<?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>258184</bug_id>
          
          <creation_ts>2023-06-15 20:16:58 -0700</creation_ts>
          <short_desc>ASSERTION FAILED: firstChild():[ macOS ] 3x media/track/ tests are flaky crashes.</short_desc>
          <delta_ts>2023-06-18 11:24:04 -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=258096</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>webkit-bot-watchers-bugzilla</cc>
    
    <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1962001</commentid>
    <comment_count>0</comment_count>
    <who name="Bri Harris">bharris9</who>
    <bug_when>2023-06-15 20:16:58 -0700</bug_when>
    <thetext>The following 2 layout tests:

media/track/track-webvtt-no-snap-to-lines-overlap.html
media/track/track-webvtt-snap-to-lines-left-right.html

are flaky crashes on macOS Debug queues.

HISTORY:

https://results.webkit.org/?suite=layout-tests&amp;suite=layout-tests&amp;test=media%2Ftrack%2Ftrack-webvtt-no-snap-to-lines-overlap.html&amp;test=media%2Ftrack%2Ftrack-webvtt-snap-to-lines-left-right.html

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   0x151cd6060 WTFCrash
2   0x107fd9fe0 WebCore::NetworkResourcesData::ResourceData::hasContent() const
3   0x1091c1bfc WebCore::RenderVTTCue::initializeLayoutParameters(WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
4   0x1091c17a8 WebCore::RenderVTTCue::repositionCueSnapToLinesSet()
5   0x1091c1730 WebCore::RenderVTTCue::layout()
6   0x108241714 WebCore::RenderElement::layoutIfNeeded()
7   0x108f70438 WebCore::RenderBlock::layoutPositionedObject(WebCore::RenderBox&amp;, bool, bool)
8   0x108f6efa8 WebCore::RenderBlock::layoutPositionedObjects(bool, bool)
9   0x108f6eb2c WebCore::RenderBlock::simplifiedLayout()
10  0x108f89288 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
11  0x108f6d164 WebCore::RenderBlock::layout()
12  0x108241714 WebCore::RenderElement::layoutIfNeeded()
13  0x108f70438 WebCore::RenderBlock::layoutPositionedObject(WebCore::RenderBox&amp;, bool, bool)
14  0x108f6efa8 WebCore::RenderBlock::layoutPositionedObjects(bool, bool)
15  0x108f8995c WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
16  0x108f6d164 WebCore::RenderBlock::layout()
17  0x10907d870 WebCore::RenderImage::layoutShadowContent(WebCore::LayoutSize const&amp;)
18  0x10907d450 WebCore::RenderImage::layout()
19  0x1091265d8 WebCore::RenderMedia::layout()
20  0x1091c3d80 WebCore::RenderVideo::layout()
21  0x108241714 WebCore::RenderElement::layoutIfNeeded()
22  0x108f8e378 WebCore::RenderBlockFlow::layoutModernLines(bool, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
23  0x108f8bd70 WebCore::RenderBlockFlow::layoutInlineChildren(bool, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
24  0x108f8a2b8 WebCore::RenderBlockFlow::layoutInFlowChildren(bool, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
25  0x108f894b0 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
26  0x108f6d164 WebCore::RenderBlock::layout()
27  0x108f8ce90 WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&amp;, WebCore::RenderBlockFlow::MarginInfo&amp;, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
28  0x108f8c0d0 WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&amp;)
29  0x108f8a2f4 WebCore::RenderBlockFlow::layoutInFlowChildren(bool, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;, WebCore::LayoutUnit&amp;)
30  0x108f894b0 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
31  0x108f6d164 WebCore::RenderBlock::layout()
com.apple.WebKit.WebContent.Development terminated (pid 46474) for reason: crash
LEAK: 1 WebPageProxy</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1962002</commentid>
    <comment_count>1</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2023-06-15 20:17:15 -0700</bug_when>
    <thetext>&lt;rdar://problem/110876644&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1962005</commentid>
    <comment_count>2</comment_count>
    <who name="EWS">ews-feeder</who>
    <bug_when>2023-06-15 20:43:44 -0700</bug_when>
    <thetext>Test gardening commit 265224@main (a29a6e3119c5): &lt;https://commits.webkit.org/265224@main&gt;

Reviewed commits have been landed. Closing PR #15036 and removing active labels.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>