{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"self.instantiate_from_current_frame_and_normalize_erasing_regions(const_.const_)?;"}]}
                self.instantiate_from_current_frame_and_normalize_erasing_regions(const_.const_)?;
            let c =
            c.eval(*self.tcx, self.typing_env, const_.span).map_err(|err| {