never_patterns: typecheck never patterns This checks that a `!` pattern is only used on an uninhabited type (modulo match ergonomics, i.e. `!` is allowed on `&Void`). r? `@compiler-errors`
never_patterns: typecheck never patterns This checks that a `!` pattern is only used on an uninhabited type (modulo match ergonomics, i.e. `!` is allowed on `&Void`). r? `@compiler-errors`