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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 - iOS DumpRenderTreeApp always asserts running compositing/masks/toggle-mask.html"
   href="https://bugs.webkit.org/show_bug.cgi?id=168149">168149</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>iOS DumpRenderTreeApp always asserts running  compositing/masks/toggle-mask.html
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </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>Tools / Tests
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>simon.fraser&#64;apple.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>lforschler&#64;apple.com
          </td>
        </tr></table>
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        <div>
        <pre>ASSERTION FAILED: pthread_main_np()
/Volumes/Data/Development/OSX/webkit/OpenSource/Source/WTF/wtf/RunLoop.cpp(54) : static void WTF::RunLoop::initializeMainRunLoop()
1   0x114bef3bd WTFCrash
2   0x114c37cdb WTF::RunLoop::initializeMainRunLoop()
3   0x1170dd88c WebKit::InitializeWebKit2(WebKit::ProcessType)
4   0x116af129a API::Object::Object()
5   0x116ae061f API::ObjectImpl&lt;(API::Object::Type)22&gt;::ObjectImpl()
6   0x116ae0530 API::String::String(WTF::String&amp;&amp;)
7   0x116ae041d API::String::String(WTF::String&amp;&amp;)
8   0x116ae0340 API::String::create(WTF::String&amp;&amp;)
9   0x116adf7c4 API::String::create(WTF::String const&amp;)
10  0x1174b608c WebKit::toCopiedAPI(WTF::String const&amp;)
11  0x11759b45b WKStringCreateWithCFString
12  0x10244ec88 dumpFramesAsText(WebFrame*)
13  0x10244e4ed dump()
14  0x1024995da TestRunner::notifyDone()
15  0x102487956 notifyDoneCallback(OpaqueJSContext const*, OpaqueJSValue*, OpaqueJSValue*, unsigned long, OpaqueJSValue const* const*, OpaqueJSValue const**)
16  0x1146e5667 long long JSC::APICallbackFunction::call&lt;JSC::JSCallbackFunction&gt;(JSC::ExecState*)
17  0x1148748ea JSC::LLInt::handleHostCall(JSC::ExecState*, JSC::Instruction*, JSC::JSValue, JSC::CodeSpecializationKind)
18  0x11487073d JSC::LLInt::setUpCall(JSC::ExecState*, JSC::Instruction*, JSC::CodeSpecializationKind, JSC::JSValue, JSC::LLIntCallLinkInfo*)
19  0x11486fa04 JSC::LLInt::genericCall(JSC::ExecState*, JSC::Instruction*, JSC::CodeSpecializationKind)
20  0x11486f8f3 llint_slow_path_call
21  0x11487dca9 llint_entry
22  0x11487657e vmEntryToJavaScript
23  0x114688abe JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
24  0x11463d74f JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;)
25  0x113f74d78 JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;)
26  0x113f74e89 JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;, WTF::NakedPtr&lt;JSC::Exception&gt;&amp;)
27  0x113f7511d JSC::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;, WTF::NakedPtr&lt;JSC::Exception&gt;&amp;)
28  0x10aa9253b WebCore::JSMainThreadExecState::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;, WTF::NakedPtr&lt;JSC::Exception&gt;&amp;)
29  0x10bd94d8a WebCore::ScheduledAction::executeFunctionInContext(JSC::JSGlobalObject*, JSC::JSValue, WebCore::ScriptExecutionContext&amp;)
30  0x10bd94981 WebCore::ScheduledAction::execute(WebCore::Document&amp;)
31  0x10bd94843 WebCore::ScheduledAction::execute(WebCore::ScriptExecutionContext&amp;)</pre>
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