{"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
        let file_len = u64::try_from(filename.len()).unwrap();
        let file_ptr = ecx.allocate_bytes_dedup(filename_with_nul.as_bytes()).unwrap();
        Immediate::new_slice(file_ptr.into(), file_len, ecx)