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    <body><span class="vcard"><a class="email" href="mailto:adachan&#64;apple.com" title="Ada Chan &lt;adachan&#64;apple.com&gt;"> <span class="fn">Ada Chan</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - -[AVPlayerItem currentTime] and -[AVPlayer isExternalPlaybackActive] deadlock"
   href="https://bugs.webkit.org/show_bug.cgi?id=147085">bug 147085</a>
        <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
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         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>ASSIGNED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Assignee</td>
           <td>webkit-unassigned&#64;lists.webkit.org
           </td>
           <td>adachan&#64;apple.com
           </td>
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            <b><a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - -[AVPlayerItem currentTime] and -[AVPlayer isExternalPlaybackActive] deadlock"
   href="https://bugs.webkit.org/show_bug.cgi?id=147085#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - -[AVPlayerItem currentTime] and -[AVPlayer isExternalPlaybackActive] deadlock"
   href="https://bugs.webkit.org/show_bug.cgi?id=147085">bug 147085</a>
              from <span class="vcard"><a class="email" href="mailto:adachan&#64;apple.com" title="Ada Chan &lt;adachan&#64;apple.com&gt;"> <span class="fn">Ada Chan</span></a>
</span></b>
        <pre>Eric Carlson suggested this change:

 void AudioContext::isPlayingAudioDidChange()
 {
-    document()-&gt;updateIsPlayingMedia();
+    RefPtr&lt;AudioContext&gt; strongThis(this);
+    callOnMainThread([strongThis] {
+        strongThis-&gt;document()-&gt;updateIsPlayingMedia();
+    });
 }

I could reproduce this deadlock before this change, and could not reproduce the deadlock anymore after this change.

Posting a patch very soon.</pre>
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