issue-32201.rs

// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

extern {
    fn foo(a: i32, ...);
}

fn bar(_: *const u8) {}

fn main() {
    unsafe {
        foo(0, bar);
        //~^ ERROR can't pass `fn(*const u8) {bar}` to variadic function, cast to `fn(*const u8)`
    }
}