use_self - add test case of #2843

rust-lang · Apr 26, 2020 · f0dc26f · f0dc26f
1 parent 533d824
commit f0dc26f
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diff --git a/tests/ui/use_self.fixed b/tests/ui/use_self.fixed
@@ -336,3 +336,17 @@ mod issue4140 {
         }
     }
 }
+
+mod issue2843 {
+    trait Foo {
+        type Bar;
+    }
+
+    impl Foo for usize {
+        type Bar = u8;
+    }
+
+    impl<T: Foo> Foo for Option<T> {
+        type Bar = Option<T::Bar>;
+    }
+}
diff --git a/tests/ui/use_self.rs b/tests/ui/use_self.rs
@@ -336,3 +336,17 @@ mod issue4140 {
         }
     }
 }
+
+mod issue2843 {
+    trait Foo {
+        type Bar;
+    }
+
+    impl Foo for usize {
+        type Bar = u8;
+    }
+
+    impl<T: Foo> Foo for Option<T> {
+        type Bar = Option<T::Bar>;
+    }
+}