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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - ASSERT(!throwScope.exception()) on imported/w3c/web-platform-tests/fetch/api/cors/cors-preflight-status.html"
   href="https://bugs.webkit.org/show_bug.cgi?id=170395">170395</a>
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        </tr>

        <tr>
          <th>Summary</th>
          <td>ASSERT(!throwScope.exception()) on imported/w3c/web-platform-tests/fetch/api/cors/cors-preflight-status.html
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>WebKit Local 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>JavaScriptCore
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>ap&#64;webkit.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>mark.lam&#64;apple.com, ryanhaddad&#64;apple.com, webkit-bug-importer&#64;group.apple.com, youennf&#64;gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>imported/w3c/web-platform-tests/fetch/api/cors/cors-preflight-status.html very frequently asserts:

<a href="https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&amp;tests=imported%2Fw3c%2Fweb-platform-tests%2Ffetch%2Fapi%2Fcors%2Fcors-preflight-status.html">https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&amp;tests=imported%2Fw3c%2Fweb-platform-tests%2Ffetch%2Fapi%2Fcors%2Fcors-preflight-status.html</a>

Thread 24 Crashed:: WebCore: Worker
0   com.apple.JavaScriptCore            0x0000000111327457 WTFCrash + 39 (Assertions.cpp:323)
1   com.apple.JavaScriptCore            0x00000001109d968d JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;) + 205 (Interpreter.cpp:897)
2   com.apple.JavaScriptCore            0x000000011013879e JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;) + 190 (CallData.cpp:39)
3   com.apple.WebCore                   0x00000001199ecc9f WebCore::DeferredPromise::callFunction(JSC::ExecState&amp;, JSC::JSValue, JSC::JSValue) + 287 (JSDOMPromise.cpp:59)
4   com.apple.WebCore                   0x0000000119440d15 WebCore::DeferredPromise::reject(JSC::ExecState&amp;, JSC::JSValue) + 85 (JSDOMPromise.h:127)
5   com.apple.WebCore                   0x00000001199ed16f WebCore::DeferredPromise::reject(int, WTF::String const&amp;) + 287 (JSDOMPromise.cpp:109)
6   com.apple.WebCore                   0x0000000119031cd7 void WebCore::DOMPromiseBase::reject&lt;WebCore::$_0&gt;(WebCore::$_0&amp;&amp;) + 71 (JSDOMPromise.h:167)
7   com.apple.WebCore                   0x0000000119031b38 WebCore::FetchResponse::BodyLoader::didFail() + 264 (FetchResponse.cpp:141)
8   com.apple.WebCore                   0x000000011902d269 WebCore::FetchLoader::didFail(WebCore::ResourceError const&amp;) + 41 (FetchLoader.cpp:152)</pre>
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