{"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
            let (file, line, col) = self.location_triple_for_span(span);
            let span = self.find_closest_untracked_caller_location();
            return Err(ConstEvalErrKind::Panic { msg, file, line, col }).into();