tests/ui/consts/recursive-block.rs - rust-lang/rust - Git at Google

 const fn foo<T>() {
     const { foo::<&T>() } //~ ERROR: queries overflow the depth limit!
 }

 fn main () {
     const X: () = foo::<i32>();
 }
	const fn foo<T>() {
	const { foo::<&T>() } //~ ERROR: queries overflow the depth limit!
	}

	fn main () {
	const X: () = foo::<i32>();
	}