1 // RUN: %clang_cc1 -fsyntax-only -fblocks -Wformat -verify %s -Wno-error=non-pod-varargs
2 
3 int (^block) (int, const char *,...) __attribute__((__format__(__printf__,2,3))) = ^ __attribute__((__format__(__printf__,2,3))) (int arg, const char *format,...) {return 5;};
4 
5 class HasNoCStr {
6   const char *str;
7  public:
8   HasNoCStr(const char *s): str(s) { }
9   const char *not_c_str() {return str;}
10 };
11 
12 void test_block() {
13   const char str[] = "test";
14   HasNoCStr hncs(str);
15   int n = 4;
16   block(n, "%s %d", str, n); // no-warning
17   block(n, "%s %s", hncs, n); // expected-warning{{cannot pass non-POD object of type 'HasNoCStr' to variadic block; expected type from format string was 'char *'}} expected-warning{{format specifies type 'char *' but the argument has type 'int'}}
18 }
19