[rustc.git] / src / test / ui / nll / relate_tys / issue-48071.rs

// Regression test for #48071. This test used to ICE because -- in
// the leak-check -- it would pass since we knew that the return type
// was `'static`, and hence `'static: 'a` was legal even for a
// placeholder region, but in NLL land it would fail because we had
// rewritten `'static` to a region variable.
//
// check-pass

trait Foo {
    fn foo(&self) { }
}

impl Foo for () {
}

type MakeFooFn = for<'a> fn(&'a u8) -> Box<dyn Foo + 'a>;

fn make_foo(x: &u8) -> Box<dyn Foo + 'static> {
    Box::new(())
}

fn main() {
    let x: MakeFooFn = make_foo as MakeFooFn;
}
Commit	Line	Data
8faf50e0 XL	1	// Regression test for #48071. This test used to ICE because -- in
	2	// the leak-check -- it would pass since we knew that the return type
	3	// was `'static`, and hence `'static: 'a` was legal even for a
	4	// placeholder region, but in NLL land it would fail because we had
	5	// rewritten `'static` to a region variable.
	6	//
60c5eb7d	7	// check-pass
8faf50e0	8
8faf50e0 XL	9	trait Foo {
	10	fn foo(&self) { }
	11	}
	12
	13	impl Foo for () {
	14	}
	15
	16	type MakeFooFn = for<'a> fn(&'a u8) -> Box<dyn Foo + 'a>;
	17
	18	fn make_foo(x: &u8) -> Box<dyn Foo + 'static> {
	19	Box::new(())
	20	}
	21
	22	fn main() {
	23	let x: MakeFooFn = make_foo as MakeFooFn;
	24	}