1 files changed, 38 insertions, 0 deletions
diff --git a/tests/ui/nll/ty-outlives/impl-trait-outlives.rs b/tests/ui/nll/ty-outlives/impl-trait-outlives.rs
new file mode 100644
index 000000000..68ccb51fc
--- /dev/null
+++ b/tests/ui/nll/ty-outlives/impl-trait-outlives.rs
@@ -0,0 +1,38 @@
+// compile-flags:-Zverbose
+
+#![allow(warnings)]
+
+use std::fmt::Debug;
+
+fn no_region<'a, T>(x: Box<T>) -> impl Debug + 'a
+where
+    T: Debug,
+{
+    x
+    //~^ ERROR the parameter type `T` may not live long enough [E0309]
+}
+
+fn correct_region<'a, T>(x: Box<T>) -> impl Debug + 'a
+where
+    T: 'a + Debug,
+{
+    x
+}
+
+fn wrong_region<'a, 'b, T>(x: Box<T>) -> impl Debug + 'a
+where
+    T: 'b + Debug,
+{
+    x
+    //~^ ERROR the parameter type `T` may not live long enough [E0309]
+}
+
+fn outlives_region<'a, 'b, T>(x: Box<T>) -> impl Debug + 'a
+where
+    T: 'b + Debug,
+    'b: 'a,
+{
+    x
+}
+
+fn main() {}