{"ast_node_type":"impl","tokens":[{"end":90,"kind":"keyword","start":0,"text":"bug!(\"build_future_drop_poll_shim"}]}
        bug!("build_future_drop_poll_shim not for coroutine impl type: ({:?})", instance);
    let ty::Coroutine(coroutine_def_id, _) = impl_ty.kind() else {
    };