1 files changed, 40 insertions, 0 deletions
diff --git a/tests/ui/nll/ty-outlives/projection-no-regions-fn.rs b/tests/ui/nll/ty-outlives/projection-no-regions-fn.rs
new file mode 100644
index 000000000..a10a0366a
--- /dev/null
+++ b/tests/ui/nll/ty-outlives/projection-no-regions-fn.rs
@@ -0,0 +1,40 @@
+// compile-flags:-Zverbose
+
+#![allow(warnings)]
+
+trait Anything { }
+
+impl<T> Anything for T { }
+
+fn no_region<'a, T>(mut x: T) -> Box<dyn Anything + 'a>
+where
+    T: Iterator,
+{
+    Box::new(x.next())
+    //~^ ERROR the associated type `<T as Iterator>::Item` may not live long enough
+}
+
+fn correct_region<'a, T>(mut x: T) -> Box<dyn Anything + 'a>
+where
+    T: 'a + Iterator,
+{
+    Box::new(x.next())
+}
+
+fn wrong_region<'a, 'b, T>(mut x: T) -> Box<dyn Anything + 'a>
+where
+    T: 'b + Iterator,
+{
+    Box::new(x.next())
+    //~^ ERROR the associated type `<T as Iterator>::Item` may not live long enough
+}
+
+fn outlives_region<'a, 'b, T>(mut x: T) -> Box<dyn Anything + 'a>
+where
+    T: 'b + Iterator,
+    'b: 'a,
+{
+    Box::new(x.next())
+}
+
+fn main() {}