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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>207267</bug_id>
          
          <creation_ts>2020-02-05 07:38:14 -0800</creation_ts>
          <short_desc>[ Mac wk2 ] webgpu/whlsl/ensure-proper-variable-lifetime.html is flaky ImageOnlyFailure.</short_desc>
          <delta_ts>2020-09-03 17:59:47 -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>WebGPU</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Mac</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>NEW</bug_status>
          <resolution></resolution>
          
          <see_also>https://bugs.webkit.org/show_bug.cgi?id=207199</see_also>
    
    <see_also>https://bugs.webkit.org/show_bug.cgi?id=207200</see_also>
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Jason Lawrence">Lawrence.j</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>rackler</cc>
    
    <cc>tsavell</cc>
    
    <cc>webkit-bot-watchers-bugzilla</cc>
    
    <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1615033</commentid>
    <comment_count>0</comment_count>
    <who name="Jason Lawrence">Lawrence.j</who>
    <bug_when>2020-02-05 07:38:14 -0800</bug_when>
    <thetext>webgpu/whlsl/ensure-proper-variable-lifetime.html

Description:
This test is flaky failing on Mac wk2. There are other webgpu tests with similar results which I will relate.

History:
https://results.webkit.org/?suite=layout-tests&amp;test=webgpu%2Fwhlsl%2Fensure-proper-variable-lifetime.html&amp;limit=50000

Diff:
https://build.webkit.org/results/Apple-Catalina-Debug-WK2-Tests/r255810%20(2131)/webgpu/whlsl/ensure-proper-variable-lifetime-diff.png</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1615034</commentid>
    <comment_count>1</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2020-02-05 07:38:37 -0800</bug_when>
    <thetext>&lt;rdar://problem/59187793&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1615037</commentid>
    <comment_count>2</comment_count>
      <attachid>389806</attachid>
    <who name="Jason Lawrence">Lawrence.j</who>
    <bug_when>2020-02-05 07:47:58 -0800</bug_when>
    <thetext>Created attachment 389806
Update Test Expectations</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1615038</commentid>
    <comment_count>3</comment_count>
      <attachid>389806</attachid>
    <who name="Truitt Savell">tsavell</who>
    <bug_when>2020-02-05 07:54:11 -0800</bug_when>
    <thetext>Comment on attachment 389806
Update Test Expectations

Clearing flags on attachment: 389806

Committed r255811: &lt;https://trac.webkit.org/changeset/255811&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1615359</commentid>
    <comment_count>4</comment_count>
    <who name="Jason Lawrence">Lawrence.j</who>
    <bug_when>2020-02-05 15:55:51 -0800</bug_when>
    <thetext>I am able to reproduce this issue with the following command:
run-webkit-tests xxx webgpu/whlsl/ensure-proper-variable-lifetime.html --iterations 5000 -f --exit-after-n-failures 5 -g --force

[106/5000] webgpu/whlsl/ensure-proper-variable-lifetime.html failed unexpectedly (reference mismatch)
[212/5000] webgpu/whlsl/ensure-proper-variable-lifetime.html failed unexpectedly (reference mismatch)
[259/5000] webgpu/whlsl/ensure-proper-variable-lifetime.html failed unexpectedly (reference mismatch)
[290/5000] webgpu/whlsl/ensure-proper-variable-lifetime.html failed unexpectedly (reference mismatch)
[617/5000] webgpu/whlsl/ensure-proper-variable-lifetime.html failed unexpectedly (reference mismatch)
Exiting early after 5 failures. 614 tests run.


609 tests ran as expected, 5 didn&apos;t (4386 didn&apos;t run):


Regressions: Unexpected image-only failures (1)
  webgpu/whlsl/ensure-proper-variable-lifetime.html [ ImageOnlyFailure ]</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1615361</commentid>
    <comment_count>5</comment_count>
    <who name="Jason Lawrence">Lawrence.j</who>
    <bug_when>2020-02-05 15:56:56 -0800</bug_when>
    <thetext>I was able to reproduce the issue on 255856.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1685522</commentid>
    <comment_count>6</comment_count>
    <who name="Karl Rackler">rackler</who>
    <bug_when>2020-09-03 17:59:47 -0700</bug_when>
    <thetext>Description:
webgpu/whlsl/ensure-proper-variable-lifetime.html

This is a flaky imageonlyfailure.

The first image failure that I see this on the dashboard was 10/152019 at r251120, but it was not a commit that seemed relevant that would have caused this.

It appears the original test expectations were set to failure instead of imageonlyfailure.  Modifying/correcting text expectation in https://trac.webkit.org/changeset/266564/webkit

I attempted to reproduce the imageonlyfailure using the previously used reproduction steps, but was unable to reproduce using those or other combinations I tried at this time.

The test was expecting a blue square outline with white background and center, and received a white square outline with black background and center.
History:
https://results.webkit.org/?suite=layout-tests&amp;test=webgpu%2Fwhlsl%2Fensure-proper-variable-lifetime.html&amp;limit=50000

Diff:
https://build.webkit.org/results/Apple-Catalina-Debug-WK2-Tests/r266535%20(6417)/webgpu/whlsl/ensure-proper-variable-lifetime-diff.png</thetext>
  </long_desc>
      
          <attachment
              isobsolete="0"
              ispatch="1"
              isprivate="0"
          >
            <attachid>389806</attachid>
            <date>2020-02-05 07:47:58 -0800</date>
            <delta_ts>2020-02-05 07:54:11 -0800</delta_ts>
            <desc>Update Test Expectations</desc>
            <filename>bug-207267-20200205074757.patch</filename>
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            <size>1364</size>
            <attacher name="Jason Lawrence">Lawrence.j</attacher>
            
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