[Webkit-unassigned] [Bug 152436] New: imported/w3c/web-platform-tests/streams-api/readable-streams/garbage-collection.html asserts frequently

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152436

            Bug ID: 152436
           Summary: imported/w3c/web-platform-tests/streams-api/readable-s
                    treams/garbage-collection.html asserts frequently
    Classification: Unclassified
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ap at webkit.org
                CC: calvaris at igalia.com, youennf at gmail.com

imported/w3c/web-platform-tests/streams-api/readable-streams/garbage-collection.html frequently crashes on debug WebKit1 bots: https://build.webkit.org/results/Apple%20Yosemite%20Debug%20WK1%20(Tests)/r194278%20(9621)/imported/w3c/web-platform-tests/streams-api/readable-streams/garbage-collection-crash-log.txt

<rdar://23926702>

Thread 35 Crashed:: WebCore: Worker
0   com.apple.JavaScriptCore          0x000000010f6008f7 WTFCrash + 39
1   com.apple.WebCore                 0x0000000114f7a68f WebCore::JSGlobalObjectCallback::call() + 351 (JSDOMGlobalObjectTask.cpp:67)
2   com.apple.WebCore                 0x0000000114f79f91 WebCore::JSGlobalObjectTask::JSGlobalObjectTask(WebCore::JSDOMGlobalObject*, WTF::PassRefPtr<JSC::Microtask>)::$_0::operator()(WebCore::ScriptExecutionContext&) const + 33 (JSDOMGlobalObjectTask.cpp:88)
3   com.apple.WebCore                 0x0000000114f79f5c std::__1::__function::__func<WebCore::JSGlobalObjectTask::JSGlobalObjectTask(WebCore::JSDOMGlobalObject*, WTF::PassRefPtr<JSC::Microtask>)::$_0, std::__1::allocator<WebCore::JSGlobalObjectTask::JSGlobalObjectTask(WebCore::JSDOMGlobalObject*, WTF::PassRefPtr<JSC::Microtask>)::$_0>, void (WebCore::ScriptExecutionContext&)>::operator()(WebCore::ScriptExecutionContext&) + 92 (functional:1370)
4   com.apple.WebCore                 0x0000000114570f8b std::__1::function<void (WebCore::ScriptExecutionContext&)>::operator()(WebCore::ScriptExecutionContext&) const + 59 (functional:1756)
5   com.apple.WebCore                 0x000000011453681d WebCore::ScriptExecutionContext::Task::performTask(WebCore::ScriptExecutionContext&) + 29 (ScriptExecutionContext.h:151)
6   com.apple.WebCore                 0x00000001163e8569 WebCore::WorkerRunLoop::Task::performTask(WebCore::WorkerRunLoop const&, WebCore::WorkerGlobalScope*) + 105 (WorkerRunLoop.cpp:224)
7   com.apple.WebCore                 0x00000001163e8015 WebCore::WorkerRunLoop::runInMode(WebCore::WorkerGlobalScope*, WebCore::ModePredicate const&, WebCore::WorkerRunLoop::WaitMode) + 1029 (WorkerRunLoop.cpp:171)
8   com.apple.WebCore                 0x00000001163e7bd6 WebCore::WorkerRunLoop::run(WebCore::WorkerGlobalScope*) + 86 (WorkerRunLoop.cpp:127)
9   com.apple.WebCore                 0x00000001163efec5 WebCore::WorkerThread::runEventLoop() + 53 (WorkerThread.cpp:176)
10  com.apple.WebCore                 0x00000001144c4259 WebCore::DedicatedWorkerThread::runEventLoop() + 89 (DedicatedWorkerThread.cpp:66)

This started on December 14th, but it's not frequent enough to pinpoint the exact culprit. It seems to happen a lot more on EWS, significantly affecting its performance.

Could you please take a look soon?

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