1 error[E0658]: C-variadic functions are unstable
2 --> $DIR/feature-gate-c_variadic.rs:3:1
4 LL | pub unsafe extern "C" fn test(_: i32, ap: ...) { }
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
7 = note: see issue #44930 <https://github.com/rust-lang/rust/issues/44930> for more information
8 = help: add `#![feature(c_variadic)]` to the crate attributes to enable
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0658`.