{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"ty::ReErased"}]}
            ty::ReErased | ty::ReError(_) => match self.canonicalize_mode {
            // obligations if we encounter a `ReErased` on one side, for example.
                CanonicalizeMode::Input(_) => CanonicalVarKind::Region(ty::UniverseIndex::ROOT),