Created attachment 340189 [details] Full crash log. Unfortunately I don't have an URL to share, as this is an internal unreleased project but... We have a simple WebGL application that leverages native C++ ported to web with WASM. Works fine in every WASM capable browser with the exception of Safari 11.1 (12605.1.33.1.4) on 10.12.6. After a couple minutes of the application sitting idle, Safari will crash with the following call stack. I am not sure if this is a clue but we can't seem to get Safari 11.1(13605.1.33.1.2) to crash on 10.13.4. As this is a crash in the production shipping Safari I wanted to make sure to file. Please let us know if this is confirmed fixed already (if feasible). Full callstack is attached. ----<snip>----- Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: EXC_I386_GPFLT Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [0] Application Specific Information: Bundle controller class: BrowserBundleController Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.JavaScriptCore 0x000000010baa734a WTF::WordLock::lockSlow() + 42 1 com.apple.JavaScriptCore 0x000000010ba9194a WTF::ParkingLot::unparkOneImpl(void const*, WTF::ScopedLambda<long (WTF::ParkingLot::UnparkResult)> const&) + 362 2 com.apple.JavaScriptCore 0x000000010ba896d0 WTF::LockAlgorithm<unsigned char, (unsigned char)1, (unsigned char)2, WTF::EmptyLockHooks<unsigned char> >::unlockSlow(WTF::Atomic<unsigned char>&, WTF::LockAlgorithm<unsigned char, (unsigned char)1, (unsigned char)2, WTF::EmptyLockHooks<unsigned char> >::Fairness) + 96 3 com.apple.JavaScriptCore 0x000000010ba1316b JSC::Wasm::Worklist::enqueue(WTF::Ref<JSC::Wasm::Plan, WTF::DumbPtrTraits<JSC::Wasm::Plan> >) + 219 4 com.apple.JavaScriptCore 0x000000010ba011c6 JSC::Wasm::OMGPlan::runForIndex(JSC::Wasm::Instance*, unsigned int) + 390 5 ??? 0x00004e8f77a6d58b 0 + 86378094712203 6 ??? 0x00004e8f77f6c335 0 + 86378099950389 7 ??? 0x00004e8f77dd945b 0 + 86378098299995 8 ??? 0x00004e8f77bb8acc 0 + 86378096069324 9 ??? 0x00004e8f77ddf894 0 + 86378098325652 10 ??? 0x00004e8f77ba2504 0 + 86378095977732 11 ??? 0x00004e8f77d0f05c 0 + 86378097471580 12 com.apple.JavaScriptCore 0x000000010b066b2a vmEntryToJavaScript + 304 13 com.apple.JavaScriptCore 0x000000010ba35e71 JSC::callWebAssemblyFunction(JSC::ExecState*) + 2689 14 com.apple.JavaScriptCore 0x000000010b6bcea7 JSC::handleHostCall(JSC::ExecState*, JSC::JSValue, JSC::CallLinkInfo*) + 519 15 com.apple.JavaScriptCore 0x000000010afb2f2f operationLinkCall + 351 16 ??? 0x00004e8f77a02207 0 + 86378094273031 17 ??? 0x00004e8f77f60b52 0 + 86378099903314 18 ??? 0x00004e8f77dbc848 0 + 86378098182216 19 ??? 0x00004e8f77ad512a 0 + 86378095137066 20 ??? 0x00004e8f77da38fc 0 + 86378098079996 21 com.apple.JavaScriptCore 0x000000010b066b2a vmEntryToJavaScript + 304 22 com.apple.JavaScriptCore 0x000000010b6a1ff3 JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) + 163 23 com.apple.JavaScriptCore 0x000000010aee872e JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 542 24 com.apple.JavaScriptCore 0x000000010b7f9095 JSC::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) + 197 25 com.apple.WebCore 0x0000000108cf2961 WebCore::JSCallbackData::invokeCallback(WebCore::JSDOMGlobalObject&, JSC::JSObject*, JSC::JSValue, JSC::MarkedArgumentBuffer&, WebCore::JSCallbackData::CallbackType, JSC::PropertyName, WTF::NakedPtr<JSC::Exception>&) + 481 26 com.apple.WebCore 0x00000001084151ee WebCore::JSRequestAnimationFrameCallback::handleEvent(double) + 366 27 com.apple.WebCore 0x0000000108414eb4 WebCore::ScriptedAnimationController::serviceScriptedAnimations(double) + 564 28 com.apple.WebCore 0x0000000108409eaa WebCore::DisplayRefreshMonitor::displayDidRefresh() + 282 29 com.apple.JavaScriptCore 0x000000010ba94794 WTF::RunLoop::performWork() + 212 30 com.apple.JavaScriptCore 0x000000010ba94a12 WTF::RunLoop::performWork(void*) + 34 31 com.apple.CoreFoundation 0x00007fffc0e61321 _CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION_ + 17 32 com.apple.CoreFoundation 0x00007fffc0e4221d __CFRunLoopDoSources0 + 557 33 com.apple.CoreFoundation 0x00007fffc0e41716 __CFRunLoopRun + 934 34 com.apple.CoreFoundation 0x00007fffc0e41114 CFRunLoopRunSpecific + 420 35 com.apple.HIToolbox 0x00007fffc03a1ebc RunCurrentEventLoopInMode + 240 36 com.apple.HIToolbox 0x00007fffc03a1cf1 ReceiveNextEventCommon + 432 37 com.apple.HIToolbox 0x00007fffc03a1b26 _BlockUntilNextEventMatchingListInModeWithFilter + 71 38 com.apple.AppKit 0x00007fffbe93aa54 _DPSNextEvent + 1120 39 com.apple.AppKit 0x00007fffbf0b67ee -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 2796 40 com.apple.AppKit 0x00007fffbe92f3db -[NSApplication run] + 926 41 com.apple.AppKit 0x00007fffbe8f9e0e NSApplicationMain + 1237 42 libxpc.dylib 0x00007fffd68288c7 _xpc_objc_main + 775 43 libxpc.dylib 0x00007fffd68272e4 xpc_main + 494 44 com.apple.WebKit.WebContent 0x0000000107573695 0x107572000 + 5781 45 libdyld.dylib 0x00007fffd65cf235 start + 1
Thank you for the report! Could you please attach a complete crash log the way it's saved to ~/Library/Logs/DiagnosticReports? Also, is this still happening with a WebKit nightly and/or Safari Tech Preview?
I guess this is related to bug 185117. If so, this is fixed in the latest STP. Could you try it in the latest STP?
Created attachment 340648 [details] Crashlog
Thank you! rdar://problem/37019648
*** This bug has been marked as a duplicate of bug 185117 ***