Tim Ledbetter 30d528d3c0 LibWeb: Skip shorthand serialization for var() longhands ...

When CSSRule.cssText is accessed, shorthands are recomposed from
individual longhand declarations. For coordinating-list shorthands, the
`serialize()` function always assumed that each  sub-property was a
value list. This caused a  crash for longhands containing `var()`. We
now fall back to serializing properties individually if any sub
property contains `var()`. This matches the behavior of other engines.

2026-03-06 13:43:33 +01:00

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