C++11 [class.ctor]p5 says that
  A defaulted default constructor for a class X is defined as deleted if [...]
    -  X is a union and all of its variant members are of const-qualified type.

A pedantic reading therefore says that

 union X { };

has a deleted default constructor, which is both silly and almost
certainly unintended. Pretend as if this this read

    - X is a union with one or more variant members, and all of its
      variant members are of const-qualified type. 

llvm-svn: 151394
diff --git a/clang/test/SemaCXX/cxx0x-deleted-default-ctor.cpp b/clang/test/SemaCXX/cxx0x-deleted-default-ctor.cpp
index 0f08635..f6e5593 100644
--- a/clang/test/SemaCXX/cxx0x-deleted-default-ctor.cpp
+++ b/clang/test/SemaCXX/cxx0x-deleted-default-ctor.cpp
@@ -121,11 +121,11 @@
 
 // See also rdar://problem/8125400.
 namespace empty {
-  static union {}; // expected-error {{implicitly-deleted default constructor}} expected-note {{here}}
-  static union { union {}; }; // expected-error {{implicitly-deleted default constructor}} expected-note {{here}}
+  static union {};
+  static union { union {}; };
   static union { struct {}; };
-  static union { union { union {}; }; }; // expected-error {{implicitly-deleted default constructor}} expected-note {{here}}
+  static union { union { union {}; }; };
   static union { union { struct {}; }; };
-  static union { struct { union {}; }; }; // expected-error {{implicitly-deleted default constructor}} expected-note {{here}}
+  static union { struct { union {}; }; };
   static union { struct { struct {}; }; };
 }