[Webkit-unassigned] [Bug 225528] New: [ BigSur ARM64] http/wpt/fetch/fetch-response-body-stop-in-worker.html is a flaky crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=225528

            Bug ID: 225528
           Summary: [ BigSur ARM64]
                    http/wpt/fetch/fetch-response-body-stop-in-worker.html
                    is a flaky crash
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Jenner at apple.com

http/wpt/fetch/fetch-response-body-stop-in-worker.html

is a flaky crash on BigSur Apple Silicon Macs only. So far, it has only crashed on BigSur Release wk2, and BigSur Debug wk1. But so far has only been on Apple Silicon Macs. 

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=http%2Fwpt%2Ffetch%2Ffetch-response-body-stop-in-worker.html

CRASH TEXT:
Thread 7 Crashed:: WebCore: Worker
0   com.apple.JavaScriptCore            0x000000010a7ce350 structure + 0 (JSCellInlines.h:141) [inlined]
1   com.apple.JavaScriptCore            0x000000010a7ce350 globalObject + 0 (JSObject.h:877) [inlined]
2   com.apple.JavaScriptCore            0x000000010a7ce350 JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 128 (Interpreter.cpp:865)
3   com.apple.JavaScriptCore            0x000000010a7ce318 isCollectorBusyOnCurrentThread + 8 (VM.h:1033) [inlined]
4   com.apple.JavaScriptCore            0x000000010a7ce318 JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 72 (Interpreter.cpp:851)
5   com.apple.WebCore                   0x0000000105a35fc8 invokeReadableStreamDefaultControllerFunction + 200 (ReadableStreamDefaultController.cpp:52) [inlined]
6   com.apple.WebCore                   0x0000000105a35fc8 WebCore::ReadableStreamDefaultController::enqueue(JSC::JSValue) + 412 (ReadableStreamDefaultController.cpp:105)
7   com.apple.WebCore                   0x0000000105a361b0 WebCore::ReadableStreamDefaultController::enqueue(WTF::RefPtr<JSC::ArrayBuffer, WTF::RawPtrTraits<JSC::ArrayBuffer>, WTF::DefaultRefDerefTraits<JSC::ArrayBuffer> >&&) + 344 (ReadableStreamDefaultController.cpp:128)
8   com.apple.WebCore                   0x000000010567cb90 enqueue + 20 (FetchBodySource.h:44) [inlined]
9   com.apple.WebCore                   0x000000010567cb90 WebCore::FetchResponse::BodyLoader::didReceiveData(char const*, unsigned long) + 312 (FetchResponse.cpp:373)
10  com.apple.WebCore                   0x000000010619b770 didReceiveData + 12 (ThreadableLoaderClientWrapper.h:72) [inlined]
11  com.apple.WebCore                   0x000000010619b770 operator() + 32 (WorkerThreadableLoader.cpp:238) [inlined]
12  com.apple.WebCore                   0x000000010619b770 WTF::Detail::CallableWrapper<WebCore::WorkerThreadableLoader::MainThreadBridge::didReceiveData(char const*, int)::$_17, void, WebCore::ScriptExecutionContext&>::call(WebCore::ScriptExecutionContext&) + 56 (Function.h:52)
13  com.apple.WebCore                   0x000000010696198c operator() + 20 (Function.h:83) [inlined]
14  com.apple.WebCore                   0x000000010696198c performTask + 20 (ScriptExecutionContext.h:203) [inlined]
15  com.apple.WebCore                   0x000000010696198c performTask + 36 (WorkerRunLoop.cpp:270) [inlined]
16  com.apple.WebCore                   0x000000010696198c WebCore::WorkerRunLoop::runInMode(WebCore::WorkerOrWorkletGlobalScope*, WebCore::ModePredicate const&, WebCore::WorkerRunLoop::WaitMode) + 392 (WorkerRunLoop.cpp:209)
17  com.apple.WebCore                   0x00000001069617a0 WebCore::WorkerRunLoop::run(WebCore::WorkerOrWorkletGlobalScope*) + 100 (WorkerRunLoop.cpp:143)
18  com.apple.WebCore                   0x000000010695d0ec WebCore::WorkerOrWorkletThread::workerOrWorkletThread() + 744 (WorkerOrWorkletThread.cpp:146)
19  com.apple.JavaScriptCore            0x0000000109f38338 operator() + 16 (Function.h:83) [inlined]
20  com.apple.JavaScriptCore            0x0000000109f38338 WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*) + 136 (Threading.cpp:185)
21  com.apple.JavaScriptCore            0x0000000109f3a6e8 WTF::wtfThreadEntryPoint(void*) + 12 (ThreadingPOSIX.cpp:241)
22  libsystem_pthread.dylib             0x000000018dc9606c _pthread_start + 320
23  libsystem_pthread.dylib             0x000000018dc90da0 thread_start + 8

https://build.webkit.org/results/Apple-BigSur-Release-AppleSilicon-WK2-Tests/r277174%20(1348)/http/wpt/fetch/fetch-response-body-stop-in-worker-crash-log.txt

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