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

 fn main() {}

 const fn slice(&[a, b]: &[i32]) -> i32 {
     //~^ ERROR refutable pattern in function argument
     a + b
 }
	fn main() {}

	const fn slice(&[a, b]: &[i32]) -> i32 {
	//~^ ERROR refutable pattern in function argument
	a + b
	}