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When a CSS animation keyframe uses var() referencing a nonexistent or invalid custom property, variable substitution produces a guaranteed-invalid value. The animation keyframe processing code did not handle this case, allowing the value to reach compute_opacity() (and similar functions) which would hit VERIFY_NOT_REACHED(). Fix this by skipping guaranteed-invalid values in compute_keyframe_values, matching how the regular cascading code treats them. This fixes a crash on chess.com.
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2 lines
2 B
Plaintext
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