1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.rs b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.rs
new file mode 100644
index 000000000..987148dce
--- /dev/null
+++ b/tests/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.rs
@@ -0,0 +1,25 @@
+// Test that if we need to prove that `<T as MyTrait<'a>>::Output:
+// 'a`, but we only know that `<T as MyTrait<'b>>::Output: 'a`, that
+// doesn't suffice.
+
+trait MyTrait<'a> {
+    type Output;
+}
+
+fn foo1<'a, 'b, T>() -> &'a ()
+where
+    for<'x> T: MyTrait<'x>,
+    <T as MyTrait<'b>>::Output: 'a,
+{
+    bar::<<T as MyTrait<'a>>::Output>()
+    //~^ ERROR the associated type `<T as MyTrait<'_>>::Output` may not live long enough
+}
+
+fn bar<'a, T>() -> &'a ()
+where
+    T: 'a,
+{
+    &()
+}
+
+fn main() {}