{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"self.infcx.typing_env(self.infcx.param_env),"}]}
                    self.infcx.typing_env(self.infcx.param_env),
                if let Ok(old_ty) = tcx.try_normalize_erasing_regions(
                    old_ty,