<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>57155</bug_id>
          
          <creation_ts>2011-03-26 11:18:46 -0700</creation_ts>
          <short_desc>Fix a possible deadlock when two synchronous messages are sent at the same time</short_desc>
          <delta_ts>2011-03-26 11:23:57 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>New Bugs</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>Other</rep_platform>
          <op_sys>OS X 10.5</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords></keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Anders Carlsson">andersca</reporter>
          <assigned_to name="Anders Carlsson">andersca</assigned_to>
          
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>373917</commentid>
    <comment_count>0</comment_count>
    <who name="Anders Carlsson">andersca</who>
    <bug_when>2011-03-26 11:18:46 -0700</bug_when>
    <thetext>Fix a possible deadlock when two synchronouse messages are sent at the same time</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>373918</commentid>
    <comment_count>1</comment_count>
      <attachid>87030</attachid>
    <who name="Anders Carlsson">andersca</who>
    <bug_when>2011-03-26 11:21:58 -0700</bug_when>
    <thetext>Created attachment 87030
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>373920</commentid>
    <comment_count>2</comment_count>
    <who name="Anders Carlsson">andersca</who>
    <bug_when>2011-03-26 11:23:57 -0700</bug_when>
    <thetext>Committed r82032: &lt;http://trac.webkit.org/changeset/82032&gt;</thetext>
  </long_desc>
      
          <attachment
              isobsolete="0"
              ispatch="1"
              isprivate="0"
          >
            <attachid>87030</attachid>
            <date>2011-03-26 11:21:58 -0700</date>
            <delta_ts>2011-03-26 11:23:08 -0700</delta_ts>
            <desc>Patch</desc>
            <filename>bug-57155-20110326112157.patch</filename>
            <type>text/plain</type>
            <size>6655</size>
            <attacher name="Anders Carlsson">andersca</attacher>
            
              <data encoding="base64">SW5kZXg6IFNvdXJjZS9XZWJLaXQyL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09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</data>
<flag name="review"
          id="79418"
          type_id="1"
          status="+"
          setter="sam"
    />
          </attachment>
      

    </bug>

</bugzilla>