[Webkit-unassigned] [Bug 196123] New: With async scrolling enabled, this MathML test asserts

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Mar 21 18:04:16 PDT 2019


https://bugs.webkit.org/show_bug.cgi?id=196123

            Bug ID: 196123
           Summary: With async scrolling enabled, this MathML test asserts
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: MathML
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

Created attachment 365660

  --> https://bugs.webkit.org/attachment.cgi?id=365660&action=review

Testcase

Test triggers an assertion which only happens with an "mn" element when overflow: -webkit-paged-y is applied:

ASSERTION FAILED: !m_scrollDimensionsDirty
./rendering/RenderLayer.cpp(3439) : bool WebCore::RenderLayer::hasHorizontalOverflow() const
1   0x13cb83fc9 WTFCrash
2   0x1411f497b WTFCrashWithInfo(int, char const*, char const*, int)
3   0x144524d53 WebCore::RenderLayer::hasHorizontalOverflow() const
4   0x14451d6a9 WebCore::RenderLayer::hasScrollableHorizontalOverflow() const
5   0x14451d656 WebCore::RenderLayer::hasCompositedScrollableOverflow() const
6   0x144558e0f WebCore::RenderLayerCompositor::requiresCompositingForOverflowScrolling(WebCore::RenderLayer const&, WebCore::RenderLayerCompositor::RequiresCompositingData&) const
7   0x1445533f2 WebCore::RenderLayerCompositor::requiresCompositingLayer(WebCore::RenderLayer const&, WebCore::RenderLayerCompositor::RequiresCompositingData&) const
8   0x1445526ba WebCore::RenderLayerCompositor::needsToBeComposited(WebCore::RenderLayer const&, WebCore::RenderLayerCompositor::RequiresCompositingData&) const
9   0x144550440 WebCore::RenderLayerCompositor::computeCompositingRequirements(WebCore::RenderLayer*, WebCore::RenderLayer&, WebCore::RenderLayerCompositor::OverlapMap&, WebCore::RenderLayerCompositor::CompositingState&, bool&)
10  0x144550835 WebCore::RenderLayerCompositor::computeCompositingRequirements(WebCore::RenderLayer*, WebCore::RenderLayer&, WebCore::RenderLayerCompositor::OverlapMap&, WebCore::RenderLayerCompositor::CompositingState&, bool&)
11  0x1445508db WebCore::RenderLayerCompositor::computeCompositingRequirements(WebCore::RenderLayer*, WebCore::RenderLayer&, WebCore::RenderLayerCompositor::OverlapMap&, WebCore::RenderLayerCompositor::CompositingState&, bool&)
12  0x144520bc7 WebCore::RenderLayerCompositor::updateCompositingLayers(WebCore::CompositingUpdateType, WebCore::RenderLayer*)
13  0x143d4a6d3 WebCore::FrameView::updateCompositingLayersAfterLayout()
14  0x143d4ce07 WebCore::FrameView::didLayout(WTF::WeakPtr<WebCore::RenderElement>)
15  0x143d86cb0 WebCore::FrameViewLayoutContext::layout()
16  0x143297094 WebCore::Document::implicitClose()
17  0x143b78ccb WebCore::FrameLoader::checkCallImplicitClose()
18  0x143b787a8 WebCore::FrameLoader::checkCompleted()
19  0x143b76b65 WebCore::FrameLoader::finishedParsing()
20  0x1432af60c WebCore::Document::finishedParsing()
21  0x1438513d8 WebCore::HTMLConstructionSite::finishedParsing()
22  0x143896285 WebCore::HTMLTreeBuilder::finished()
23  0x143858728 WebCore::HTMLDocumentParser::end()
24  0x143856668 WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd()
25  0x143856384 WebCore::HTMLDocumentParser::prepareToStopParsing()
26  0x14385878f WebCore::HTMLDocumentParser::attemptToEnd()
27  0x143858864 WebCore::HTMLDocumentParser::finish()
28  0x143b24eba WebCore::DocumentWriter::end()
29  0x143b23ddf WebCore::DocumentLoader::finishedLoading()
30  0x143b23a1d WebCore::DocumentLoader::notifyFinished(WebCore::CachedResource&)
31  0x143c6e78f WebCore::CachedResource::checkNotify()

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