1 files changed, 34 insertions, 0 deletions
diff --git a/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-bound.rs b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-bound.rs
new file mode 100644
index 000000000..dce88b88c
--- /dev/null
+++ b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-bound.rs
@@ -0,0 +1,34 @@
+// Test that we are able to establish that `<T as
+// MyTrait<'a>>::Output` outlives `'b` here. We need to prove however
+// that `<T as MyTrait<'a>>::Output` outlives `'a`, so we also have to
+// prove that `'b: 'a`.
+
+trait MyTrait<'a> {
+    type Output;
+}
+
+fn foo1<'a, 'b, T>() -> &'a ()
+where
+    T: MyTrait<'a>,
+    <T as MyTrait<'a>>::Output: 'b,
+{
+    bar::<T::Output>() //~ ERROR may not live long enough
+}
+
+fn foo2<'a, 'b, T>() -> &'a ()
+where
+    T: MyTrait<'a>,
+    <T as MyTrait<'a>>::Output: 'b,
+    'b: 'a,
+{
+    bar::<T::Output>() // OK
+}
+
+fn bar<'a, T>() -> &'a ()
+where
+    T: 'a,
+{
+    &()
+}
+
+fn main() {}