1 files changed, 13 insertions, 0 deletions
diff --git a/src/test/ui/union/union-const-pat.rs b/src/test/ui/union/union-const-pat.rs
new file mode 100644
index 000000000..e7cb248a2
--- /dev/null
+++ b/src/test/ui/union/union-const-pat.rs
@@ -0,0 +1,13 @@
+union U {
+    a: usize,
+    b: usize,
+}
+
+const C: U = U { a: 10 };
+
+fn main() {
+    match C {
+        C => {} //~ ERROR cannot use unions in constant patterns
+        _ => {}
+    }
+}