Seems similar to Bug 119155 Process: WebProcess [33495] Path: /Volumes/VOLUME/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: ??? [33491] User ID: 501 Date/Time: 2013-07-29 18:27:00.169 -0400 OS Version: Mac OS X 10.8.4 (12E55) Report Version: 10 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000006 VM Regions Near 0x6: --> __TEXT 0000000107006000-0000000107007000 [ 4K] r-x/rwx SM=COW /Volumes/VOLUME/WebKit.app/Contents/Frameworks/10.8/WebKit2.framework/WebProcess.app/Contents/MacOS/WebProcess Application Specific Information: Bundle controller class: BrowserBundleController Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 ??? 0x00003f676fc8aeb3 0 + 69713489604275 1 com.apple.JavaScriptCore 0x0000000107606fe1 JSC::JITCode::execute(JSC::JSStack*, JSC::ExecState*, JSC::VM*) + 49 2 com.apple.JavaScriptCore 0x00000001075ec40a JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 650 3 com.apple.JavaScriptCore 0x00000001074d2d45 JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 69 4 com.apple.WebCore 0x0000000107f4c6ac WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext*, WebCore::Event*) + 908 5 com.apple.WebCore 0x0000000107c17bbc WebCore::EventTarget::fireEventListeners(WebCore::Event*, WebCore::EventTargetData*, WTF::Vector<WebCore::RegisteredEventListener, 1ul, WTF::CrashOnOverflow>&) + 364 6 com.apple.WebCore 0x0000000107c178d6 WebCore::EventTarget::fireEventListeners(WebCore::Event*) + 390 7 com.apple.WebCore 0x0000000108211f53 WebCore::Node::handleLocalEvents(WebCore::Event*) + 67 8 com.apple.WebCore 0x0000000107bfffb7 WebCore::EventContext::handleLocalEvents(WebCore::Event*) const + 87 9 com.apple.WebCore 0x0000000107c00da7 WebCore::EventDispatcher::dispatch() + 727 10 com.apple.WebCore 0x0000000107c014bc WebCore::EventDispatchMediator::dispatchEvent(WebCore::EventDispatcher*) const + 12 11 com.apple.WebCore 0x0000000107c001cc WebCore::EventDispatcher::dispatchEvent(WebCore::Node*, WTF::PassRefPtr<WebCore::EventDispatchMediator>) + 124 12 com.apple.WebCore 0x000000010821215a WebCore::Node::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) + 234 13 com.apple.WebCore 0x0000000107b299dd WebCore::Document::finishedParsing() + 189 14 com.apple.WebCore 0x0000000107cf0574 WebCore::HTMLDocumentParser::prepareToStopParsing() + 164 15 com.apple.WebCore 0x0000000107cf1396 WebCore::HTMLDocumentParser::executeScriptsWaitingForStylesheets() + 54 16 com.apple.WebCore 0x0000000107b240a0 WebCore::Document::didRemoveAllPendingStylesheet() + 64 17 com.apple.WebCore 0x0000000107d1a94b WebCore::HTMLLinkElement::sheetLoaded() + 107 18 com.apple.WebCore 0x00000001084938de WebCore::StyleSheetContents::checkLoaded() + 206 19 com.apple.WebCore 0x0000000107d1a806 WebCore::HTMLLinkElement::setCSSStyleSheet(WTF::String const&, WebCore::KURL const&, WTF::String const&, WebCore::CachedCSSStyleSheet const*) + 1046 20 com.apple.WebCore 0x00000001079ba090 WebCore::CachedCSSStyleSheet::checkNotify() + 256 21 com.apple.WebCore 0x00000001079b9f59 WebCore::CachedCSSStyleSheet::finishLoading(WebCore::ResourceBuffer*) + 313 22 com.apple.WebCore 0x00000001084995b5 WebCore::SubresourceLoader::didFinishLoading(double) + 133 23 com.apple.Foundation 0x00007fff99e10d88 __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke_0 + 28 24 com.apple.Foundation 0x00007fff99e10ccc -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 227 25 com.apple.Foundation 0x00007fff99e10bc8 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 63 26 com.apple.CFNetwork 0x00007fff90117091 ___delegate_didFinishLoading_block_invoke_0 + 40 27 com.apple.CFNetwork 0x00007fff9010954a ___withDelegateAsync_block_invoke_0 + 90 28 com.apple.CFNetwork 0x00007fff90199f3a __block_global_1 + 28 29 com.apple.CoreFoundation 0x00007fff97b90154 CFArrayApplyFunction + 68 30 com.apple.CFNetwork 0x00007fff900fa2b4 RunloopBlockContext::perform() + 124 31 com.apple.CFNetwork 0x00007fff900fa18b MultiplexerSource::perform() + 221 32 com.apple.CoreFoundation 0x00007fff97b71b31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 33 com.apple.CoreFoundation 0x00007fff97b71455 __CFRunLoopDoSources0 + 245 34 com.apple.CoreFoundation 0x00007fff97b947f5 __CFRunLoopRun + 789 35 com.apple.CoreFoundation 0x00007fff97b940e2 CFRunLoopRunSpecific + 290 36 com.apple.HIToolbox 0x00007fff9667ceb4 RunCurrentEventLoopInMode + 209 37 com.apple.HIToolbox 0x00007fff9667cc52 ReceiveNextEventCommon + 356 38 com.apple.HIToolbox 0x00007fff9667cae3 BlockUntilNextEventMatchingListInMode + 62 39 com.apple.AppKit 0x00007fff96adc533 _DPSNextEvent + 685 40 com.apple.AppKit 0x00007fff96adbdf2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128 41 com.apple.AppKit 0x00007fff96ad31a3 -[NSApplication run] + 517 42 com.apple.WebCore 0x00000001083ec712 WebCore::RunLoop::run() + 82 43 com.apple.WebKit2 0x00000001070f5173 int WebKit::ChildProcessMain<WebKit::WebProcess, WebKit::WebContentProcessMainDelegate>(int, char**) + 579 44 com.apple.WebProcess 0x0000000107006e23 main + 337 45 libdyld.dylib 0x00007fff956247e1 start + 1
Still crashes in latest nightly.
Stopped crashing between r154216-r154220