1 files changed, 66 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/self-referential.stderr b/src/test/ui/type-alias-impl-trait/self-referential.stderr
new file mode 100644
index 000000000..97d510f68
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/self-referential.stderr
@@ -0,0 +1,66 @@
+error[E0277]: can't compare `&i32` with `Bar<'b, 'a>`
+  --> $DIR/self-referential.rs:5:31
+   |
+LL | fn bar<'a, 'b>(i: &'a i32) -> Bar<'a, 'b> {
+   |                               ^^^^^^^^^^^ no implementation for `&i32 == Bar<'b, 'a>`
+LL |
+LL |     i
+   |     - return type was inferred to be `&i32` here
+   |
+   = help: the trait `PartialEq<Bar<'b, 'a>>` is not implemented for `&i32`
+   = help: the following other types implement trait `PartialEq<Rhs>`:
+             f32
+             f64
+             i128
+             i16
+             i32
+             i64
+             i8
+             isize
+           and 6 others
+
+error[E0277]: can't compare `&i32` with `(i32, &i32)`
+  --> $DIR/self-referential.rs:12:31
+   |
+LL | fn foo<'a, 'b>(i: &'a i32) -> Foo<'a, 'b> {
+   |                               ^^^^^^^^^^^ no implementation for `&i32 == (i32, &i32)`
+LL |
+LL |     (42, i)
+   |     ------- return type was inferred to be `(i32, &i32)` here
+   |
+   = help: the trait `PartialEq<(i32, &i32)>` is not implemented for `&i32`
+   = help: the following other types implement trait `PartialEq<Rhs>`:
+             f32
+             f64
+             i128
+             i16
+             i32
+             i64
+             i8
+             isize
+           and 6 others
+
+error[E0277]: can't compare `&i32` with `(i32, Moo<'b, 'a>::{opaque#0})`
+  --> $DIR/self-referential.rs:19:31
+   |
+LL | fn moo<'a, 'b>(i: &'a i32) -> Moo<'a, 'b> {
+   |                               ^^^^^^^^^^^ no implementation for `&i32 == (i32, Moo<'b, 'a>::{opaque#0})`
+LL |
+LL |     (42, i)
+   |     ------- return type was inferred to be `(i32, &i32)` here
+   |
+   = help: the trait `PartialEq<(i32, Moo<'b, 'a>::{opaque#0})>` is not implemented for `&i32`
+   = help: the following other types implement trait `PartialEq<Rhs>`:
+             f32
+             f64
+             i128
+             i16
+             i32
+             i64
+             i8
+             isize
+           and 6 others
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0277`.