScope*, std::destroying_delete_t, unsigned long) + 156 40 WebCore 0x308e5f044 WebCore::SharedWorkerGlobalScope::~SharedWorkerGlobalScope() + 32 41 WebCore 0x300ecf0c0 WTF::RefCounted<WebCore::WorkerOrWorkletGlobalScope>::deref() const + 96 42 WebCore 0x30407fe54 WTF::DefaultRefDerefTraits<WebCore::WorkerOrWorkletGlobalScope>::derefIfNotNull(WebCore::WorkerOrWorkletGlobalScope*) + 44 43 WebCore 0x308bd468c WTF::RefPtr<WebCore::WorkerOrWorkletGlobalScope, WTF::RawPtrTraits<WebCore::WorkerOrWorkletGlobalScope>, WTF::DefaultRefDerefTraits<WebCore::WorkerOrWorkletGlobalScope>>::operator=(std::nullptr_t) + 48 44 WebCore 0x308bd4534 WebCore::WorkerOrWorkletThread::destroyWorkerGlobalScope(WTF::Ref<WebCore::WorkerOrWorkletThread, WTF::RawPtrTraits<WebCore::WorkerOrWorkletThread>, WTF::DefaultRefDerefTraits<WebCore::WorkerOrWorkletThread>>&&) + 456 45 WebCore 0x308bd3ea8 WebCore::WorkerOrWorkletThread::workerOrWorkletThread() + 1056 46 WebCore 0x308c069bc WebCore::WorkerThread::createThread()::$_1::operator()() const + 32 47 WebCore 0x308c06960 WTF::Detail::CallableWrapper<WebCore::WorkerThread::createThread()::$_1, void>::call() + 32 48 JavaScriptCore 0x12d776850 WTF::Function<void ()>::operator()() const + 176 49 JavaScriptCore 0x12d5cbd40 WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*) + 336 50 JavaScriptCore 0x12d6aa408 WTF::wtfThreadEntryPoint(void*) + 28 51 libsystem_pthread.dylib 0x189f09c58 _pthread_start + 136 52 libsystem_pthread.dylib 0x189f04c1c thread_start + 8 ```
Attachments
Add attachment proposed patch, testcase, etc.
Chris Dumez
Comment 1 2025-12-17 19:43:11 PST
<rdar://162879256>
Chris Dumez
Comment 2 2025-12-17 19:47:51 PST
Pull request: https://github.com/WebKit/WebKit/pull/55604
EWS
Comment 3 2025-12-18 21:15:54 PST
Committed 304727@main (5ab99ca27efb): <https://commits.webkit.org/304727@main> Reviewed commits have been landed. Closing PR #55604 and removing active labels.
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