{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"println!(\"cargo:rerun-if-env-changed=RUSTC_BOOTSTRAP\");"}]}
    println!("cargo:rerun-if-env-changed=RUSTC_BOOTSTRAP");
    println!("cargo:rerun-if-changed=build.rs");
    if std::env::var("RUSTC_BOOTSTRAP").is_err() {