This test sometimes asserts: Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.JavaScriptCore 0x000000010fc070aa WTFCrash + 42 (Assertions.cpp:339) 1 com.apple.WebCore 0x0000000111481b56 WebCore::JSEventListener::jsFunction(WebCore::ScriptExecutionContext*) const + 390 (JSEventListener.h:94) 2 com.apple.WebCore 0x00000001115ef33b WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext*, WebCore::Event*) + 171 (JSEventListener.cpp:84) 3 com.apple.WebCore 0x0000000110f819e2 WebCore::EventTarget::fireEventListeners(WebCore::Event*, WebCore::EventTargetData*, WTF::Vector<WebCore::RegisteredEventListener, 1ul, WTF::CrashOnOverflow>&) + 498 (EventTarget.cpp:249) 4 com.apple.WebCore 0x0000000110f815be WebCore::EventTarget::fireEventListeners(WebCore::Event*) + 334 (EventTarget.cpp:190) 5 com.apple.WebCore 0x0000000110f81437 WebCore::EventTarget::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) + 135 (EventTarget.cpp:156) 6 com.apple.WebCore 0x0000000111f74cf9 WebCore::ScriptProcessorNode::fireProcessEvent() + 489 (ScriptProcessorNode.cpp:262) 7 com.apple.WebCore 0x0000000111f74a77 WebCore::ScriptProcessorNode::fireProcessEventDispatch(void*) + 103 (ScriptProcessorNode.cpp:235) 8 com.apple.JavaScriptCore 0x000000010fc27968 WTF::dispatchFunctionsFromMainThread() + 280 (MainThread.cpp:156) 9 com.apple.JavaScriptCore 0x000000010fc29f55 -[JSWTFMainThreadCaller call] + 21 (MainThreadMac.mm:49) 10 com.apple.Foundation 0x00007fff9418e5ca __NSThreadPerformPerform + 225 11 com.apple.CoreFoundation 0x00007fff90c2fb31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 12 com.apple.CoreFoundation 0x00007fff90c2f455 __CFRunLoopDoSources0 + 245 13 com.apple.CoreFoundation 0x00007fff90c527f5 __CFRunLoopRun + 789 14 com.apple.CoreFoundation 0x00007fff90c520e2 CFRunLoopRunSpecific + 290 15 com.apple.HIToolbox 0x00007fff8f905eb4 RunCurrentEventLoopInMode + 209 16 com.apple.HIToolbox 0x00007fff8f905c52 ReceiveNextEventCommon + 356 17 com.apple.HIToolbox 0x00007fff8f905ae3 BlockUntilNextEventMatchingListInMode + 62
*** This bug has been marked as a duplicate of bug 120148 ***