Bug 119222 - Frequent crashes when typing in chat in gmail
Summary: Frequent crashes when typing in chat in gmail
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: JavaScriptCore (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P1 Normal
Assignee: Nobody
URL:
Keywords: Regression
Depends on:
Blocks:
 
Reported: 2013-07-29 13:43 PDT by Elliott Sprehn
Modified: 2013-09-10 10:17 PDT (History)
3 users (show)

See Also:


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Description Elliott Sprehn 2013-07-29 13:43:45 PDT
Process:         WebProcess [67128]
Path:            /Applications/WebKit.app/Contents/Frameworks/10.8/WebKit2.framework/WebProcess.app/Contents/MacOS/WebProcess
Identifier:      com.apple.WebProcess
Version:         538+ (538.1+)
Code Type:       X86-64 (Native)
Parent Process:  ??? [1]
User ID:         118728

Date/Time:       2013-07-29 13:41:48.045 -0700
OS Version:      Mac OS X 10.8.4 (12E55)
Report Version:  10

Crashed Thread:  19  JSC Compilation Thread

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000000bbadbeef

VM Regions Near 0xbbadbeef:
--> 
    __TEXT                 000000010bdc5000-000000010bdc6000 [    4K] r-x/rwx SM=COW  /Applications/WebKit.app/Contents/Frameworks/10.8/WebKit2.framework/WebProcess.app/Contents/MacOS/WebProcess

Application Specific Information:
Bundle controller class:
BrowserBundleController
 

Thread 0:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff8e400686 mach_msg_trap + 10
1   libsystem_kernel.dylib        	0x00007fff8e3ffc42 mach_msg + 70
2   com.apple.CoreFoundation      	0x00007fff97f39233 __CFRunLoopServiceMachPort + 195
3   com.apple.CoreFoundation      	0x00007fff97f3e916 __CFRunLoopRun + 1078
4   com.apple.CoreFoundation      	0x00007fff97f3e0e2 CFRunLoopRunSpecific + 290
5   com.apple.HIToolbox           	0x00007fff94adceb4 RunCurrentEventLoopInMode + 209
6   com.apple.HIToolbox           	0x00007fff94adcc52 ReceiveNextEventCommon + 356
7   com.apple.HIToolbox           	0x00007fff94adcae3 BlockUntilNextEventMatchingListInMode + 62
8   com.apple.AppKit              	0x00007fff93dfa533 _DPSNextEvent + 685
9   com.apple.AppKit              	0x00007fff93df9df2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
10  com.apple.AppKit              	0x00007fff93df11a3 -[NSApplication run] + 517
11  com.apple.WebCore             	0x000000010d1afea2 WebCore::RunLoop::run() + 82
12  com.apple.WebKit2             	0x000000010beb6263 int WebKit::ChildProcessMain<WebKit::WebProcess, WebKit::WebContentProcessMainDelegate>(int, char**) + 579
13  com.apple.WebProcess          	0x000000010bdc5e23 main + 337
14  libdyld.dylib                 	0x00007fff907ca7e1 start + 1

Thread 1:: Dispatch queue: com.apple.libdispatch-manager
0   libsystem_kernel.dylib        	0x00007fff8e402d16 kevent + 10
1   libdispatch.dylib             	0x00007fff98280dea _dispatch_mgr_invoke + 883
2   libdispatch.dylib             	0x00007fff982809ee _dispatch_mgr_thread + 54

