1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/issue-89952.rs b/src/test/ui/type-alias-impl-trait/issue-89952.rs
new file mode 100644
index 000000000..dc0f19c04
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/issue-89952.rs
@@ -0,0 +1,31 @@
+// check-pass
+
+#![feature(type_alias_impl_trait)]
+
+trait SomeTrait {}
+impl SomeTrait for () {}
+
+trait MyFuture {
+    type Output;
+}
+impl<T> MyFuture for T {
+    type Output = T;
+}
+
+trait ReturnsFuture {
+    type Output: SomeTrait;
+    type Future: MyFuture<Output = Result<Self::Output, ()>>;
+    fn func() -> Self::Future;
+}
+
+struct Foo;
+
+impl ReturnsFuture for Foo {
+    type Output = impl SomeTrait;
+    type Future = impl MyFuture<Output = Result<Self::Output, ()>>;
+    fn func() -> Self::Future {
+        Result::<(), ()>::Err(())
+    }
+}
+
+fn main() {}