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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - WebFrame _stringByEvaluatingJavaScriptFromString:forceUserGesture: should assert that it is being called from the &quot;main&quot; thread."
   href="https://bugs.webkit.org/show_bug.cgi?id=154059">154059</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>WebFrame _stringByEvaluatingJavaScriptFromString:forceUserGesture: should assert that it is being called from the &quot;main&quot; thread.
          </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>WebKit Misc.
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>mark.lam&#64;apple.com
          </td>
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      <p>
        <div>
        <pre>This makes it so that misbehaving clients which call it (indirectly) from another thread (not the main thread) will fail faster.  Otherwise, we get potential memory corruption that results in strange crashes elsewhere later.</pre>
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