1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/traits/trivial_impl.rs b/tests/ui/traits/trivial_impl.rs
new file mode 100644
index 000000000..6ac8c744b
--- /dev/null
+++ b/tests/ui/traits/trivial_impl.rs
@@ -0,0 +1,18 @@
+//! This test checks that we do need to implement
+//! all members, even if their where bounds only hold
+//! due to other impls.
+
+trait Foo<T> {
+    fn foo()
+    where
+        Self: Foo<()>;
+}
+
+impl Foo<()> for () {
+    fn foo() {}
+}
+
+impl Foo<u32> for () {}
+//~^ ERROR: not all trait items implemented, missing: `foo`
+
+fn main() {}