Static rustc::lint::builtin::UNUSED_VARIABLES

pub static UNUSED_VARIABLES: &Lint = &::lint::Lint{name: "UNUSED_VARIABLES",
              default_level: ::lint::Warn,
              desc: "detect variables which are not used in any way",}

🔬 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?