132119 2014-04-24 02:20:58 -0700 [GTK] Running MiniBrowser under valgrind crashes almost 100% of the times 2017-03-11 10:55:46 -0800 1 1 1 Unclassified WebKit WebKit2 528+ (Nightly build) Unspecified Unspecified NEW P2 Normal --- 1 elima webkit-unassigned bugs-noreply oldest_to_newest 1003592 0 elima 2014-04-24 02:20:58 -0700 Everytime I run: G_DEBUG=resident-modules valgrind --tool=memcheck --leak-check=full --leak-resolution=high --num-callers=20 --log-file=vgdump --trace-children=yes WebKitBuild/Release/bin/MiniBrowser http://igalia.com the WebProcess crashes with SIGSEGV: ==5527== Invalid write of size 4 ==5527== at 0x5CD2594: WTFCrash (Assertions.cpp:333) ==5527== by 0x5A96C8F: JSC::linkFor(JSC::ExecState*, JSC::CallLinkInfo&, JSC::CodeBlock*, JSC::JSFunction*, JSC::MacroAssemblerCodePtr, JSC::CodeSpecializationKind, JSC::RegisterPreservat$ ==5527== by 0x5A7F55F: linkFor (JITOperations.cpp:717) ==5527== by 0x5A78F25: operationLinkCall (JITOperations.cpp:723) ==5527== by 0x39FE1A55: ??? ==5527== by 0x79FDD8FD: ??? ==5527== by 0x5CBAAE8: ??? (in /home/elima/gnome3/checkout/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-3.0.so.0.16.2) ==5527== by 0x39FE19F9: ??? ==5527== by 0x39FE19F9: ??? ==5527== by 0x5CB4F20: ??? (in /home/elima/gnome3/checkout/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-3.0.so.0.16.2) ==5527== by 0x5A6B2A4: JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) (JITCode.cpp:47) ==5527== by 0x5A4C605: JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::JSObject*) (Interpreter.cpp:933) ==5527== by 0x5B6AD2A: JSC::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, JSC::JSValue*) (Completion.cpp:82) ==5527== by 0xA9277E4: WebCore::JSMainThreadExecState::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, JSC::JSValue*) (JSMainThreadExecState.h:62) ==5527== by 0xA964FF4: WebCore::ScriptController::evaluateInWorld(WebCore::ScriptSourceCode const&, WebCore::DOMWrapperWorld&) (ScriptController.cpp:149) ==5527== by 0xA965111: WebCore::ScriptController::evaluate(WebCore::ScriptSourceCode const&) (ScriptController.cpp:165) ==5527== by 0xAC677DC: WebCore::ScriptElement::executeScript(WebCore::ScriptSourceCode const&) (ScriptElement.cpp:307) ==5527== by 0xAEBD29B: WebCore::HTMLScriptRunner::executePendingScriptAndDispatchEvent(WebCore::PendingScript&) (HTMLScriptRunner.cpp:144) ==5527== by 0xAEBD0E9: WebCore::HTMLScriptRunner::executeParsingBlockingScript() (HTMLScriptRunner.cpp:120) ==5527== by 0xAEBD5C7: WebCore::HTMLScriptRunner::executeParsingBlockingScripts() (HTMLScriptRunner.cpp:195) ==5527== Address 0xbbadbeef is not stack'd, malloc'd or (recently) free'd It happens in both release and debug builds, for trunk as of revision 167712. These crashes make it almost impossible to debug any other issue in WKGtk.