[Webkit-unassigned] [Bug 223144] New: [ macOS debug arm64 ] ASSERTION FAILED: count >= 1 ./rendering/RenderMultiColumnSet.cpp(450) : unsigned int WebCore::RenderMultiColumnSet::columnCount() const

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=223144

            Bug ID: 223144
           Summary: [ macOS debug arm64 ] ASSERTION FAILED: count >= 1
                    ./rendering/RenderMultiColumnSet.cpp(450) : unsigned
                    int WebCore::RenderMultiColumnSet::columnCount() const
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Jenner at apple.com

fast/multicol/crash-when-spanner-candidate-is-out-of-flow.html

is crashing/an Assertion Failure in macOS Debug on Apple Silicon only.

HISTORY URL:
https://results.webkit.org/?suite=layout-tests&test=fast%2Fmulticol%2Fcrash-when-spanner-candidate-is-out-of-flow.html

CRASHLOG TEXT:
ASSERTION FAILED: count >= 1
./rendering/RenderMultiColumnSet.cpp(450) : unsigned int WebCore::RenderMultiColumnSet::columnCount() const
1   0x135b34bcc WTFCrash
2   0x114ae0da0 WebCore::JSRTCRtpReceiver::createPrototype(JSC::VM&, WebCore::JSDOMGlobalObject&)
3   0x1183b1a3c WebCore::RenderMultiColumnSet::columnCount() const
4   0x1183b3ff8 WebCore::RenderMultiColumnSet::addOverflowFromChildren()
5   0x1181b12e4 WebCore::RenderBlock::computeOverflow(WebCore::LayoutUnit, bool)
6   0x1181d2038 WebCore::RenderBlockFlow::computeOverflow(WebCore::LayoutUnit, bool)
7   0x1181c796c WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
8   0x1181b0dfc WebCore::RenderBlock::layout()
9   0x1183b2254 WebCore::RenderMultiColumnSet::layout()
10  0x1181c98b8 WebCore::RenderBlockFlow::layoutBlockChild(WebCore::RenderBox&, WebCore::RenderBlockFlow::MarginInfo&, WebCore::LayoutUnit&, WebCore::LayoutUnit&)
11  0x1181c82f8 WebCore::RenderBlockFlow::layoutBlockChildren(bool, WebCore::LayoutUnit&)
12  0x1181c7588 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
13  0x1181c8490 WebCore::RenderBlockFlow::relayoutForPagination()
14  0x1181c767c WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
15  0x1181b0dfc WebCore::RenderBlock::layout()
16  0x1180fbfdc WebCore::RenderElement::layoutIfNeeded()
17  0x1181b37bc WebCore::RenderBlock::layoutPositionedObject(WebCore::RenderBox&, bool, bool)
18  0x1181b304c WebCore::RenderBlock::layoutPositionedObjects(bool, bool)
19  0x1181c7938 WebCore::RenderBlockFlow::layoutBlock(bool, WebCore::LayoutUnit)
20  0x1181b0dfc WebCore::RenderBlock::layout()
21  0x11846b094 WebCore::RenderView::layout()
22  0x11781e0e0 WebCore::FrameViewLayoutContext::layout()
23  0x1168c68ac WebCore::Document::implicitClose()
24  0x1175ddadc WebCore::FrameLoader::checkCallImplicitClose()
25  0x1175dd5b4 WebCore::FrameLoader::checkCompleted()
26  0x1175db7dc WebCore::FrameLoader::finishedParsing()
27  0x1168d9b10 WebCore::Document::finishedParsing()
28  0x1170fa1dc WebCore::HTMLConstructionSite::finishedParsing()
29  0x117141d5c WebCore::HTMLTreeBuilder::finished()
30  0x117101644 WebCore::HTMLDocumentParser::end()
31  0x1170ff4fc WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd()
LEAK: 1 WebPageProxy

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