stylesheet: parse nested rules starting with an identifier#193
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CSS Nesting 1 lets a nested rule begin with an identifier, so a prelude like h2:where(...) parses as a declaration until the block shows up. The declaration parser raised instead of returning None, so recovery dropped the rule: cascade saw 2 of typography.css's 47 blocks.
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A nested rule whose selector starts with an identifier, such as
h2:where(:not(.x)) { ... }, was dropped with a "curly block in declaration value" warning: CSS Nesting 1 makes that prelude ambiguous with a declaration until the block appears, and the declaration parser raised rather than letting the existing nested-rule fallback run. Parsing now rewinds and retries as a rule when a block follows, so a declaration that is merely invalid still reports as one.Found against the Tailwind typography stylesheet, where cascade parsed 2 of its 47 blocks.