1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/pattern/usefulness/issue-40221.rs b/src/test/ui/pattern/usefulness/issue-40221.rs
new file mode 100644
index 000000000..e1f7e975b
--- /dev/null
+++ b/src/test/ui/pattern/usefulness/issue-40221.rs
@@ -0,0 +1,16 @@
+enum P {
+    C(PC),
+}
+
+enum PC {
+    Q,
+    QA,
+}
+
+fn test(proto: P) {
+    match proto { //~ ERROR non-exhaustive patterns
+        P::C(PC::Q) => (),
+    }
+}
+
+fn main() {}