RESOLVED FIXED308429
[threaded-animations] remote timeline may not get preserved in update where a new animation uses it 
https://bugs.webkit.org/show_bug.cgi?id=308429
Summary [threaded-animations] remote timeline may not get preserved in update where a...
Antoine Quint
Reported 2026-02-22 06:25:37 PST
If a previously-running accelerated animation is removed during an update and a new accelerated animation is created in that same update, depending on the sequence in which their target layer are updated, the timeline they share may not get preserved yielding a failed assertion under `RemoteLayerTreeNode::setAcceleratedEffectsAndBaseValues()`.
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Add attachment proposed patch, testcase, etc.
Antoine Quint
Comment 1 2026-02-22 06:26:04 PST
rdar://170365106
Antoine Quint
Comment 2 2026-02-22 06:57:06 PST
Pull request: https://github.com/WebKit/WebKit/pull/59207
EWS
Comment 3 2026-02-22 09:02:44 PST
Committed 308011@main (9fe876d63d4a): <https://commits.webkit.org/308011@main> Reviewed commits have been landed. Closing PR #59207 and removing active labels.
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