<?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>216275</bug_id>
          
          <creation_ts>2020-09-08 10:17:19 -0700</creation_ts>
          <short_desc>REGRESSION(r266634): [macOS release] 4 layout tests became flaky failures</short_desc>
          <delta_ts>2020-09-10 11:50:50 -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>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          <see_also>https://bugs.webkit.org/show_bug.cgi?id=216012</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>
          
          <blocked>216258</blocked>
          <everconfirmed>1</everconfirmed>
          <reporter name="Ryan Haddad">ryanhaddad</reporter>
          <assigned_to name="Sihui Liu">sihui_liu</assigned_to>
          <cc>darin</cc>
    
    <cc>sihui_liu</cc>
    
    <cc>thorton</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>1686609</commentid>
    <comment_count>0</comment_count>
    <who name="Ryan Haddad">ryanhaddad</who>
    <bug_when>2020-09-08 10:17:19 -0700</bug_when>
    <thetext>The following layout tests have become flaky failures on macOS release bots:

compositing/tiling/tiled-mask-inwindow.html
fast/events/page-visibility-iframe-move-test.html
pageoverlay/overlay-remove-reinsert-view.html
tiled-drawing/tiled-backing-in-window.html

https://results.webkit.org/?suite=layout-tests&amp;suite=layout-tests&amp;suite=layout-tests&amp;suite=layout-tests&amp;test=compositing%2Ftiling%2Ftiled-mask-inwindow.html&amp;test=fast%2Fevents%2Fpage-visibility-iframe-move-test.html&amp;test=pageoverlay%2Foverlay-remove-reinsert-view.html&amp;test=tiled-drawing%2Ftiled-backing-in-window.html</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1686610</commentid>
    <comment_count>1</comment_count>
    <who name="Ryan Haddad">ryanhaddad</who>
    <bug_when>2020-09-08 10:18:38 -0700</bug_when>
    <thetext>I was able to reproduce one of the failures with the following on r266634:
run-webkit-tests compositing/tiling/tiled-mask-inwindow.html --iterations 100 --exit-after-n-failures 1

I could not reproduce with r266629.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1686611</commentid>
    <comment_count>2</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2020-09-08 10:18:57 -0700</bug_when>
    <thetext>&lt;rdar://problem/68515242&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1686613</commentid>
    <comment_count>3</comment_count>
    <who name="Ryan Haddad">ryanhaddad</who>
    <bug_when>2020-09-08 10:20:04 -0700</bug_when>
    <thetext>Not sure if this is fixed by the patch in https://bugs.webkit.org/show_bug.cgi?id=216261</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1686912</commentid>
    <comment_count>4</comment_count>
      <attachid>408312</attachid>
    <who name="Sihui Liu">sihui_liu</who>
    <bug_when>2020-09-08 23:12:53 -0700</bug_when>
    <thetext>Created attachment 408312
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1687239</commentid>
    <comment_count>5</comment_count>
      <attachid>408403</attachid>
    <who name="Sihui Liu">sihui_liu</who>
    <bug_when>2020-09-09 19:42:04 -0700</bug_when>
    <thetext>Created attachment 408403
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1687260</commentid>
    <comment_count>6</comment_count>
      <attachid>408403</attachid>
    <who name="Darin Adler">darin</who>
    <bug_when>2020-09-09 20:33:18 -0700</bug_when>
    <thetext>Comment on attachment 408403
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=408403&amp;action=review

&gt; Source/WebKit/ChangeLog:10
&gt; +        transation is committed in UI process. To make sure web process picks up the changes, we need to invoke the 

typo: &quot;transition&quot;

&gt; Source/WebKit/UIProcess/API/Cocoa/WKWebViewPrivate.h:357
&gt; +- (void)_doAfterActivityStateUpdate:(void (^)(void))completionHandler WK_API_AVAILABLE(macos(WK_MAC_TBA), ios(WK_IOS_TBA));

