Do not be fooled by the URL. NRWT does not do a good job of associating crashes with the tests that crashed. I can reproduce this locally via: run-webkit-tests -2 LayoutTests/fast/loader/reload-zero-byte-plugin.html Unfortunately, due to the number of crashers we have in the tests right now, it is not easy to figure out when this regressed. void WebFrameProxy::didFinishLoad() { ASSERT(m_loadState == LoadStateCommitted); ASSERT(m_provisionalURL.isEmpty()); m_loadState = LoadStateFinished; } http://build.webkit.org/results/Lion%20Intel%20Debug%20(WebKit2%20Tests)/r110783%20(4924)/fast/frames/iframe-reparenting-crash-log.txt Process: WebKitTestRunner [80501] Path: /Volumes/VOLUME/*/WebKitTestRunner Identifier: WebKitTestRunner Version: ??? (???) Code Type: X86-64 (Native) Parent Process: Python [80081] Date/Time: 2012-03-14 17:17:10.996 -0700 OS Version: Mac OS X 10.7.2 (11C74) Report Version: 9 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x00000000bbadbeef VM Regions Near 0xbbadbeef: --> __TEXT 0000000108d56000-0000000108d6c000 [ 88K] r-x/rwx SM=COW /Volumes/VOLUME/* Application Specific Information: objc[80501]: garbage collection is OFF Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.WebKit2 0x0000000108f7eaa0 WebKit::WebFrameProxy::didFinishLoad() + 96 (WebFrameProxy.cpp:176) 1 com.apple.WebKit2 0x00000001090067ac WebKit::WebPageProxy::didFinishLoadForFrame(unsigned long long, CoreIPC::ArgumentDecoder*) + 316 (WebPageProxy.cpp:1859) 2 com.apple.WebKit2 0x000000010905e272 void CoreIPC::callMemberFunction<WebKit::WebPageProxy, void (WebKit::WebPageProxy::*)(unsigned long long, CoreIPC::ArgumentDecoder*), unsigned long long>(CoreIPC::Arguments1<unsigned long long> const&, CoreIPC::ArgumentDecoder*, WebKit::WebPageProxy*, void (WebKit::WebPageProxy::*)(unsigned long long, CoreIPC::ArgumentDecoder*)) + 146 (HandleMessage.h:230) 3 com.apple.WebKit2 0x000000010904fca7 void CoreIPC::handleMessageVariadic<Messages::WebPageProxy::DidFinishLoadForFrame, WebKit::WebPageProxy, void (WebKit::WebPageProxy::*)(unsigned long long, CoreIPC::ArgumentDecoder*)>(CoreIPC::ArgumentDecoder*, WebKit::WebPageProxy*, void (WebKit::WebPageProxy::*)(unsigned long long, CoreIPC::ArgumentDecoder*)) + 119 (HandleMessage.h:327) 4 com.apple.WebKit2 0x000000010904c22c WebKit::WebPageProxy::didReceiveWebPageProxyMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*) + 2716 (WebPageProxyMessageReceiver.cpp:243) 5 com.apple.WebKit2 0x0000000109004abf WebKit::WebPageProxy::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*) + 271 (WebPageProxy.cpp:1614) 6 com.apple.WebKit2 0x000000010909fbd6 WebKit::WebProcessProxy::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*) + 438 (WebProcessProxy.cpp:332) 7 com.apple.WebKit2 0x0000000108f1a485 WebKit::WebConnectionToWebProcess::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*) + 405 (WebConnectionToWebProcess.cpp:93) 8 com.apple.WebKit2 0x0000000108f1a4cd non-virtual thunk to WebKit::WebConnectionToWebProcess::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*) + 61 9 com.apple.WebKit2 0x0000000108db5fec CoreIPC::Connection::dispatchMessage(CoreIPC::Connection::Message<CoreIPC::ArgumentDecoder>&) + 428 (Connection.cpp:692) 10 com.apple.WebKit2 0x0000000108db8b43 CoreIPC::Connection::dispatchMessages() + 211 (Connection.cpp:720) 11 com.apple.WebKit2 0x0000000108dbfc50 WTF::FunctionWrapper<void (CoreIPC::Connection::*)()>::operator()(CoreIPC::Connection*) + 112 (Functional.h:173) 12 com.apple.WebKit2 0x0000000108dbfbd5 WTF::BoundFunctionImpl<WTF::FunctionWrapper<void (CoreIPC::Connection::*)()>, void ()(CoreIPC::Connection*)>::operator()() + 53 (Functional.h:373) 13 com.apple.WebCore 0x000000010c40d60d WTF::Function<void ()()>::operator()() const + 141 (Functional.h:581) 14 com.apple.WebCore 0x000000010c40d393 WebCore::RunLoop::performWork() + 147 (RunLoop.cpp:66) 15 com.apple.WebCore 0x000000010c40e7b0 WebCore::RunLoop::performWork(void*) + 96 (RunLoopMac.mm:65) 16 com.apple.CoreFoundation 0x00007fff875e2b51 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 17 com.apple.CoreFoundation 0x00007fff875e23bd __CFRunLoopDoSources0 + 253 18 com.apple.CoreFoundation 0x00007fff876091a9 __CFRunLoopRun + 905 19 com.apple.CoreFoundation 0x00007fff87608ae6 CFRunLoopRunSpecific + 230 20 com.apple.Foundation 0x00007fff80f4e04f -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 267 21 WebKitTestRunner 0x0000000108d60ddc WTR::TestController::platformRunUntil(bool&, double) + 204 (TestControllerMac.mm:60) 22 WebKitTestRunner 0x0000000108d5c6f5 WTR::TestController::runUntil(bool&, WTR::TestController::TimeoutDuration) + 149 (TestController.cpp:563) 23 WebKitTestRunner 0x0000000108d61b64 WTR::TestInvocation::invoke() + 1396 (TestInvocation.cpp:171) 24 WebKitTestRunner 0x0000000108d5cd78 WTR::TestController::runTest(char const*) + 1656 (TestController.cpp:513) 25 WebKitTestRunner 0x0000000108d5ce82 WTR::TestController::runTestingServerLoop() + 178 (TestController.cpp:529) 26 WebKitTestRunner 0x0000000108d5b500 WTR::TestController::run() + 48 (TestController.cpp:537) 27 WebKitTestRunner 0x0000000108d5a1c6 WTR::TestController::TestController(int, char const**) + 614 (TestController.cpp:88) 28 WebKitTestRunner 0x0000000108d59f53 WTR::TestController::TestController(int, char const**) + 35 (TestController.cpp:89) 29 WebKitTestRunner 0x0000000108d57eaf main + 143 (main.mm:36) 30 WebKitTestRunner 0x0000000108d57e14 start + 52
<rdar://problem/11052462>
Fixed in <http://trac.webkit.org/changeset/111059>. This certainly had release mode consequences, although I didn't take the time to investigate how symptoms would look like.