rust/tests/ui/traits/unconstrained-projection-normalization.rs

// Make sure we don't ICE in `normalize_erasing_regions` when normalizing
// an associated type in an impl with unconstrained non-lifetime params.

struct Thing;

pub trait Every {
    type Assoc;
}
impl<T: ?Sized> Every for Thing {
//~^ ERROR the type parameter `T` is not constrained
    type Assoc = T;
}

static I: <Thing as Every>::Assoc = 3;

fn main() {}