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

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// 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.
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// Make sure that fn-to-block coercion isn't incorrectly lifted over
// other tycons.
fn coerce(b: &fn()) -> extern fn() {
fn lol(+f: extern fn(+v: &fn()) -> extern fn(),
+g: &fn()) -> extern fn() { return f(g); }
fn fn_id(+f: extern fn()) -> extern fn() { return f }
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return lol(fn_id, b);
//~^ ERROR mismatched types
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}
fn main() {
let i = 8;
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let f = coerce(|| error!(i) );
f();
}