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    <body><span class="vcard"><a class="email" href="mailto:david.majnemer@gmail.com" title="David Majnemer <david.majnemer@gmail.com>"> <span class="fn">David Majnemer</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - Infrequent deadlocks with std::future"
   href="http://llvm.org/bugs/show_bug.cgi?id=21995">bug 21995</a>
        <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>INVALID
           </td>
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            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - Infrequent deadlocks with std::future"
   href="http://llvm.org/bugs/show_bug.cgi?id=21995#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - Infrequent deadlocks with std::future"
   href="http://llvm.org/bugs/show_bug.cgi?id=21995">bug 21995</a>
              from <span class="vcard"><a class="email" href="mailto:david.majnemer@gmail.com" title="David Majnemer <david.majnemer@gmail.com>"> <span class="fn">David Majnemer</span></a>
</span></b>
        <pre>Upon greater reflection, it's been made aware to me that you are not permitted
to race promise::set_value with its destructor.  The only thing that
promise::set_value needs to do atomically is to atomically *update* the promise
object.

see <a href="http://stackoverflow.com/a/11448290">http://stackoverflow.com/a/11448290</a> and <a href="http://stackoverflow.com/a/12527892">http://stackoverflow.com/a/12527892</a>
for more details.</pre>
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