1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/specialization/defaultimpl/specialization-trait-item-not-implemented.rs b/src/test/ui/specialization/defaultimpl/specialization-trait-item-not-implemented.rs
new file mode 100644
index 000000000..3c5414469
--- /dev/null
+++ b/src/test/ui/specialization/defaultimpl/specialization-trait-item-not-implemented.rs
@@ -0,0 +1,23 @@
+// Tests that default impls do not have to supply all items but regular impls do.
+
+#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+
+trait Foo {
+    fn foo_one(&self) -> &'static str;
+    fn foo_two(&self) -> &'static str;
+}
+
+struct MyStruct;
+
+default impl<T> Foo for T {
+    fn foo_one(&self) -> &'static str {
+        "generic"
+    }
+}
+
+impl Foo for MyStruct {}
+//~^ ERROR not all trait items implemented, missing: `foo_two` [E0046]
+
+fn main() {
+    println!("{}", MyStruct.foo_one());
+}