A bare `Nil` parses as a capture, so a nullable match silently treated it as the null branch. Both the compiler and the language server now reject it and point at `None` (nullable `T?`) or `Nil()` (builtin `Option[T]`). Exhaustiveness reports `None` as the missing nullable branch, and the builtin generic type names no longer trigger the unknown-name warning.
TermiNexus
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