1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/defaults-mixed.rs b/src/test/ui/associated-types/defaults-mixed.rs
new file mode 100644
index 000000000..c91b8de39
--- /dev/null
+++ b/src/test/ui/associated-types/defaults-mixed.rs
@@ -0,0 +1,34 @@
+#![feature(associated_type_defaults)]
+
+// Tests that a trait with one defaulted and one non-defaulted assoc. type behaves properly.
+
+trait Trait {
+    type Foo = u8;
+    type Bar;
+}
+
+// `Bar` must be specified
+impl Trait for () {}
+//~^ error: not all trait items implemented, missing: `Bar`
+
+impl Trait for bool {
+//~^ error: not all trait items implemented, missing: `Bar`
+    type Foo = ();
+}
+
+impl Trait for u8 {
+    type Bar = ();
+}
+
+impl Trait for u16 {
+    type Foo = String;
+    type Bar = bool;
+}
+
+fn main() {
+    let _: <u8 as Trait>::Foo = 0u8;
+    let _: <u8 as Trait>::Bar = ();
+
+    let _: <u16 as Trait>::Foo = String::new();
+    let _: <u16 as Trait>::Bar = true;
+}