{"ast_node_type":"variable","tokens":[{"end":87,"kind":"keyword","start":0,"text":"let"}]}
        let file_ptr = ecx.allocate_bytes_dedup(filename_with_nul.as_bytes()).unwrap();
        // pointless, since that would require allocating more memory than these short strings.
        let file_len = u64::try_from(filename.len()).unwrap();