Thread 2:: JavaScriptCore::BlockFree
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c5735d6 WTF::ThreadCondition::timedWait(WTF::Mutex&, double) + 118
3   com.apple.JavaScriptCore      	0x000000010c27bb3b JSC::BlockAllocator::blockFreeingThreadMain() + 123
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 3:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 4:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 5:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 6:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 7:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 8:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 9:: WebCore: Scrolling
0   libsystem_kernel.dylib        	0x00007fff8e400686 mach_msg_trap + 10
1   libsystem_kernel.dylib        	0x00007fff8e3ffc42 mach_msg + 70
2   com.apple.CoreFoundation      	0x00007fff97f39233 __CFRunLoopServiceMachPort + 195
3   com.apple.CoreFoundation      	0x00007fff97f3e916 __CFRunLoopRun + 1078
4   com.apple.CoreFoundation      	0x00007fff97f3e0e2 CFRunLoopRunSpecific + 290
5   com.apple.CoreFoundation      	0x00007fff97f4cdd1 CFRunLoopRun + 97
6   com.apple.WebCore             	0x000000010d1db87e WebCore::ScrollingThread::initializeRunLoop() + 254
7   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
8   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
9   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 10:: com.apple.NSURLConnectionLoader
0   libsystem_kernel.dylib        	0x00007fff8e400686 mach_msg_trap + 10
1   libsystem_kernel.dylib        	0x00007fff8e3ffc42 mach_msg + 70
2   com.apple.CoreFoundation      	0x00007fff97f39233 __CFRunLoopServiceMachPort + 195
3   com.apple.CoreFoundation      	0x00007fff97f3e916 __CFRunLoopRun + 1078
4   com.apple.CoreFoundation      	0x00007fff97f3e0e2 CFRunLoopRunSpecific + 290
5   com.apple.Foundation          	0x00007fff8fbcd546 +[NSURLConnection(Loader) _resourceLoadLoop:] + 356
6   com.apple.Foundation          	0x00007fff8fc2b562 __NSThread__main__ + 1345
7   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
8   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 11:: com.apple.CFSocket.private
0   libsystem_kernel.dylib        	0x00007fff8e402322 __select + 10
1   com.apple.CoreFoundation      	0x00007fff97f7df46 __CFSocketManager + 1302
2   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
3   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 12:: JavaScriptCore::BlockFree
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c5735d6 WTF::ThreadCondition::timedWait(WTF::Mutex&, double) + 118
3   com.apple.JavaScriptCore      	0x000000010c27bb3b JSC::BlockAllocator::blockFreeingThreadMain() + 123
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 13:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 14:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 15:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 16:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 17:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 18:: JavaScriptCore::Marking
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.JavaScriptCore      	0x000000010c3a0fab JSC::GCThread::waitForNextPhase() + 123
3   com.apple.JavaScriptCore      	0x000000010c3a106f JSC::GCThread::gcThreadMain() + 143
4   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 19 Crashed:: JSC Compilation Thread
0   com.apple.JavaScriptCore      	0x000000010c5462fc WTFCrash + 76
1   com.apple.JavaScriptCore      	0x000000010c26b959 WTF::CrashOnOverflow::overflowed() + 9
2   com.apple.JavaScriptCore      	0x000000010c30a1ff JSC::DFG::JITCompiler::link(JSC::LinkBuffer&) + 4927
3   com.apple.JavaScriptCore      	0x000000010c30aec0 JSC::DFG::JITCompiler::linkFunction() + 240
4   com.apple.JavaScriptCore      	0x000000010c31c23a JSC::DFG::Plan::compileInThreadImpl(JSC::DFG::LongLivedState&) + 938
5   com.apple.JavaScriptCore      	0x000000010c31bd04 JSC::DFG::Plan::compileInThread(JSC::DFG::LongLivedState&) + 228
6   com.apple.JavaScriptCore      	0x000000010c39404b JSC::DFG::Worklist::runThread() + 251
7   com.apple.JavaScriptCore      	0x000000010c5728ef WTF::wtfThreadEntryPoint(void*) + 15
8   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
9   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 20:: com.apple.coremedia.networkbuffering
0   libsystem_kernel.dylib        	0x00007fff8e400686 mach_msg_trap + 10
1   libsystem_kernel.dylib        	0x00007fff8e3ffc42 mach_msg + 70
2   com.apple.CoreFoundation      	0x00007fff97f39233 __CFRunLoopServiceMachPort + 195
3   com.apple.CoreFoundation      	0x00007fff97f3e916 __CFRunLoopRun + 1078
4   com.apple.CoreFoundation      	0x00007fff97f3e0e2 CFRunLoopRunSpecific + 290
5   com.apple.CoreFoundation      	0x00007fff97f4cdd1 CFRunLoopRun + 97
6   com.apple.CoreMedia           	0x00007fff8fb67830 FigThreadGlobalNetworkBufferingRunloop + 21
7   com.apple.CoreMedia           	0x00007fff8fb69379 figThreadMain + 382
8   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
9   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 21:: com.apple.coremedia.asyncio
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.CoreMedia           	0x00007fff8fb68ea8 FigSemaphoreWaitRelative + 273
3   com.apple.MediaToolbox        	0x00007fff8ff0f6a1 0x7fff8fef5000 + 108193
4   com.apple.CoreMedia           	0x00007fff8fb69379 figThreadMain + 382
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 22:: com.apple.coremedia.player.async
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.CoreMedia           	0x00007fff8fb68ea8 FigSemaphoreWaitRelative + 273
3   com.apple.MediaToolbox        	0x00007fff8ff4ecaf 0x7fff8fef5000 + 367791
4   com.apple.CoreMedia           	0x00007fff8fb69379 figThreadMain + 382
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 23:: AQClient
0   libsystem_kernel.dylib        	0x00007fff8e400686 mach_msg_trap + 10
1   libsystem_kernel.dylib        	0x00007fff8e3ffc42 mach_msg + 70
2   com.apple.CoreFoundation      	0x00007fff97f39233 __CFRunLoopServiceMachPort + 195
3   com.apple.CoreFoundation      	0x00007fff97f3e916 __CFRunLoopRun + 1078
4   com.apple.CoreFoundation      	0x00007fff97f3e0e2 CFRunLoopRunSpecific + 290
5   com.apple.audio.toolbox.AudioToolbox	0x00007fff8ee7570e GenericRunLoopThread::Entry(void*) + 204
6   com.apple.audio.toolbox.AudioToolbox	0x00007fff8ee755c5 CAPThread::Entry(CAPThread*) + 175
7   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
8   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 24:: com.apple.coremedia.audioqueue.source
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.CoreMedia           	0x00007fff8fb68ea8 FigSemaphoreWaitRelative + 273
3   com.apple.MediaToolbox        	0x00007fff8ff26bda 0x7fff8fef5000 + 203738
4   com.apple.CoreMedia           	0x00007fff8fb69379 figThreadMain + 382
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 25:: com.apple.coremedia.audiomentor
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.CoreMedia           	0x00007fff8fb68ea8 FigSemaphoreWaitRelative + 273
3   com.apple.MediaToolbox        	0x00007fff8ff6ff97 0x7fff8fef5000 + 503703
4   com.apple.CoreMedia           	0x00007fff8fb69379 figThreadMain + 382
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 26:: com.apple.coremedia.player.async
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.CoreMedia           	0x00007fff8fb68ea8 FigSemaphoreWaitRelative + 273
3   com.apple.MediaToolbox        	0x00007fff8ff4ecaf 0x7fff8fef5000 + 367791
4   com.apple.CoreMedia           	0x00007fff8fb69379 figThreadMain + 382
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 27:: com.apple.coremedia.audioqueue.source
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.CoreMedia           	0x00007fff8fb68ea8 FigSemaphoreWaitRelative + 273
3   com.apple.MediaToolbox        	0x00007fff8ff26bda 0x7fff8fef5000 + 203738
4   com.apple.CoreMedia           	0x00007fff8fb69379 figThreadMain + 382
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 28:: com.apple.coremedia.audiomentor
0   libsystem_kernel.dylib        	0x00007fff8e4020fa __psynch_cvwait + 10
1   libsystem_c.dylib             	0x00007fff98164fe9 _pthread_cond_wait + 869
2   com.apple.CoreMedia           	0x00007fff8fb68ea8 FigSemaphoreWaitRelative + 273
3   com.apple.MediaToolbox        	0x00007fff8ff6ff97 0x7fff8fef5000 + 503703
4   com.apple.CoreMedia           	0x00007fff8fb69379 figThreadMain + 382
5   libsystem_c.dylib             	0x00007fff981607a2 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff9814d1e1 thread_start + 13

