1 files changed, 14 insertions, 0 deletions
diff --git a/src/test/ui/reachable/unreachable-arm.rs b/src/test/ui/reachable/unreachable-arm.rs
new file mode 100644
index 000000000..3277bf0d5
--- /dev/null
+++ b/src/test/ui/reachable/unreachable-arm.rs
@@ -0,0 +1,14 @@
+#![feature(box_patterns)]
+
+#![allow(dead_code)]
+#![deny(unreachable_patterns)]
+
+enum Foo { A(Box<Foo>, isize), B(usize), }
+
+fn main() {
+    match Foo::B(1) {
+        Foo::B(_) | Foo::A(box _, 1) => { }
+        Foo::A(_, 1) => { } //~ ERROR unreachable pattern
+        _ => { }
+    }
+}