[Webkit-unassigned] [Bug 128656] New: REGRESSION: fast/workers/stress-js-execution.html crashes sometimes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=128656

           Summary: REGRESSION: fast/workers/stress-js-execution.html
                    crashes sometimes
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: Regression
          Severity: Normal
          Priority: P1
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ap at webkit.org
                CC: ggaren at apple.com, fpizlo at apple.com,
                    mhahnenberg at apple.com


fast/workers/stress-js-execution.html started to flakily crash yesterday. Not frequently enough for me to pinpoint the revision.

http://webkit-test-results.appspot.com/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Fworkers%2Fstress-js-execution.html

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore          0x000000010831bd4a WTFCrash + 42 (Assertions.cpp:333)
1   com.apple.JavaScriptCore          0x0000000107c2126d JSC::SlotVisitor::unconditionallyAppend(JSC::JSCell*) + 77 (SlotVisitorInlines.h:123)
2   com.apple.JavaScriptCore          0x0000000107f7b2ad JSC::Heap::addToRememberedSet(JSC::JSCell const*) + 237 (Heap.cpp:788)
3   com.apple.JavaScriptCore          0x0000000107cdd638 JSC::CodeBlockSet::rememberCurrentlyExecutingCodeBlocks(JSC::Heap*) + 152 (CodeBlockSet.cpp:117)
4   com.apple.JavaScriptCore          0x0000000107f7b90e JSC::Heap::collect() + 1470 (Heap.cpp:929)
5   com.apple.JavaScriptCore          0x0000000107f6b294 JSC::DefaultGCActivityCallback::doWork() + 212 (GCActivityCallback.cpp:100)
6   com.apple.JavaScriptCore          0x0000000107f8c242 JSC::HeapTimer::timerDidFire(__CFRunLoopTimer*, void*) + 338 (HeapTimer.cpp:98)
7   com.apple.CoreFoundation          0x00007fff8e826724 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20

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