File: issue-89013.rs

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trait Foo<const N: usize> {
    fn do_x(&self) -> [u8; N];
}

struct Bar;

const T: usize = 42;

impl Foo<N = const 3> for Bar {
//~^ ERROR expected lifetime, type, or constant, found keyword `const`
//~| ERROR associated item constraints are not allowed here
//~| ERROR associated const equality is incomplete
    fn do_x(&self) -> [u8; 3] {
        [0u8; 3]
    }
}

fn main() {}