1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
2 
3 struct X1 {
4   X1();
5 };
6 
7 struct X2 {
8   X2();
9   ~X2();
10 };
11 
12 struct X3 {
13   X3(const X3&) = default;
14 };
15 
16 struct X4 {
17   X4(const X4&) = default;
18   X4(X4&);
19 };
20 
21 void vararg(...);
22 
23 void f(X1 x1, X2 x2, X3 x3, X4 x4) {
24   vararg(x1); // OK
25   vararg(x2); // expected-error{{cannot pass object of non-trivial type 'X2' through variadic function; call will abort at runtime}}
26   vararg(x3); // OK
27   vararg(x4); // expected-error{{cannot pass object of non-trivial type 'X4' through variadic function; call will abort at runtime}}
28 }
29 
30 
31 namespace PR11131 {
32   struct S;
33 
34   S &getS();
35 
36   void f(...);
37 
38   void g() {
39     (void)sizeof(f(getS()));
40   }
41 }
42