1 files changed, 36 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/not_a_defining_use.rs b/src/test/ui/type-alias-impl-trait/not_a_defining_use.rs
new file mode 100644
index 000000000..fa47d13f5
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/not_a_defining_use.rs
@@ -0,0 +1,36 @@
+#![feature(type_alias_impl_trait)]
+
+use std::fmt::Debug;
+
+fn main() {}
+
+type Two<T, U> = impl Debug;
+
+fn three<T: Debug, U>(t: T) -> Two<T, U> {
+    (t, 5i8)
+    //~^ ERROR `T` doesn't implement `Debug`
+}
+
+trait Bar {
+    type Blub: Debug;
+    const FOO: Self::Blub;
+}
+
+impl Bar for u32 {
+    type Blub = i32;
+    const FOO: i32 = 42;
+}
+
+fn four<T: Debug, U: Bar>(t: T) -> Two<T, U> {
+    (t, <U as Bar>::FOO)
+    //~^ ERROR `U: Bar` is not satisfied
+    //~| ERROR `T` doesn't implement `Debug`
+}
+
+fn is_sync<T: Sync>() {}
+
+fn asdfl() {
+    //FIXME(oli-obk): these currently cause cycle errors
+    //is_sync::<Two<i32, u32>>();
+    //is_sync::<Two<i32, *const i32>>();
+}