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      <base href="https://bugs.webkit.org/" />
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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 - DumpRenderTree crashed in com.apple.WebCore: WTF::Optional&lt;WebCore::FetchBodyOwner::BlobLoader&gt;::operator bool const + 12"
   href="https://bugs.webkit.org/show_bug.cgi?id=162483">162483</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>DumpRenderTree crashed in com.apple.WebCore: WTF::Optional&lt;WebCore::FetchBodyOwner::BlobLoader&gt;::operator bool const + 12
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </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&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>youennf&#64;gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Crash log is:
0   com.apple.WebCore                 0x00000001160d269c WTF::Optional&lt;WebCore::FetchBodyOwner::BlobLoader&gt;::operator bool() const + 12
1   com.apple.WebCore                 0x00000001160d14a5 WebCore::FetchBodyOwner::stop() + 213
2   com.apple.WebCore                 0x00000001179428c2 WebCore::ScriptExecutionContext::stopActiveDOMObjects() + 290
3   com.apple.WebCore                 0x0000000118097da9 WebCore::WorkerThread::stop()::$_0::operator()(WebCore::ScriptExecutionContext&amp;) const + 57
4   com.apple.WebCore                 0x0000000118097d47 WTF::Function&lt;void (WebCore::ScriptExecutionContext&amp;)&gt;::CallableWrapper&lt;WebCore::WorkerThread::stop()::$_0&gt;::call(WebCore::ScriptExecutionContext&amp;) + 55
5   com.apple.WebCore                 0x0000000115ef5b57 WTF::Function&lt;void (WebCore::ScriptExecutionContext&amp;)&gt;::operator()(WebCore::ScriptExecutionContext&amp;) const + 119
6   com.apple.WebCore                 0x0000000115ee59fd WebCore::ScriptExecutionContext::Task::performTask(WebCore::ScriptExecutionContext&amp;) + 29
7   com.apple.WebCore                 0x000000011808f6c9 WebCore::WorkerRunLoop::Task::performTask(WebCore::WorkerRunLoop const&amp;, WebCore::WorkerGlobalScope*) + 105
8   com.apple.WebCore                 0x000000011808f4e8 WebCore::WorkerRunLoop::runCleanupTasks(WebCore::WorkerGlobalScope*) + 408
9   com.apple.WebCore                 0x000000011808ed63 WebCore::WorkerRunLoop::run(WebCore::WorkerGlobalScope*) + 115
10  com.apple.WebCore                 0x0000000118097455 WebCore::WorkerThread::runEventLoop() + 53
11  com.apple.WebCore                 0x0000000115e4d2c9 WebCore::DedicatedWorkerThread::runEventLoop() + 89
12  com.apple.WebCore                 0x0000000118097377 WebCore::WorkerThread::workerThread() + 1127
13  com.apple.WebCore                 0x0000000118096f05 WebCore::WorkerThread::workerThreadStart(void*) + 21</pre>
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      </p>
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