Static rustc_lint::bad_style::NON_UPPER_CASE_GLOBALS[]

pub static NON_UPPER_CASE_GLOBALS: &Lint = &::lint::Lint{name: "NON_UPPER_CASE_GLOBALS",
              default_level: ::lint::Warn,
              desc: "static constants should have uppercase identifiers",
              edition_lint_opts: None,}
🔬 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?