RESOLVED CONFIGURATION CHANGED 244714
REGRESSION (253726@main): [ macOS wk1 Debug ] ASSERTION FAILED: !needsLayout() WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext*) 
https://bugs.webkit.org/show_bug.cgi?id=244714
Summary REGRESSION (253726@main): [ macOS wk1 Debug ] ASSERTION FAILED: !needsLayout(...
Karl Rackler
Reported 2022-09-02 08:18:34 PDT
Description: imported/w3c/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-video.html is a flaky crash The test consistently passed until the first flaky crash a saw on the dashboard at 246850@main. The test continues to flaky crash until, at 253726@main, the frequency of flaky crashes increases significantly. REPRODUCTION STEPS I can reproduce the flaky crash at 253726@main but cannot reproduce it at 253725@main or earlier. Command: run-webkit-tests --debug -1 --exit-after-n-crashes-or-timeouts 1 --iterations 50 --child-processes 1 --test-list <test-list attached> Result: Unexpected flakiness: crashes (1) imported/w3c/web-platform-tests/html/browsers/browsing-the-web/read-media/pageload-video.html [ Pass Crash ] History: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fbrowsers%2Fbrowsing-the-web%2Fread-media%2Fpageload-video.html&platform=mac&style=debug&flavor=wk1&limit=50000&recent=false Crash Log: Thread 0 Crashed:: 0 com.apple.JavaScriptCore 0x121b68f4e WTFCrash 1 com.apple.WebCore 0x13153839a WTFCrashWithInfo(int, char const*, char const*, int) 2 com.apple.WebCore 0x135d7094e WebCore::FrameView::paintContents(WebCore::GraphicsContext&, WebCore::IntRect const&, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext*) 3 com.apple.WebKitLegacy 0x1075c8a1c -[WebFrame(WebInternal) _drawRect:contentsOnly:] 4 com.apple.WebKitLegacy 0x1075ec9d2 -[WebHTMLView drawSingleRect:] 5 com.apple.WebKitLegacy 0x1075ed034 -[WebHTMLView drawRect:] 6 com.apple.AppKit 0x7ff80bec3280 _NSViewDrawRect + 120 (/AppleInternal/Library/BuildRoots/dd001be1-8f4d-11ec-b343-4a23b0182bfd/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit.subproj/NSView.m:992) 7 com.apple.AppKit 0x7ff80c5de3bc -[NSView _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] + 1826 (/AppleInternal/Library/BuildRoots/dd001be1-8f4d-11ec-b343-4a23b0182bfd/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit.subproj/NSView.m:16555) 8 com.apple.WebKitLegacy 0x1075e07c6 -[WebHTMLView(WebPrivate) _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] 9 com.apple.AppKit 0x7ff80c5de70a -[NSView _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] + 2672 (/AppleInternal/Library/BuildRoots/dd001be1-8f4d-11ec-b343-4a23b0182bfd/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit.subproj/NSView.m:16588) 10 com.apple.AppKit 0x7ff80c5de70a -[NSView _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] + 2672 (/AppleInternal/Library/BuildRoots/dd001be1-8f4d-11ec-b343-4a23b0182bfd/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit.subproj/NSView.m:16588) 11 com.apple.AppKit 0x7ff80c5de70a -[NSView _recursive:displayRectIgnoringOpacity:inContext:stopAtLayerBackedViews:] + 2672 (/AppleInternal/Library/BuildRoots/dd001be1-8f4d-11ec-b343-4a23b0182bfd/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit.subproj/NSView.m:16588) 12 com.apple.AppKit 0x7ff80c033194 -[NSView displayRectIgnoringOpacity:inContext:] + 824 (/AppleInternal/Library/BuildRoots/dd001be1-8f4d-11ec-b343-4a23b0182bfd/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit.subproj/NSView.m:10319) 13 com.apple.WebCore 0x133c3951c WebCore::Widget::paint(WebCore::GraphicsContext&, WebCore::IntRect const&, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext*) 14 com.apple.WebCore 0x13602c482 WebCore::ScrollView::paint(WebCore::GraphicsContext&, WebCore::IntRect const&, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext*) 15 com.apple.WebCore 0x136b5a108 WebCore::RenderWidget::paintContents(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 16 com.apple.WebCore 0x136b5a9c2 WebCore::RenderWidget::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&)
Attachments
test-list (240 bytes, text/plain)
2022-09-02 08:22 PDT, Karl Rackler 		no flags
Details
symbolicated-log (82.88 KB, text/plain)
2022-09-02 08:22 PDT, Karl Rackler 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2022-09-02 08:18:54 PDT
<rdar://problem/99489783>
Karl Rackler
Comment 2 2022-09-02 08:22:15 PDT
Created attachment 462096 [details] test-list
Karl Rackler
Comment 3 2022-09-02 08:22:44 PDT
Created attachment 462097 [details] symbolicated-log
Karl Rackler
Comment 4 2022-09-02 08:23:27 PDT
I have marked this test as a flaky crash while this issue is investigated.
EWS
Comment 5 2022-09-02 08:30:18 PDT
Test gardening commit 254101@main (ae96f908e4ef): <https://commits.webkit.org/254101@main> Reviewed commits have been landed. Closing PR #3957 and removing active labels.
Karl Rackler
Comment 6 2022-09-07 05:56:10 PDT
Skipping test affected by wk1 debug only assertion caused by underlying issue. https://github.com/WebKit/WebKit/pull/4093
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