62     let rustc = rustc_minor_version();  in main()  localVariable
63     if cfg!(not(feature = "std")) && rustc.map_or(false, |rustc| rustc < 81) {  in main()
67     let rustc = match rustc {  in main()  localVariable
68         Some(rustc) => rustc,  in main()
74     if rustc < 65 {  in main()
91     let rustc = cargo_env_var("RUSTC");  in compile_probe()  localVariable
106     let mut rustc = rustc_wrapper  in compile_probe()  localVariable
109         .chain(iter::once(rustc));  in compile_probe()
110     let mut cmd = Command::new(rustc.next().unwrap());  in compile_probe()
111     cmd.args(rustc);  in compile_probe()
159     let rustc = cargo_env_var("RUSTC");  in rustc_minor_version()  localVariable
160     let output = Command::new(rustc).arg("--version").output().ok()?;  in rustc_minor_version()