1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/self-referential.rs b/src/test/ui/type-alias-impl-trait/self-referential.rs
new file mode 100644
index 000000000..3ff5406a3
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/self-referential.rs
@@ -0,0 +1,28 @@
+#![feature(type_alias_impl_trait)]
+
+type Bar<'a, 'b> = impl PartialEq<Bar<'b, 'a>> + std::fmt::Debug;
+
+fn bar<'a, 'b>(i: &'a i32) -> Bar<'a, 'b> {
+    //~^ ERROR can't compare `&i32` with `Bar<'b, 'a>`
+    i
+}
+
+type Foo<'a, 'b> = (i32, impl PartialEq<Foo<'a, 'b>> + std::fmt::Debug);
+
+fn foo<'a, 'b>(i: &'a i32) -> Foo<'a, 'b> {
+    //~^ ERROR can't compare `&i32` with `(i32, &i32)`
+    (42, i)
+}
+
+type Moo<'a, 'b> = (i32, impl PartialEq<Moo<'b, 'a>> + std::fmt::Debug);
+
+fn moo<'a, 'b>(i: &'a i32) -> Moo<'a, 'b> {
+    //~^ ERROR can't compare `&i32` with `(i32, Moo<'b, 'a>::{opaque#0})`
+    (42, i)
+}
+
+fn main() {
+    let meh = 42;
+    let muh = 69;
+    assert_eq!(bar(&meh), bar(&meh));
+}