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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>258096</bug_id>
          
          <creation_ts>2023-06-14 14:34:54 -0700</creation_ts>
          <short_desc>ASSERTION FAILED: firstChild(): [ iOS, macOS Debug ] 2x media/track tests are a flaky crash.</short_desc>
          <delta_ts>2023-06-18 11:27:12 -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>Other</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>NEW</bug_status>
          <resolution></resolution>
          
          <see_also>https://bugs.webkit.org/show_bug.cgi?id=258097</see_also>
    
    <see_also>https://bugs.webkit.org/show_bug.cgi?id=258183</see_also>
    
    <see_also>https://bugs.webkit.org/show_bug.cgi?id=258184</see_also>
    
    <see_also>https://bugs.webkit.org/show_bug.cgi?id=258185</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="Bri Harris">bharris9</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>eric.carlson</cc>
    
    <cc>jer.noble</cc>
    
    <cc>simon.fraser</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>1961646</commentid>
    <comment_count>0</comment_count>
    <who name="Bri Harris">bharris9</who>
    <bug_when>2023-06-14 14:34:54 -0700</bug_when>
    <thetext>The following 2 layout tests:

media/track/track-user-stylesheet.html 
media/track/track-webvtt-snap-to-lines-inline-style.html

are a flaky crash on iOS 16 and macOS Debug queues. 


HISTORY:

https://results.webkit.org/?suite=layout-tests&amp;suite=layout-tests&amp;suite=layout-tests&amp;test=media%2Ftrack%2Fvideo-track-add-remove.html&amp;test=media%2Ftrack%2Ftrack-webvtt-snap-to-lines-inline-style.html&amp;test=media%2Ftrack%2Ftrack-user-stylesheet.html</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1961648</commentid>
    <comment_count>1</comment_count>
    <who name="Bri Harris">bharris9</who>
    <bug_when>2023-06-14 14:35:14 -0700</bug_when>
    <thetext>STDERR TEXT:

ASSERTION FAILED: firstChild()
/Volumes/Data/worker/Apple-Ventura-Debug-Build/build/Source/WebCore/rendering/RenderVTTCue.cpp(79) : bool WebCore::RenderVTTCue::initializeLayoutParameters(WebCore::LayoutUnit &amp;, WebCore::LayoutUnit &amp;)
1   0x151bf4550 WTFCrash
2   0x107f790f0 WebCore::NetworkResourcesData::ResourceData::hasContent() const
3   0x10915a110 WebCore::RenderVTTCue::initializeLayoutParameters(WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
4   0x109159cbc WebCore::RenderVTTCue::repositionCueSnapToLinesSet()
5   0x109159c44 WebCore::RenderVTTCue::layout()
6   0x1081e0af0 WebCore::RenderElement::layoutIfNeeded()
7   0x108f08a5c WebCore::RenderBlock::layoutPositionedObject(WebCore::RenderBox&amp;, bool, bool)
8   0x108f075cc WebCore::RenderBlock::layoutPositionedObjects(bool, bool)
9   0x108f07150 WebCore::RenderBlock::simplifiedLayout()
10  0x108f21868 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
11  0x108f05788 WebCore::RenderBlock::layout()
12  0x1081e0af0 WebCore::RenderElement::layoutIfNeeded()
13  0x108f08a5c WebCore::RenderBlock::layoutPositionedObject(WebCore::RenderBox&amp;, bool, bool)
14  0x108f075cc WebCore::RenderBlock::layoutPositionedObjects(bool, bool)
15  0x108f21f3c WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
16  0x108f05788 WebCore::RenderBlock::layout()
17  0x109015dc8 WebCore::RenderImage::layoutShadowContent(WebCore::LayoutSize const&amp;)
18  0x1090159a8 WebCore::RenderImage::layout()
19  0x1090beb30 WebCore::RenderMedia::layout()
20  0x10915c294 WebCore::RenderVideo::layout()
21  0x1081e0af0 WebCore::RenderElement::layoutIfNeeded()
22  0x108f26958 WebCore::RenderBlockFlow::layoutModernLines(bool, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
23  0x108f24350 WebCore::RenderBlockFlow::layoutInlineChildren(bool, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
24  0x108f22898 WebCore::RenderBlockFlow::layoutInFlowChildren(bool, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
25  0x108f21a90 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
26  0x108f05788 WebCore::RenderBlock::layout()
27  0x108f25470 WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&amp;, WebCore::RenderBlockFlow::MarginInfo&amp;, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
28  0x108f246b0 WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&amp;)
29  0x108f228d4 WebCore::RenderBlockFlow::layoutInFlowChildren(bool, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
30  0x108f21a90 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
31  0x108f05788 WebCore::RenderBlock::layout()
com.apple.WebKit.WebContent.Development terminated (pid 34111) for reason: crash
LEAK: 1 WebPageProxy</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1961649</commentid>
    <comment_count>2</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2023-06-14 14:35:41 -0700</bug_when>
    <thetext>&lt;rdar://problem/110799490&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1961666</commentid>
    <comment_count>3</comment_count>
    <who name="EWS">ews-feeder</who>
    <bug_when>2023-06-14 16:28:48 -0700</bug_when>
    <thetext>Test gardening commit 265170@main (c727258b818a): &lt;https://commits.webkit.org/265170@main&gt;

Reviewed commits have been landed. Closing PR #14975 and removing active labels.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>