Static rustc_lint::builtin::UNNAMEABLE_TEST_FUNCTIONS[]

static UNNAMEABLE_TEST_FUNCTIONS: &Lint = &::lint::Lint{name: "UNNAMEABLE_TEST_FUNCTIONS",
              default_level: ::lint::Warn,
              desc:
                  "detects an function that cannot be named being marked as #[test]",
              edition_lint_opts: None,
              report_in_external_macro: false,}
🔬 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?