src/test/run-fail/issue-29798.rs - third_party/rust - Git at Google

 // error-pattern:index out of bounds: the len is 5 but the index is 5

 const fn test(x: usize) -> i32 {
     [42;5][x]
 }

 fn main () {
     let _ = test(5);
 }
	// error-pattern:index out of bounds: the len is 5 but the index is 5

	const fn test(x: usize) -> i32 {
	[42;5][x]
	}

	fn main () {
	let _ = test(5);
	}