Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: f7a8a5c0476af3f6349707dad1fd026c80eaf763
      
https://github.com/WebKit/WebKit/commit/f7a8a5c0476af3f6349707dad1fd026c80eaf763
  Author: Devin Rousso <[email protected]>
  Date:   2026-06-06 (Sat, 06 Jun 2026)

  Changed paths:
    A LayoutTests/fast/dom/pseudo-element-hidePopover-then-crash-expected.txt
    A LayoutTests/fast/dom/pseudo-element-hidePopover-then-crash.html
    M Source/WebCore/style/AnchorPositionEvaluator.cpp

  Log Message:
  -----------
  [css-anchor-position-1] REGRESSION(311053@main): crash hiding a popover whose 
::after pseudo-element inherits position-anchor and position-area
https://bugs.webkit.org/show_bug.cgi?id=316441

Reviewed by Kiet Ho.

* Source/WebCore/style/AnchorPositionEvaluator.cpp:
(WebCore::Style::AnchorPositionEvaluator::makeAnchorPositionedForAnchorMap):
Just because the `Styleable` (i.e. `Element`) exists doesn't guarantee that a 
psuedo-element for it exists, so check that before trying to use it.

* LayoutTests/fast/dom/pseudo-element-hidePopover-then-crash.html: Added.
* LayoutTests/fast/dom/pseudo-element-hidePopover-then-crash-expected.txt: 
Added.

Canonical link: https://commits.webkit.org/314698@main



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