rust/src/test/compile-fail/block-coerce-no-2.rs

// Copyright 2012 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.

// Make sure that fn-to-block coercion isn't incorrectly lifted over
// other tycons.

fn main() {
    fn f(f: extern fn(extern fn(extern fn()))) {
    }

    fn g(f: extern fn(&fn())) {
    }

    f(g);
    //~^ ERROR mismatched types: expected `extern "Rust" fn(extern "Rust" fn(extern "Rust" fn()))`
}