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<!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>36972</bug_id>
          
          <creation_ts>2010-04-01 10:39:22 -0700</creation_ts>
          <short_desc>fast/canvas/webgl/index-validation.html failed randomly if antialias is on</short_desc>
          <delta_ts>2010-04-22 05:28:59 -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>WebGL</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>PC</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="Zhenyao Mo">zmo</reporter>
          <assigned_to name="Zhenyao Mo">zmo</assigned_to>
          <cc>commit-queue</cc>
    
    <cc>eric</cc>
    
    <cc>kbr</cc>
    
    <cc>oliver</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>207241</commentid>
    <comment_count>0</comment_count>
    <who name="Zhenyao Mo">zmo</who>
    <bug_when>2010-04-01 10:39:22 -0700</bug_when>
    <thetext>See https://bugs.webkit.org/show_bug.cgi?id=33416

This random failure might be caused by a hardware/driver bug, likely some unwanted competition is going on.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>207242</commentid>
    <comment_count>1</comment_count>
    <who name="Zhenyao Mo">zmo</who>
    <bug_when>2010-04-01 10:41:43 -0700</bug_when>
    <thetext>Observation (not sure if it&apos;s of any value): I used to be able to reproduce this failure on my Mac the first run after I just rebuilt the webkit, but not any later runs; right now I am unable to reproduce it on my machine anymore.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>207278</commentid>
    <comment_count>2</comment_count>
    <who name="Zhenyao Mo">zmo</who>
    <bug_when>2010-04-01 11:39:28 -0700</bug_when>
    <thetext>Another report of the same issue.

http://lists.apple.com/archives/mac-opengl/2009/Dec/msg00010.html</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>209802</commentid>
    <comment_count>3</comment_count>
    <who name="Eric Seidel (no email)">eric</who>
    <bug_when>2010-04-07 13:21:12 -0700</bug_when>
    <thetext>If this is a bug in Mac OS X software, you need to report it at http://radar.apple.com/ to have it looked at.  This tracker is only for WebKit bugs.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>209813</commentid>
    <comment_count>4</comment_count>
    <who name="Zhenyao Mo">zmo</who>
    <bug_when>2010-04-07 13:42:38 -0700</bug_when>
    <thetext>Yes, we will file a bug there.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>215622</commentid>
    <comment_count>5</comment_count>
    <who name="Zhenyao Mo">zmo</who>
    <bug_when>2010-04-21 18:25:42 -0700</bug_when>
    <thetext>Seems like the issue is not hardware/driver bug, but the uninitialized variables in Mac port.

See https://bugs.webkit.org/show_bug.cgi?id=36908

Going to turn on anti-alias / stencil again as default canvas attributes for tests.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>215629</commentid>
    <comment_count>6</comment_count>
      <attachid>54012</attachid>
    <who name="Zhenyao Mo">zmo</who>
    <bug_when>2010-04-21 18:29:00 -0700</bug_when>
    <thetext>Created attachment 54012
patch

Anti-alias and stencil were turned off from default canvas attribute set when we try to pin-point the cause of these random failures; now seems like they are not the cause, we turn them back on.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>215632</commentid>
    <comment_count>7</comment_count>
      <attachid>54012</attachid>
    <who name="Eric Seidel (no email)">eric</who>
    <bug_when>2010-04-21 18:30:12 -0700</bug_when>
    <thetext>Comment on attachment 54012
patch

OK.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>215837</commentid>
    <comment_count>8</comment_count>
      <attachid>54012</attachid>
    <who name="WebKit Commit Bot">commit-queue</who>
    <bug_when>2010-04-22 05:28:53 -0700</bug_when>
    <thetext>Comment on attachment 54012
patch

Clearing flags on attachment: 54012

Committed r58090: &lt;http://trac.webkit.org/changeset/58090&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>215838</commentid>
    <comment_count>9</comment_count>
    <who name="WebKit Commit Bot">commit-queue</who>
    <bug_when>2010-04-22 05:28:59 -0700</bug_when>
    <thetext>All reviewed patches have been landed.  Closing bug.</thetext>
  </long_desc>
      
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            <date>2010-04-21 18:29:00 -0700</date>
            <delta_ts>2010-04-22 05:28:53 -0700</delta_ts>
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