{"ast_node_type":"other","tokens":[{"end":5,"kind":"keyword","start":0,"text":"{"}]}
    {
    ) -> InterpResult<'tcx, Option<AllocRef<'a, 'tcx, M::Provenance, M::AllocExtra, M::Bytes>>>
        let size_i64 = i64::try_from(size.bytes()).unwrap(); // it would be an error to even ask for more than isize::MAX bytes