Fix PR5531.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89106 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/warn-unused-variables.cpp b/test/SemaCXX/warn-unused-variables.cpp
index 704fbe2..0198636 100644
--- a/test/SemaCXX/warn-unused-variables.cpp
+++ b/test/SemaCXX/warn-unused-variables.cpp
@@ -12,3 +12,23 @@
   A a;
   B b;
 }
+
+// PR5531
+namespace PR5531 {
+  struct A {
+  };
+
+  struct B {
+    B(int);
+  };
+
+  struct C {
+    ~C();
+  };
+
+  void test() {
+    A();
+    B(17);
+    C();
+  }
+}