https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20JSC%20%28Tests%29/builds/4461/steps/jscore-test/logs/stdio wasm.yaml/wasm/js-api/test_Module.js.default-wasm: ASSERTION FAILED: length > offset wasm.yaml/wasm/js-api/test_Module.js.default-wasm: /Volumes/Data/slave/elcapitan-debug/build/WebKitBuild/Debug/usr/local/include/wtf/LEBDecoder.h(40) : bool WTF::LEBDecoder::decodeUInt(const uint8_t *, size_t, size_t &, T &) [maxByteLength = 5, T = unsigned int] wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 1 0x10380d060 WTFCrash wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 2 0x103604230 bool WTF::LEBDecoder::decodeUInt<5ul, unsigned int>(unsigned char const*, unsigned long, unsigned long&, unsigned int&) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 3 0x1036041cd WTF::LEBDecoder::decodeUInt32(unsigned char const*, unsigned long, unsigned long&, unsigned int&) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 4 0x103604000 JSC::Wasm::Parser::parseVarUInt32(unsigned int&) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 5 0x1037b9142 JSC::Wasm::ModuleParser::parse() wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 6 0x10303a07f JSC::Wasm::Plan::Plan(JSC::VM&, unsigned char const*, unsigned long) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 7 0x10303aa7d JSC::Wasm::Plan::Plan(JSC::VM&, unsigned char const*, unsigned long) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 8 0x1031e9628 JSC::constructJSWebAssemblyModule(JSC::ExecState*) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 9 0x1033a293a JSC::LLInt::handleHostCall(JSC::ExecState*, JSC::Instruction*, JSC::JSValue, JSC::CodeSpecializationKind) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 10 0x1033a37fc JSC::LLInt::setUpCall(JSC::ExecState*, JSC::Instruction*, JSC::CodeSpecializationKind, JSC::JSValue, JSC::LLIntCallLinkInfo*) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 11 0x1033a33f6 JSC::LLInt::genericCall(JSC::ExecState*, JSC::Instruction*, JSC::CodeSpecializationKind) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 12 0x10339fcdc llint_slow_path_construct wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 13 0x1033adfff llint_entry wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 14 0x1033adca0 llint_entry wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 15 0x1033a660e vmEntryToJavaScript wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 16 0x10317644c JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 17 0x1030f2e52 JSC::Interpreter::execute(JSC::ModuleProgramExecutable*, JSC::ExecState*, JSC::JSModuleEnvironment*) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 18 0x103295d2f JSC::JSModuleRecord::evaluate(JSC::ExecState*) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 19 0x10380c2f8 JSC::JSModuleLoader::evaluate(JSC::ExecState*, JSC::JSValue, JSC::JSValue, JSC::JSValue) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 20 0x1033e1058 JSC::moduleLoaderPrototypeEvaluate(JSC::ExecState*) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 21 0x4674dae01028 wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 22 0x1033adc26 llint_entry wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 23 0x1033adca0 llint_entry wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 24 0x4674dae099b9 wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 25 0x1033a660e vmEntryToJavaScript wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 26 0x10317644c JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 27 0x1030f1daf JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 28 0x1028fa75e JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 29 0x1028fa9ab JSC::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 30 0x10327c056 JSC::JSJobMicrotask::run(JSC::ExecState*) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: 31 0x1036abc55 JSC::QueuedTask::run() wasm.yaml/wasm/js-api/test_Module.js.default-wasm: test_script_31118: line 2: 51572 Segmentation fault: 11 ( "$@" ../../../../.vm/JavaScriptCore.framework/Resources/jsc --useFTLJIT\=false --useFunctionDotArguments\=true --maxPerThreadStackUsage\=1572864 -m --useWebAssembly\=1 test_Module.js ) wasm.yaml/wasm/js-api/test_Module.js.default-wasm: ERROR: Unexpected exit code: 139 FAIL: wasm.yaml/wasm/js-api/test_Module.js.default-wasm
My guess is that https://trac.webkit.org/changeset/208401 is the source.
Created attachment 294415 [details] patch I have no idea how anything ever worked before!
Comment on attachment 294415 [details] patch r=me.
Comment on attachment 294415 [details] patch View in context: https://bugs.webkit.org/attachment.cgi?id=294415&action=review Actually, one comment. > JSTests/wasm/LowLevelBinary.js:79 > + trim() { this._buf = this._buf.slice(0, this._used); } You don't use this.
Comment on attachment 294415 [details] patch View in context: https://bugs.webkit.org/attachment.cgi?id=294415&action=review >> JSTests/wasm/LowLevelBinary.js:79 >> + trim() { this._buf = this._buf.slice(0, this._used); } > > You don't use this. I'm an idiot. Ignore this comment.
Comment on attachment 294415 [details] patch Clearing flags on attachment: 294415 Committed r208567: <http://trac.webkit.org/changeset/208567>
All reviewed patches have been landed. Closing bug.