Bug 258096

Summary:	ASSERTION FAILED: firstChild(): [ iOS, macOS Debug ] 2x media/track tests are a flaky crash.
Product:	WebKit	Reporter:	Bri Harris <bharris9>
Component:	New Bugs	Assignee:	Nobody <webkit-unassigned>
Status:	NEW
Severity:	Normal	CC:	eric.carlson, jer.noble, simon.fraser, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Other
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://bugs.webkit.org/show_bug.cgi?id=258097 https://bugs.webkit.org/show_bug.cgi?id=258183 https://bugs.webkit.org/show_bug.cgi?id=258184 https://bugs.webkit.org/show_bug.cgi?id=258185

Bri Harris

Reported 2023-06-14 14:34:54 PDT

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&suite=layout-tests&suite=layout-tests&test=media%2Ftrack%2Fvideo-track-add-remove.html&test=media%2Ftrack%2Ftrack-webvtt-snap-to-lines-inline-style.html&test=media%2Ftrack%2Ftrack-user-stylesheet.html

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Bri Harris

Comment 1 2023-06-14 14:35:14 PDT

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 &, WebCore::LayoutUnit &) 1 0x151bf4550 WTFCrash 2 0x107f790f0 WebCore::NetworkResourcesData::ResourceData::hasContent() const 3 0x10915a110 WebCore::RenderVTTCue::initializeLayoutParameters(WebCore::LayoutUnit&, WebCore::LayoutUnit&) 4 0x109159cbc WebCore::RenderVTTCue::repositionCueSnapToLinesSet() 5 0x109159c44 WebCore::RenderVTTCue::layout() 6 0x1081e0af0 WebCore::RenderElement::layoutIfNeeded() 7 0x108f08a5c WebCore::RenderBlock::layoutPositionedObject(WebCore::RenderBox&, 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&, 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&) 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&, WebCore::LayoutUnit&) 23 0x108f24350 WebCore::RenderBlockFlow::layoutInlineChildren(bool, WebCore::LayoutUnit&, WebCore::LayoutUnit&) 24 0x108f22898 WebCore::RenderBlockFlow::layoutInFlowChildren(bool, WebCore::LayoutUnit&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) 25 0x108f21a90 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit) 26 0x108f05788 WebCore::RenderBlock::layout() 27 0x108f25470 WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) 28 0x108f246b0 WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&) 29 0x108f228d4 WebCore::RenderBlockFlow::layoutInFlowChildren(bool, WebCore::LayoutUnit&, WebCore::LayoutUnit&, WebCore::LayoutUnit&) 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

Radar WebKit Bug Importer

Comment 2 2023-06-14 14:35:41 PDT

<rdar://problem/110799490>

EWS

Comment 3 2023-06-14 16:28:48 PDT

Test gardening commit 265170@main (c727258b818a): <https://commits.webkit.org/265170@main> Reviewed commits have been landed. Closing PR #14975 and removing active labels.

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