Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 500fd5004df14f04bfeb13a58634e5506073d910
      
https://github.com/WebKit/WebKit/commit/500fd5004df14f04bfeb13a58634e5506073d910
  Author: Matt Woodrow <mattwood...@apple.com>
  Date:   2024-04-29 (Mon, 29 Apr 2024)

  Changed paths:
    M LayoutTests/TestExpectations
    M Source/WebCore/rendering/updating/RenderTreeUpdaterViewTransition.cpp

  Log Message:
  -----------
  [view-transitions] css/css-view-transitions/content-with-clip.html fails due 
to duplicate pseudo renderers.
https://bugs.webkit.org/show_bug.cgi?id=273388
<rdar://127217265>

Reviewed by Tim Nguyen.

The root element is included in the old state, but not the new, and is the first
name in the namedElements map.

Each frame during updatePseudoElementTree, `buildPseudoElementGroup` is called
for the root, and nothing is created (as expected)..

currentGroup then gets moved to the previous sibling, which is nullptr, and then
is in a broken state for further iterations.

All other iterated names then create new renderers, without removing the
existing ones.

* LayoutTests/TestExpectations:
* Source/WebCore/rendering/updating/RenderTreeUpdaterViewTransition.cpp:
(WebCore::RenderTreeUpdater::ViewTransition::updatePseudoElementTree):

Canonical link: https://commits.webkit.org/278120@main



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