Static rustc_lint::builtin::UNIONS_WITH_DROP_FIELDS[]

static UNIONS_WITH_DROP_FIELDS: &Lint = &::lint::Lint{name: "UNIONS_WITH_DROP_FIELDS",
              default_level: ::lint::Warn,
              desc:
                  "use of unions that contain fields with possibly non-trivial drop code",
              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?