tests/ui/nll/user-annotations/issue-54124.rs - rust-lang/rust - Git at Google

 fn test<'a>() {
     let _:fn(&()) = |_:&'a ()| {}; //~ ERROR lifetime may not live long enough
     //~^ ERROR lifetime may not live long enough
 }

 fn main() {
     test();
 }
	fn test<'a>() {
	let _:fn(&()) = \|_:&'a ()\| {}; //~ ERROR lifetime may not live long enough
	//~^ ERROR lifetime may not live long enough
	}

	fn main() {
	test();
	}