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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 - REGRESSION (r190370): CrashTracer: [USER] com.apple.WebKit.WebContent at com.apple.JavaScriptCore: JSC::JITCode::execute + 158"
   href="https://bugs.webkit.org/show_bug.cgi?id=151279">151279</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>REGRESSION (r190370): CrashTracer: [USER] com.apple.WebKit.WebContent at com.apple.JavaScriptCore: JSC::JITCode::execute + 158
          </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>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </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>msaboff&#64;apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>We are crashing loading airbnb.com with a back trace like:

<span class="quote">&gt;  1 com.apple.JavaScriptCore       0x7fff8ce0c7ee JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) + 0x9e</span >
   2 com.apple.JavaScriptCore       0x7fff8c92616b JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;) + 0x1bb
   3 com.apple.JavaScriptCore       0x7fff8c925f9e JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&amp;, JSC::JSValue, JSC::ArgList const&amp;) + 0x3e
   4 com.apple.JavaScriptCore       0x7fff8ca569da JSC::boundFunctionCall(JSC::ExecState*) + 0x27a
   5                                0x00003851da001028 0 + 61924200943656
   6 com.apple.JavaScriptCore       0x7fff8cf12941 llint_entry + 0x5ae9
   7 com.apple.JavaScriptCore       0x7fff8cf12941 llint_entry + 0x5ae9
   8 com.apple.JavaScriptCore       0x7fff8cf12941 llint_entry + 0x5ae9
   9 com.apple.JavaScriptCore       0x7fff8cf12941 llint_entry + 0x5ae9
  10 com.apple.JavaScriptCore       0x7fff8cf12941 llint_entry + 0x5ae9
...

&lt;rdar://problem/23484769&gt;</pre>
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      </p>
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      <ul>
          <li>You are the assignee for the bug.</li>
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