1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/pattern/usefulness/non-exhaustive-match-nested.rs b/tests/ui/pattern/usefulness/non-exhaustive-match-nested.rs
new file mode 100644
index 000000000..69c3c7658
--- /dev/null
+++ b/tests/ui/pattern/usefulness/non-exhaustive-match-nested.rs
@@ -0,0 +1,19 @@
+enum T { A(U), B }
+enum U { C, D }
+
+fn match_nested_vecs<'a, T>(l1: Option<&'a [T]>, l2: Result<&'a [T], ()>) -> &'static str {
+    match (l1, l2) { //~ ERROR non-exhaustive patterns: `(Some(&[]), Err(_))` not covered
+        (Some(&[]), Ok(&[])) => "Some(empty), Ok(empty)",
+        (Some(&[_, ..]), Ok(_)) | (Some(&[_, ..]), Err(())) => "Some(non-empty), any",
+        (None, Ok(&[])) | (None, Err(())) | (None, Ok(&[_])) => "None, Ok(less than one element)",
+        (None, Ok(&[_, _, ..])) => "None, Ok(at least two elements)"
+    }
+}
+
+fn main() {
+    let x = T::A(U::C);
+    match x { //~ ERROR non-exhaustive patterns: `T::A(U::C)` not covered
+        T::A(U::D) => { panic!("hello"); }
+        T::B => { panic!("goodbye"); }
+    }
+}