{"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":".map_err(|err|"}]}
                .map_err(|err| {
            tcx.fn_abi_of_instance(self.typing_env().as_query_input((instance, extra_args)))
                    // HACK(eddyb) at least for definitions of/calls to `Instance`s,