{"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"Some(commit_hash)"}]}
        Some(commit_hash) => commit_hash,
    let rustc_commit = match rustc_version_info(env.get("RUSTC").map(|s| s.as_str()))?.commit_hash {
        None => return Err("Couldn't retrieve rustc commit hash".to_string()),