RESOLVED FIXED Bug 233008
REGRESSION (r285618): [mac-wk1] ASSERTION FAILED: cgContext == [currentContext CGContext] 
https://bugs.webkit.org/show_bug.cgi?id=233008
Summary REGRESSION (r285618): [mac-wk1] ASSERTION FAILED: cgContext == [currentContex...
Ryan Haddad
Reported 2021-11-11 13:00:46 PST
http/tests/css/filters-on-iframes-transform.html is asserting on macOS Debug WK1 bots: ASSERTION FAILED: cgContext == [currentContext CGContext] ./platform/mac/WidgetMac.mm(242) : virtual void WebCore::Widget::paint(WebCore::GraphicsContext &, const WebCore::IntRect &, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext *) 1 0x11e2d81a9 WTFCrash 2 0x12d35abbb WTFCrashWithInfo(int, char const*, char const*, int) 3 0x12f6fbc25 WebCore::Widget::paint(WebCore::GraphicsContext&, WebCore::IntRect const&, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext*) 4 0x1317e9f33 WebCore::ScrollView::paint(WebCore::GraphicsContext&, WebCore::IntRect const&, WebCore::Widget::SecurityOriginPaintPolicy, WebCore::EventRegionContext*) 5 0x13226f8c8 WebCore::RenderWidget::paintContents(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 6 0x13227016b WebCore::RenderWidget::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 7 0x132096319 WebCore::paintPhase(WebCore::RenderElement&, WebCore::PaintPhase, WebCore::PaintInfo&, WebCore::LayoutPoint const&) 8 0x1320962a8 WebCore::RenderElement::paintAsInlineBlock(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 9 0x131230b8c WebCore::LayoutIntegration::LineLayout::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 10 0x131ffd9d4 WebCore::RenderBlockFlow::paintInlineChildren(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 11 0x131fd4982 WebCore::RenderBlock::paintContents(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 12 0x131fd5d74 WebCore::RenderBlock::paintObject(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 13 0x131fd429b WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) 14 0x132117c04 WebCore::RenderLayer::paintForegroundForFragmentsWithPhase(WebCore::PaintPhase, WTF::Vector<WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::RenderObject*) 15 0x13211589f WebCore::RenderLayer::paintForegroundForFragments(WTF::Vector<WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&, WebCore::GraphicsContext&, WebCore::GraphicsContext&, WebCore::LayoutRect const&, bool, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::PaintBehavior>, WebCore::RenderObject*) 16 0x132111129 WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 17 0x132110621 WebCore::RenderLayer::paintLayerContentsAndReflection(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 18 0x1321103fe WebCore::RenderLayer::paintLayerByApplyingTransform(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>, WebCore::LayoutSize const&) 19 0x13210f51a WebCore::RenderLayer::paintLayerWithEffects(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 20 0x13210e8b7 WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 21 0x13211526e WebCore::RenderLayer::paintList(WebCore::RenderLayer::LayerList, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 22 0x13211124f WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 23 0x132110621 WebCore::RenderLayer::paintLayerContentsAndReflection(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 24 0x13210f55d WebCore::RenderLayer::paintLayerWithEffects(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 25 0x13210e8b7 WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 26 0x13211526e WebCore::RenderLayer::paintList(WebCore::RenderLayer::LayerList, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 27 0x13211124f WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 28 0x132110621 WebCore::RenderLayer::paintLayerContentsAndReflection(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 29 0x13210f55d WebCore::RenderLayer::paintLayerWithEffects(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 30 0x13210e8b7 WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) 31 0x13211526e WebCore::RenderLayer::paintList(WebCore::RenderLayer::LayerList, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, WTF::OptionSet<WebCore::RenderLayer::PaintLayerFlag>) https://results.webkit.org/?suite=layout-tests&test=http/tests/css/filters-on-iframes-transform.html
Attachments
Patch (4.66 KB, patch)
2021-11-12 20:24 PST, Said Abou-Hallawa 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2021-11-11 13:01:02 PST
<rdar://problem/85311948>
Ryan Haddad
Comment 2 2021-11-11 13:02:51 PST
Test history clearly suggests https://trac.webkit.org/changeset/285618/webkit is what caused this regression
Ryan Haddad
Comment 3 2021-11-11 13:53:00 PST
Skipped test in r285656 since Said is working on the fix now.
Darin Adler
Comment 4 2021-11-12 16:54:44 PST
Unbalanced save/restore?
Said Abou-Hallawa
Comment 5 2021-11-12 20:24:36 PST
Created attachment 444131 [details] Patch
Said Abou-Hallawa
Comment 6 2021-11-12 20:29:29 PST
(In reply to Darin Adler from comment #4) > Unbalanced save/restore? Yes kind of. We switch the context of PaintInto to the context of the filter ImageBuffer and we do not restore back.
EWS
Comment 7 2021-11-13 16:19:33 PST
Committed r285785 (244229@main): <https://commits.webkit.org/244229@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 444131 [details].
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