src/test/ui/const-generics/issue-61336-1.rs

#![feature(const_generics)]
//~^ WARN the feature `const_generics` is incomplete and may cause the compiler to crash

fn f<T: Copy, const N: usize>(x: T) -> [T; N] {
    [x; N]
    //~^ ERROR array lengths can't depend on generic parameters
}

fn main() {
    let x: [u32; 5] = f::<u32, 5>(3);
    assert_eq!(x, [3u32; 5]);
}