Why is this not in WKWebViewPrivateForTesting.h?</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1687261</commentid>
    <comment_count>7</comment_count>
      <attachid>408403</attachid>
    <who name="Darin Adler">darin</who>
    <bug_when>2020-09-09 20:33:39 -0700</bug_when>
    <thetext>Comment on attachment 408403
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=408403&amp;action=review

&gt; LayoutTests/fast/events/page-visibility-iframe-move-test.html:58
&gt; +    debug(&quot;VisibilityChanage event is received&quot;);

typo: &quot;VisibilityChange&quot;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1687278</commentid>
    <comment_count>8</comment_count>
      <attachid>408403</attachid>
    <who name="Sihui Liu">sihui_liu</who>
    <bug_when>2020-09-09 23:03:34 -0700</bug_when>
    <thetext>Comment on attachment 408403
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=408403&amp;action=review

&gt;&gt; Source/WebKit/UIProcess/API/Cocoa/WKWebViewPrivate.h:357
&gt;&gt; +- (void)_doAfterActivityStateUpdate:(void (^)(void))completionHandler WK_API_AVAILABLE(macos(WK_MAC_TBA), ios(WK_IOS_TBA));
&gt; 
&gt; Why is this not in WKWebViewPrivateForTesting.h?

ah, will move it to WKWebViewPrivateForTesting.h!</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1687279</commentid>
    <comment_count>9</comment_count>
      <attachid>408415</attachid>
    <who name="Sihui Liu">sihui_liu</who>
    <bug_when>2020-09-09 23:04:40 -0700</bug_when>
    <thetext>Created attachment 408415
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1687438</commentid>
    <comment_count>10</comment_count>
      <attachid>408415</attachid>
    <who name="Tim Horton">thorton</who>
    <bug_when>2020-09-10 10:28:26 -0700</bug_when>
    <thetext>Comment on attachment 408415
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=408415&amp;action=review

&gt; Source/WebKit/UIProcess/API/Cocoa/WKWebViewPrivateForTesting.h:79
&gt; +- (void)_doAfterActivityStateUpdate:(void (^)(void))completionHandler;

Nice!</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1687482</commentid>
    <comment_count>11</comment_count>
    <who name="EWS">ews-feeder</who>
    <bug_when>2020-09-10 11:50:49 -0700</bug_when>
    <thetext>Committed r266847: &lt;https://trac.webkit.org/changeset/266847&gt;

All reviewed patches have been landed. Closing bug and clearing flags on attachment 408415.</thetext>
  </long_desc>
      
          <attachment
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            <attachid>408312</attachid>
            <date>2020-09-08 23:12:53 -0700</date>
            <delta_ts>2020-09-09 19:42:02 -0700</delta_ts>
            <desc>Patch</desc>
            <filename>bug-216275-20200908231252.patch</filename>
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          </attachment>
          <attachment
              isobsolete="1"
              ispatch="1"
              isprivate="0"
          >
            <attachid>408403</attachid>
            <date>2020-09-09 19:42:04 -0700</date>
            <delta_ts>2020-09-09 23:04:39 -0700</delta_ts>
            <desc>Patch</desc>
            <filename>bug-216275-20200909194202.patch</filename>
            <type>text/plain</type>
            <size>12611</size>
            <attacher name="Sihui Liu">sihui_liu</attacher>
            
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          </attachment>
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              ispatch="1"
              isprivate="0"
          >
            <attachid>408415</attachid>
            <date>2020-09-09 23:04:40 -0700</date>
            <delta_ts>2020-09-10 11:50:49 -0700</delta_ts>
            <desc>Patch</desc>
            <filename>bug-216275-20200909230439.patch</filename>
            <type>text/plain</type>
            <size>12480</size>
            <attacher name="Sihui Liu">sihui_liu</attacher>
            
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</data>

          </attachment>
      

    </bug>

</bugzilla>