Static rustc::lint::builtin::UNUSED_FEATURES

pub static UNUSED_FEATURES: &Lint = &::lint::Lint{name: "UNUSED_FEATURES",
              default_level: ::lint::Warn,
              desc:
                  "unused or unknown features found in crate-level #[feature] directives",}

🔬 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?