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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [ BigSur arm64 EWS ] ASSERTION FAILED: m_globalScope->hasOneRef() ./workers/WorkerOrWorkletThread.cpp(155) : void WebCore::WorkerOrWorkletThread::workerOrWorkletThread()"
   href="https://bugs.webkit.org/show_bug.cgi?id=230109">230109</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[ BigSur arm64 EWS ] ASSERTION FAILED: m_globalScope->hasOneRef() ./workers/WorkerOrWorkletThread.cpp(155) : void WebCore::WorkerOrWorkletThread::workerOrWorkletThread()
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Mac (Apple Silicon)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>New Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned@lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>ayumi_kojima@apple.com
          </td>
        </tr></table>
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        <pre>imported/w3c/web-platform-tests/workers/modules/dedicated-worker-import-blob-url.any.html

Is a flaky crash on macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS

In the open source directory, I don't see any crash but it failed a couple of times in the history: <a href="https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fworkers%2Fmodules%2Fdedicated-worker-import-blob-url.any.html">https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fworkers%2Fmodules%2Fdedicated-worker-import-blob-url.any.html</a>

Builds that the test failed:

<a href="https://build.webkit.org/#/builders/70/builds/4727">https://build.webkit.org/#/builders/70/builds/4727</a>
<a href="https://build.webkit.org/#/builders/13/builds/4168">https://build.webkit.org/#/builders/13/builds/4168</a>
<a href="https://build.webkit.org/#/builders/45/builds/1320">https://build.webkit.org/#/builders/45/builds/1320</a>

The test started being flaky on EWS at <a href="https://ews-build.webkit.org/#/builders/60/builds/11578">https://ews-build.webkit.org/#/builders/60/builds/11578</a>

Stderr:

ASSERTION FAILED: m_globalScope->hasOneRef()
./workers/WorkerOrWorkletThread.cpp(155) : void WebCore::WorkerOrWorkletThread::workerOrWorkletThread()
1   0x139dc759c WTFCrash
2   0x11986d8d0 WTFCrashWithInfo(int, char const*, char const*, int)
3   0x11d9b6818 WebCore::WorkerOrWorkletThread::workerOrWorkletThread()
4   0x11da08c0c WebCore::WorkerThread::createThread()::$_1::operator()() const
5   0x11da08b88 WTF::Detail::CallableWrapper<WebCore::WorkerThread::createThread()::$_1, void>::call()
6   0x139df0ee0 WTF::Function<void ()>::operator()() const
7   0x139ec05d4 WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*)
8   0x139ecebf4 WTF::wtfThreadEntryPoint(void*)
9   0x180d8b878 _pthread_start
10  0x180d865e0 thread_start
com.apple.WebKit.WebContent.Development terminated (pid 77307) because the process crashed
LEAK: 1 WebPageProxy</pre>
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