1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/pattern/usefulness/issue-31221.rs b/src/test/ui/pattern/usefulness/issue-31221.rs
new file mode 100644
index 000000000..e03f1ec5b
--- /dev/null
+++ b/src/test/ui/pattern/usefulness/issue-31221.rs
@@ -0,0 +1,34 @@
+#![allow(dead_code)]
+#![allow(unused_variables)]
+#![allow(non_snake_case)]
+#![deny(unreachable_patterns)]
+
+#[derive(Clone, Copy)]
+enum Enum {
+    Var1,
+    Var2,
+}
+
+fn main() {
+    use Enum::*;
+    let s = Var1;
+    match s {
+        Var1 => (),
+        Var3 => (),
+        Var2 => (),
+        //~^ ERROR unreachable pattern
+    };
+    match &s {
+        &Var1 => (),
+        &Var3 => (),
+        &Var2 => (),
+        //~^ ERROR unreachable pattern
+    };
+    let t = (Var1, Var1);
+    match t {
+        (Var1, b) => (),
+        (c, d) => (),
+        anything => ()
+        //~^ ERROR unreachable pattern
+    };
+}