[][src]Function rustc::session::config::opt::stable

fn stable<F>(name: &'static str, f: F) -> RustcOptGroup where
    F: Fn(&mut Options) -> &mut Options + 'static, 
🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?