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Add run-pass test for rust-lang#44005
Closes rust-lang#44005
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src/test/run-pass/issue-44005.rs

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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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pub trait Foo<'a> {
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type Bar;
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fn foo(&'a self) -> Self::Bar;
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}
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impl<'a, 'b, T: 'a> Foo<'a> for &'b T {
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type Bar = &'a T;
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fn foo(&'a self) -> &'a T {
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self
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}
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}
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pub fn uncallable<T, F>(x: T, f: F)
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where T: for<'a> Foo<'a>,
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F: for<'a> Fn(<T as Foo<'a>>::Bar)
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{
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f(x.foo());
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}
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pub fn catalyst(x: &i32) {
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broken(x, |_| {})
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}
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pub fn broken<F: Fn(&i32)>(x: &i32, f: F) {
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uncallable(x, |y| f(y));
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}
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fn main() { }
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