Bug 284488 – REGRESSION(287653@main): [macOS Debug wk2] 2 tests in jquery are constantly crashing

• Component: New Bugs
• Status: RESOLVED FIXED

[Marta Darbinyan]

The following tests are constant crash in macOS and appear in EWS Sequoia queue as flaky on different PRs. 
jquery/attributes.html
jquery/event.html

The regression points to 287653@main change.

Error output:
 Thread 7 Crashed:: Dispatch queue: 
0  com.apple.JavaScriptCore	       0x12daf75c4 WTFCrashWithInfo(int, char const*, char const*, int)
1  com.apple.JavaScriptCore	       0x12c8a5860 JSC::DFG::SpeculativeJIT::compileGetByValOnString(JSC::DFG::Node*, WTF::ScopedLambda<std::__1::tuple<JSC::JSValueRegs, JSC::DataFormat> (JSC::DataFormat, bool)> const&)
2  com.apple.JavaScriptCore	       0x12cabbfcc JSC::DFG::SpeculativeJIT::compileGetByVal(JSC::DFG::Node*, WTF::ScopedLambda<std::__1::tuple<JSC::JSValueRegs, JSC::DataFormat> (JSC::DataFormat, bool)> const&)
3  com.apple.JavaScriptCore	       0x12c905428 JSC::DFG::SpeculativeJIT::compileEnumeratorGetByVal(JSC::DFG::Node*)::$_0::operator()(JSC::JSValueRegs) const
4  com.apple.JavaScriptCore	       0x12c9052c4 JSC::DFG::SpeculativeJIT::compileEnumeratorGetByVal(JSC::DFG::Node*)
5  com.apple.JavaScriptCore	       0x12cac5964 JSC::DFG::SpeculativeJIT::compile(JSC::DFG::Node*)
6  com.apple.JavaScriptCore	       0x12c88db34 JSC::DFG::SpeculativeJIT::compileCurrentBlock()
7  com.apple.JavaScriptCore	       0x12c879608 JSC::DFG::SpeculativeJIT::compileBody()
8  com.apple.JavaScriptCore	       0x12c87ac78 JSC::DFG::SpeculativeJIT::compileFunction()
9  com.apple.JavaScriptCore	       0x12dc71bf8 JSC::DFG::Plan::compileInThreadImpl()
10  com.apple.JavaScriptCore	       0x12e190ac8 JSC::JITPlan::compileInThread(JSC::JITWorklistThread*)
11  com.apple.JavaScriptCore	       0x12e1edee4 JSC::JITWorklistThread::work()
12  com.apple.JavaScriptCore	       0x12c68a2d4 WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const
13  com.apple.JavaScriptCore	       0x12c689e84 WTF::Detail::CallableWrapper<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, void>::call()
14  com.apple.JavaScriptCore	       0x12c6a7170 WTF::Function<void ()>::operator()() const
15  com.apple.JavaScriptCore	       0x12c7f7884 WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*)
16  com.apple.JavaScriptCore	       0x12c803fd0 WTF::wtfThreadEntryPoint(void*)
17  libsystem_pthread.dylib 	       0x19ec532e4 _pthread_start + 136 /AppleInternal/Library/BuildRoots/e0873e53-5185-11ef-9a51-9ab6d782fe32/Library/Caches/com.apple.xbs/Sources/libpthread/src/pthread.c:931
18  libsystem_pthread.dylib 	       0x19ec4e0fc thread_start + 8


History:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&test=jquery%2Fattributes.html&test=jquery%2Fevent.html&style=debug&flavor=wk2

Test results:
https://ews-build.webkit.org/#/builders/122/builds/5424

[Radar WebKit Bug Importer]

<rdar://problem/141314075>

[Yusuke Suzuki]

Pull request: https://github.com/WebKit/WebKit/pull/37807

[EWS]

Committed 287713@main (21f6bd52b6bf): <https://commits.webkit.org/287713@main>

Reviewed commits have been landed. Closing PR #37807 and removing active labels.