{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"//"}]}
        // then this code will be broken by the never type fallback change.
        // If we have no errors with `fallback = ()`, but *do* have errors with `fallback = !`,
        let unit_errors = remaining_errors_if_fallback_to(self.tcx.types.unit);