--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/PCH/field-designator.c	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,35 @@
+// RUN: %clang_cc1 %s -include %s
+// RUN: %clang_cc1 %s -emit-pch -o %t.pch
+// RUN: %clang_cc1 %s -include-pch %t.pch
+
+// rdar://12239321 Make sure we don't emit a bogus
+//     error: field designator 'e' does not refer to a non-static data member
+
+#ifndef HEADER
+#define HEADER
+//===----------------------------------------------------------------------===//
+
+struct U {
+  union {
+    struct {
+      int e;
+      int f;
+    };
+
+    int a;
+  };
+};
+
+//===----------------------------------------------------------------------===//
+#else
+#if !defined(HEADER)
+# error Header inclusion order messed up
+#endif
+//===----------------------------------------------------------------------===//
+
+void bar() {
+  static const struct U plan = { .e = 1 };
+}
+
+//===----------------------------------------------------------------------===//
+#endif