1 files changed, 9 insertions, 0 deletions
diff --git a/test/SemaCXX/anonymous-union-cxx11.cpp b/test/SemaCXX/anonymous-union-cxx11.cpp
index 9f987a9681cd..b0dd1a874deb 100644
--- a/test/SemaCXX/anonymous-union-cxx11.cpp
+++ b/test/SemaCXX/anonymous-union-cxx11.cpp
@@ -12,3 +12,12 @@ namespace PR12866 {
     (void)sizeof(bar::member);
   }
 }
+
+namespace PR20021 {
+class C {
+  union {
+    static_assert(true, "");
+    int i;
+  };
+};
+}