os-rust/tests/ui-fulldeps/pathless-extern-unstable.rs

//@ ignore-stage1 FIXME: this line can be removed once these new error messages are in stage 0 rustc
//@ edition:2018
//@ compile-flags:--extern rustc_middle

// Test that `--extern rustc_middle` fails with `rustc_private`.

pub use rustc_middle;
//~^ ERROR use of unstable library feature `rustc_private`

fn main() {}