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//@ compile-flags: --crate-type=lib
//@ revisions: current next
//@ ignore-compare-mode-next-solver (explicit revisions)
//@[current] check-pass
//@[next] compile-flags: -Znext-solver
//@[next] check-fail
// Test that we avoid incomplete inference when normalizing. Without this,
// `Trait`'s implicit `MetaSized` supertrait requires proving `T::Assoc<_>: MetaSized`
// before checking the `new` arguments, resulting in eagerly constraining the inference
// var to `u32`. This is undesirable and would breaking code.
pub trait Trait {
type Assoc<G>: OtherTrait<G>;
}
pub trait OtherTrait<R> {
fn new(r: R) -> R {
r
}
}
pub fn function<T: Trait>()
where
T::Assoc<[u32; 1]>: Clone,
{
let _x = T::Assoc::new(());
//[next]~^ ERROR mismatched types
}
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