1 files changed, 29 insertions, 1 deletions
diff --git a/clang/test/CXX/special/class.init/class.base.init/p8-0x.cpp b/clang/test/CXX/special/class.init/class.base.init/p8-0x.cpp
index 8512a9f7bb3..81ed9c25705 100644
--- a/clang/test/CXX/special/class.init/class.base.init/p8-0x.cpp
+++ b/clang/test/CXX/special/class.init/class.base.init/p8-0x.cpp
@@ -5,11 +5,15 @@ struct S {
   int &a; // expected-note 2{{here}}
   int &b = n;
 
+  union {
+    const int k = 42;
+  };
+
   S() {} // expected-error {{constructor for 'S' must explicitly initialize the reference member 'a'}}
   S(int) : a(n) {} // ok
   S(char) : b(n) {} // expected-error {{constructor for 'S' must explicitly initialize the reference member 'a'}}
   S(double) : a(n), b(n) {} // ok
-};
+} s(0);
 
 union U {
   int a = 0;
@@ -21,3 +25,27 @@ union U {
   U(char) : b('y') {} // desired-error {{at most one member of a union may be initialized}}
   U(double) : a(1), b('y') {} // desired-error {{at most one member of a union may be initialized}}
 };
+
+// PR10954: variant members do not acquire an implicit initializer.
+namespace VariantMembers {
+  struct NoDefaultCtor {
+    NoDefaultCtor(int);
+  };
+  union V {
+    NoDefaultCtor ndc;
+    int n;
+
+    V() {}
+    V(int n) : n(n) {}
+    V(int n, bool) : ndc(n) {}
+  };
+  struct K {
+    union {
+      NoDefaultCtor ndc;
+      int n;
+    };
+    K() {}
+    K(int n) : n(n) {}
+    K(int n, bool) : ndc(n) {}
+  };
+}