Bug 299131 – REGRESSION(298805@main?): [macOS Release] inspector/unit-tests/target-manager.html is a flaky crash

• Component: New Bugs
• Status: NEW

[Marta Darbinyan]

The following test is flaky failure on several PRs in EWS. In post-commit it crashes intermittently with JSC::ShadowChicken error. 

inspector/unit-tests/target-manager.html

 Thread 10 Crashed:: Dispatch queue: 
0  com.apple.JavaScriptCore	       0x1069f2bb0 JSC::ShadowChicken::update(JSC::VM&, JSC::CallFrame*) (.cold.3)
1  com.apple.JavaScriptCore	       0x105fea7fc JSC::ShadowChicken::update(JSC::VM&, JSC::CallFrame*)
2  com.apple.JavaScriptCore	       0x10604deb0 JSC::genericUnwind(JSC::VM&, JSC::CallFrame*)
3  com.apple.JavaScriptCore	       0x106156060 llint_slow_path_handle_exception
4  com.apple.JavaScriptCore	       0x106a373ac llint_entry
5  com.apple.JavaScriptCore	       0x106a228b4 vmEntryToJavaScript
6  com.apple.JavaScriptCore	       0x105fe4178 JSC::Interpreter::executeProgram(JSC::SourceCode const&, JSC::JSGlobalObject*, JSC::JSObject*)
7  com.apple.JavaScriptCore	       0x1062105a8 JSC::evaluate(JSC::JSGlobalObject*, JSC::SourceCode const&, JSC::JSValue, WTF::NakedPtr<JSC::Exception>&)
8  com.apple.WebCore       	       0x12107d810 WebCore::WorkerOrWorkletScriptController::evaluate(WebCore::ScriptSourceCode const&, WTF::NakedPtr<JSC::Exception>&, WTF::String*)
9  com.apple.WebCore       	       0x121084754 WebCore::WorkerOrWorkletScriptController::evaluate(WebCore::ScriptSourceCode const&, WTF::String*)
10  com.apple.WebCore       	       0x1210959cc WebCore::WorkerThread::evaluateScriptIfNecessary(WTF::String&)
11  com.apple.WebCore       	       0x1210901ec WebCore::WorkerOrWorkletThread::workerOrWorkletThread()
12  com.apple.JavaScriptCore	       0x1054525fc WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*)
13  com.apple.JavaScriptCore	       0x105454a20 WTF::wtfThreadEntryPoint(void*)
14  libsystem_pthread.dylib 	       0x182991f94 _pthread_start + 136 /AppleInternal/Library/BuildRoots/289ffcb4-455d-11ef-953d-e2437461156c/Library/Caches/com.apple.xbs/Sources/libpthread/src/pthread.c:931
15  libsystem_pthread.dylib 	       0x18298cd34 thread_start + 8

Test result:
https://ews-build.webkit.org/#/builders/136/builds/27201

Test history:
https://results.webkit.org/?suite=layout-tests&test=inspector%2Funit-tests%2Ftarget-manager.html

[Radar WebKit Bug Importer]

<rdar://problem/160891742>

[EWS]

Test gardening commit 300194@main (f39dcf4deddb): <https://commits.webkit.org/300194@main>

Reviewed commits have been landed. Closing PR #50960 and removing active labels.