Josh Matthews f206571869 layout: Prevent DomRefCell::borrow from being used in layout code (#42976) ...

DomRefCell::borrow inside of layout code is risky because it leads to
memory races if the code is ever called from layout worker threads. This
can be caught via TSAN, but we can also catch it deterministically in CI
by using our existing thread state debug assertions correctly.

Testing: Existing WPT test coverage is sufficient.
Fixes: #42962

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Signed-off-by: Josh Matthews <josh@joshmatthews.net>

2026-03-04 06:44:39 +00:00

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