rust/tests/ui/traits/new-solver/tait-eq-tait.rs

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// compile-flags: -Ztrait-solver=next
// check-pass
// Not exactly sure if this is the inference behavior we *want*,
// but it is a side-effect of the lazy normalization of TAITs.
#![feature(type_alias_impl_trait)]
type Tait = impl Sized;
type Tait2 = impl Sized;
fn mk<T>() -> T { todo!() }
fn main() {
let x: Tait = 1u32;
let y: Tait2 = x;
}