diff --git a/src/test/ui/type-alias-impl-trait/different_lifetimes_defining_uses.rs b/src/test/ui/type-alias-impl-trait/different_lifetimes_defining_uses.rs new file mode 100644 index 0000000000000..d0001976d657e --- /dev/null +++ b/src/test/ui/type-alias-impl-trait/different_lifetimes_defining_uses.rs @@ -0,0 +1,15 @@ +#![feature(type_alias_impl_trait)] +#![allow(dead_code)] + +type OneLifetime<'a, 'b> = impl std::fmt::Debug; + +fn foo<'a, 'b>(a: &'a u32, b: &'b u32) -> OneLifetime<'a, 'b> { + a +} + +fn bar<'a, 'b>(a: &'a u32, b: &'b u32) -> OneLifetime<'a, 'b> { + //~^ ERROR: concrete type differs from previous defining opaque type use + b +} + +fn main() {} diff --git a/src/test/ui/type-alias-impl-trait/different_lifetimes_defining_uses.stderr b/src/test/ui/type-alias-impl-trait/different_lifetimes_defining_uses.stderr new file mode 100644 index 0000000000000..9493a59cf1ead --- /dev/null +++ b/src/test/ui/type-alias-impl-trait/different_lifetimes_defining_uses.stderr @@ -0,0 +1,14 @@ +error: concrete type differs from previous defining opaque type use + --> $DIR/different_lifetimes_defining_uses.rs:10:1 + | +LL | fn bar<'a, 'b>(a: &'a u32, b: &'b u32) -> OneLifetime<'a, 'b> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `&'a u32`, got `&'b u32` + | +note: previous use here + --> $DIR/different_lifetimes_defining_uses.rs:6:1 + | +LL | fn foo<'a, 'b>(a: &'a u32, b: &'b u32) -> OneLifetime<'a, 'b> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: aborting due to previous error +