[rustc.git] / src / test / ui / type-alias-impl-trait / multiple-def-uses-in-one-fn-infer.rs

// https://github.com/rust-lang/rust/issues/73481
// This test used to cause unsoundness, since one of the two possible
// resolutions was chosen at random instead of erroring due to conflicts.

#![feature(type_alias_impl_trait)]

type Y<A, B> = impl std::fmt::Debug;

fn g<A, B>() -> (Y<A, B>, Y<B, A>) {
    (42_i64, 60) //~ ERROR concrete type differs from previous defining opaque type use
}

fn main() {}
Commit	Line	Data
5e7ed085 FG	1	// https://github.com/rust-lang/rust/issues/73481
	2	// This test used to cause unsoundness, since one of the two possible
	3	// resolutions was chosen at random instead of erroring due to conflicts.
	4
	5	#![feature(type_alias_impl_trait)]
	6
	7	type Y<A, B> = impl std::fmt::Debug;
	8
	9	fn g<A, B>() -> (Y<A, B>, Y<B, A>) {
	10	(42_i64, 60) //~ ERROR concrete type differs from previous defining opaque type use
	11	}
	12
	13	fn main() {}