Thread 29:
0   libsystem_kernel.dylib        	0x00007fff8e4026d6 __workq_kernreturn + 10
1   libsystem_c.dylib             	0x00007fff98162f4c _pthread_workq_return + 25
2   libsystem_c.dylib             	0x00007fff98162d13 _pthread_wqthread + 412
3   libsystem_c.dylib             	0x00007fff9814d1d1 start_wqthread + 13

Thread 30:
0   libsystem_kernel.dylib        	0x00007fff8e4026d6 __workq_kernreturn + 10
1   libsystem_c.dylib             	0x00007fff98162f4c _pthread_workq_return + 25
2   libsystem_c.dylib             	0x00007fff98162d13 _pthread_wqthread + 412
3   libsystem_c.dylib             	0x00007fff9814d1d1 start_wqthread + 13

Thread 19 crashed with X86 Thread State (64-bit):
  rax: 0x00000000bbadbeef  rbx: 0x0000000000000004  rcx: 0x000000011536fbf0  rdx: 0x00007fff7f25e9d0
  rdi: 0x0000000000000000  rsi: 0x0000080000000800  rbp: 0x0000000115370480  rsp: 0x0000000115370370
   r8: 0x0000000000002060   r9: 0x000000011536fbf0  r10: 0x0000000000000008  r11: 0x0000000000000246
  r12: 0x0000000000000001  r13: 0x000000011dbb12e8  r14: 0x000000011cda2c80  r15: 0x0000000000000005
  rip: 0x000000010c5462fc  rfl: 0x0000000000010202  cr2: 0x00000000bbadbeef
Logical CPU: 0
Comment 1 Elliott Sprehn 2013-07-29 13:44:16 PDT
This is with Webkit nightly r153413
Comment 2 Alexey Proskuryakov 2013-09-10 09:51:00 PDT
What is the next step for this bug? Does it still occur?
Comment 3 Filip Pizlo 2013-09-10 10:17:55 PDT
(In reply to comment #2)
> What is the next step for this bug? Does it still occur?

I will check but I recall fixing something with that crash signature.