Bug 208278

The following tests started to have assertion failures after commit r257507:

fast/layoutformattingcontext/block-only/floating-and-next-previous-inflow-with-margin-with-no-border.html	
fast/layoutformattingcontext/block-only/floating-with-new-block-formatting-context.html
fast/layoutformattingcontext/block-only/floats-and-block-formatting-roots.html
fast/layoutformattingcontext/block-only/margin-collapse-first-last-are-floating.html

These failures are happening on Catalina and Mojave debug 

History:

https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=fast%2Flayoutformattingcontext%2Fblock-only%2Ffloating-and-next-previous-inflow-with-margin-with-no-border.html&test=fast%2Flayoutformattingcontext%2Fblock-only%2Ffloating-with-new-block-formatting-context.html&test=fast%2Flayoutformattingcontext%2Fblock-only%2Ffloats-and-block-formatting-roots.html&test=fast%2Flayoutformattingcontext%2Fblock-only%2Fmargin-collapse-first-last-are-floating.html

Failure:

stderr:
ASSERTION FAILED: blockFormattingState.hasPositiveAndNegativeVerticalMargin(layoutBox)
./layout/blockformatting/BlockMarginCollapse.cpp(513) : PositiveAndNegativeVerticalMargin::Values WebCore::Layout::BlockFormattingContext::MarginCollapse::positiveNegativeValues(const WebCore::Layout::Box &, WebCore::Layout::BlockFormattingContext::MarginCollapse::MarginType) const
1   0x520f50de9 WTFCrash
2   0x5044bacfb WTFCrashWithInfo(int, char const*, char const*, int)
3   0x5077b3d2d WebCore::Layout::BlockFormattingContext::MarginCollapse::positiveNegativeValues(WebCore::Layout::Box const&, WebCore::Layout::BlockFormattingContext::MarginCollapse::MarginType) const
4   0x5077b40e7 WebCore::Layout::BlockFormattingContext::MarginCollapse::positiveNegativeMarginBefore(WebCore::Layout::Box const&, WebCore::Layout::UsedVerticalMargin::NonCollapsedValues) const::$_14::operator()() const
5   0x5077b3e6b WebCore::Layout::BlockFormattingContext::MarginCollapse::positiveNegativeMarginBefore(WebCore::Layout::Box const&, WebCore::Layout::UsedVerticalMargin::NonCollapsedValues) const
6   0x5077b4656 WebCore::Layout::BlockFormattingContext::MarginCollapse::precomputedPositiveNegativeValues(WebCore::Layout::Box const&, WebCore::Layout::BlockFormattingContext::MarginCollapse::MarginType) const
7   0x5077b4987 WebCore::Layout::BlockFormattingContext::MarginCollapse::precomputedPositiveNegativeMarginBefore(WebCore::Layout::Box const&, WebCore::Layout::UsedVerticalMargin::NonCollapsedValues) const::$_17::operator()() const
8   0x5077b46eb WebCore::Layout::BlockFormattingContext::MarginCollapse::precomputedPositiveNegativeMarginBefore(WebCore::Layout::Box const&, WebCore::Layout::UsedVerticalMargin::NonCollapsedValues) const
9   0x5077acf3c WebCore::Layout::BlockFormattingContext::MarginCollapse::precomputedMarginBefore(WebCore::Layout::Box const&, WebCore::Layout::UsedVerticalMargin::NonCollapsedValues)
10  0x5077ac78c WebCore::Layout::BlockFormattingContext::precomputeVerticalPosition(WebCore::Layout::Box const&, WebCore::Layout::HorizontalConstraints const&, WebCore::Layout::VerticalConstraints const&)
11  0x5077ac6b7 WebCore::Layout::BlockFormattingContext::precomputeVerticalPositionForAncestors(WebCore::Layout::Box const&, WebCore::Layout::BlockFormattingContext::ConstraintsPair<WebCore::Layout::HorizontalConstraints> const&, WebCore::Layout::BlockFormattingContext::ConstraintsPair<WebCore::Layout::VerticalConstraints> const&)
12  0x5077abe7b WebCore::Layout::BlockFormattingContext::computePositionToAvoidFloats(WebCore::Layout::FloatingContext const&, WebCore::Layout::Box const&, WebCore::Layout::BlockFormattingContext::ConstraintsPair<WebCore::Layout::HorizontalConstraints> const&, WebCore::Layout::BlockFormattingContext::ConstraintsPair<WebCore::Layout::VerticalConstraints> const&)
13  0x5077aa965 WebCore::Layout::BlockFormattingContext::layoutInFlowContent(WebCore::Layout::InvalidationState&, WebCore::Layout::HorizontalConstraints const&, WebCore::Layout::VerticalConstraints const&)
14  0x50778f09e WebCore::Layout::LayoutContext::layoutFormattingContextSubtree(WebCore::Layout::ContainerBox const&, WebCore::Layout::InvalidationState&)
15  0x50778ed57 WebCore::Layout::LayoutContext::layoutWithPreparedRootGeometry(WebCore::Layout::InvalidationState&)
16  0x50778ebe3 WebCore::Layout::LayoutContext::layout(WebCore::LayoutSize const&, WebCore::Layout::InvalidationState&)
17  0x507b17c13 WebCore::FrameViewLayoutContext::layoutUsingFormattingContext()
18  0x507b18feb WebCore::FrameViewLayoutContext::layout()
19  0x506d0b613 WebCore::Document::implicitClose()
20  0x5078b705b WebCore::FrameLoader::checkCallImplicitClose()
21  0x5078b6b3a WebCore::FrameLoader::checkCompleted()
22  0x5078b4dd5 WebCore::FrameLoader::finishedParsing()
23  0x506d1e340 WebCore::Document::finishedParsing()
24  0x50749a1b8 WebCore::HTMLConstructionSite::finishedParsing()
25  0x5074e2475 WebCore::HTMLTreeBuilder::finished()
26  0x5074a13d8 WebCore::HTMLDocumentParser::end()
27  0x50749f358 WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd()
28  0x50749f074 WebCore::HTMLDocumentParser::prepareToStopParsing()
29  0x5074a143f WebCore::HTMLDocumentParser::attemptToEnd()
30  0x5074a1514 WebCore::HTMLDocumentParser::finish()
31  0x507851f9a WebCore::DocumentWriter::end()
LEAK: 1 WebPageProxy