Bug 222750 – [macOS] imported/w3c/web-platform-tests/html/semantics/scripting-1/the-script-element/css-module/css-module-worker-test.html is a flakey crash and failure

• Component: CSS
• Status: NEW

[Amir Mark Jr]

imported/w3c/web-platform-tests/html/semantics/scripting-1/the-script-element/css-module/css-module-worker-test.html

Is a flakey failure on Big Sur Debug Wk1 and Wk2. It is also a flakey failure on Catalina WK1 and Wk2

It is also flakey crashing on Big Sur Debug Wk1, Catalina Debug WK1 and WK2


History:

https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fsemantics%2Fscripting-1%2Fthe-script-element%2Fcss-module%2Fcss-module-worker-test.html


Text Diff:

--- /Volumes/Data/worker/bigsur-debug-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-script-element/css-module/css-module-worker-test-expected.txt
+++ /Volumes/Data/worker/bigsur-debug-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-script-element/css-module/css-module-worker-test-actual.txt
@@ -1,5 +1,7 @@
+
+Harness Error (TIMEOUT), message = null
 
 PASS A static import CSS Module within a web worker should not load.
-PASS A dynamic import CSS Module within a web worker should not load.
+TIMEOUT A dynamic import CSS Module within a web worker should not load. Test timed out
 PASS A CSS Module within a web worker should not load.
 


Crash Log:

Thread 0:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff717b1dfa mach_msg_trap + 10
1   libsystem_kernel.dylib        	0x00007fff717b2170 mach_msg + 60
2   com.apple.CoreFoundation      	0x00007fff37607ef5 __CFRunLoopServiceMachPort + 247
3   com.apple.CoreFoundation      	0x00007fff376069c2 __CFRunLoopRun + 1319
4   com.apple.CoreFoundation      	0x00007fff37605e3e CFRunLoopRunSpecific + 462
5   DumpRenderTree                	0x000000010667fc62 runTest(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) + 3218 (DumpRenderTree.mm:2029)

[Radar WebKit Bug Importer]

<rdar://problem/75046557>

[Alexey Proskuryakov]

The crash is on a different thread, and might be caused by a preceding test. This one does use workers though.

ASSERTION FAILED: m_globalScope->hasOneRef()
./workers/WorkerOrWorkletThread.cpp(154) : void WebCore::WorkerOrWorkletThread::workerOrWorkletThread()
1   0x362156129 WTFCrash
2   0x3406be43b WTFCrashWithInfo(int, char const*, char const*, int)
3   0x3458386ea WebCore::WorkerOrWorkletThread::workerOrWorkletThread()
4   0x34586eeeb WebCore::WorkerThread::createThread()::$_0::operator()() const
5   0x34586ee9e WTF::Detail::CallableWrapper<WebCore::WorkerThread::createThread()::$_0, void>::call()
6   0x362181802 WTF::Function<void ()>::operator()() const
7   0x362246298 WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*)
8   0x362254128 WTF::wtfThreadEntryPoint(void*)

[Amir Mark Jr]

This is also flakey failing on EWS:

https://ews-build.webkit.org/#/builders/57/builds/4983

[Amir Mark Jr]

Updated test expectations: 

https://trac.webkit.org/changeset/275441/webkit

[Ryan Haddad]

The flakiness isn't limited to debug. Updated test expectations in r276508