haikuwebkit/LayoutTests/fast/multicol/spanner-get-re-added-on-mov...

PASS if no crash in release.
[Multicolumn] Do not try to re-validate a multicol spanner when the renderer is moved internally https://bugs.webkit.org/show_bug.cgi?id=223836 <rdar://75742694> Reviewed by Ryosuke Niwa. Source/WebCore: When a renderer becomes a multicol spanner 1. it is moved out of its original tree position and placed as a sibling of the enclosing multicolumn flow and 2. a spanner placeholder is constructed and inserted at the original position This patch fixes the case when an already placed multicol spanner is internally moved (e.g. collapsing an anonymous block parent) and we attempt to re-insert this spanner to the multicolumn flow. No spanner state should change due to internal re-parenting. Test: fast/multicol/spanner-get-re-added-on-move-crash.html * rendering/updating/RenderTreeBuilder.cpp: (WebCore::RenderTreeBuilder::attachToRenderElementInternal): LayoutTests: * TestExpectations: * fast/multicol/spanner-get-re-added-on-move-crash-expected.txt: Added. * fast/multicol/spanner-get-re-added-on-move-crash.html: Added. Canonical link: https://commits.webkit.org/235838@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@275133 268f45cc-cd09-0410-ab3c-d52691b4dbfc 2021-03-27 13:51:18 +00:00			`PASS if no crash in release.`