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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - imported/w3c/web-platform-tests/service-workers/cache-storage/worker/cache-put.https.html is sometimes crashing on High Sierra Debug WK2"
   href="https://bugs.webkit.org/show_bug.cgi?id=178345">178345</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>imported/w3c/web-platform-tests/service-workers/cache-storage/worker/cache-put.https.html is sometimes crashing on High Sierra Debug WK2
          </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>Unspecified
          </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>WebCore Misc.
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>youennf@gmail.com
          </td>
        </tr></table>
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        <pre>Crash log is 
As per <a href="https://build.webkit.org/builders/Apple%20High%20Sierra%20Debug%20WK2%20(Tests)/builds/334">https://build.webkit.org/builders/Apple%20High%20Sierra%20Debug%20WK2%20(Tests)/builds/334</a> and <a href="https://build.webkit.org/results/Apple%20High%20Sierra%20Debug%20WK2%20(Tests)/r223332%20(334)/imported/w3c/web-platform-tests/service-workers/cache-storage/worker/cache-put.https-crash-log.txt">https://build.webkit.org/results/Apple%20High%20Sierra%20Debug%20WK2%20(Tests)/r223332%20(334)/imported/w3c/web-platform-tests/service-workers/cache-storage/worker/cache-put.https-crash-log.txt</a>

Thread 18 Crashed:: WebCore: Worker
0   com.apple.JavaScriptCore            0x000000039ecc89d4 WTFCrash + 36 (Assertions.cpp:270)
1   com.apple.WebCore                   0x0000000391446ba8 WebCore::DOMGuardedObject::clear() + 104 (JSDOMGuardedObject.cpp:50)
2   com.apple.WebCore                   0x0000000391446ee8 WebCore::DOMGuardedObject::contextDestroyed() + 40 (JSDOMGuardedObject.cpp:62)
3   com.apple.WebCore                   0x0000000392808369 WebCore::ScriptExecutionContext::~ScriptExecutionContext() + 137 (ScriptExecutionContext.cpp:115)
4   com.apple.WebCore                   0x000000039301d581 WebCore::WorkerGlobalScope::~WorkerGlobalScope() + 977 (WorkerGlobalScope.cpp:95)
5   com.apple.WebCore                   0x000000039072d305 WebCore::DedicatedWorkerGlobalScope::~DedicatedWorkerGlobalScope() + 21 (DedicatedWorkerGlobalScope.cpp:59)
6   com.apple.WebCore                   0x000000039072d325 WebCore::DedicatedWorkerGlobalScope::~DedicatedWorkerGlobalScope() + 21 (DedicatedWorkerGlobalScope.cpp:59)
7   com.apple.WebCore                   0x000000039072d379 WebCore::DedicatedWorkerGlobalScope::~DedicatedWorkerGlobalScope() + 25 (DedicatedWorkerGlobalScope.cpp:58)
8   com.apple.WebCore                   0x000000039072e181 WTF::RefCounted<WebCore::WorkerGlobalScope>::deref() const + 81 (RefCounted.h:145)
9   com.apple.WebCore                   0x0000000391ea9307 void WTF::derefIfNotNull<WebCore::WorkerGlobalScope>(WebCore::WorkerGlobalScope*) + 55 (RefPtr.h:46)
10  com.apple.WebCore                   0x000000039304215b WTF::RefPtr<WebCore::WorkerGlobalScope>::operator=(std::nullptr_t) + 91 (RefPtr.h:152)
11  com.apple.WebCore                   0x0000000393041f19 WebCore::WorkerThread::workerThread() + 1689 (WorkerThread.cpp:217)
12  com.apple.WebCore                   0x0000000393044ea8 WebCore::WorkerThread::start()::$_0::operator()() const + 24 (WorkerThread.cpp:140)
13  com.apple.WebCore                   0x0000000393044e69 WTF::Function<void ()>::CallableWrapper<WebCore::WorkerThread::start()::$_0>::call() + 25 (Function.h:101)
14  com.apple.JavaScriptCore            0x000000039ecfe35b WTF::Function<void ()>::operator()() const + 139 (Function.h:56)
15  com.apple.JavaScriptCore            0x000000039ed4b36f WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*) + 351 (Threading.cpp:129)
16  com.apple.JavaScriptCore            0x000000039ed50bc5 WTF::wtfThreadEntryPoint(void*) + 21 (ThreadingPthreads.cpp:223)
17  libsystem_pthread.dylib             0x00007fff515636c1 _pthread_body + 340
18  libsystem_pthread.dylib             0x00007fff5156356d _pthread_start + 377
19  libsystem_pthread.dylib             0x00007fff51562c5d thread_start + 13</pre>
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