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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - ASSERTION FAILED: vm-&gt;heap.mutatorState() == MutatorState::Running || vm-&gt;apiLock().ownerThread() != std::this_thread::get_id()"
   href="https://bugs.webkit.org/show_bug.cgi?id=167322#c1">Comment # 1</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - ASSERTION FAILED: vm-&gt;heap.mutatorState() == MutatorState::Running || vm-&gt;apiLock().ownerThread() != std::this_thread::get_id()"
   href="https://bugs.webkit.org/show_bug.cgi?id=167322">bug 167322</a>
              from <span class="vcard"><a class="email" href="mailto:fpizlo&#64;apple.com" title="Filip Pizlo &lt;fpizlo&#64;apple.com&gt;"> <span class="fn">Filip Pizlo</span></a>
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        <pre>Looks like another jsCast that should be a static_cast.</pre>
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