1 files changed, 21 insertions, 0 deletions
diff --git a/clang/test/Sema/block-printf-attribute-1.c b/clang/test/Sema/block-printf-attribute-1.c
new file mode 100644
index 0000000..dd678a5
--- /dev/null
+++ b/clang/test/Sema/block-printf-attribute-1.c
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 %s -fsyntax-only -verify -fblocks
+
+#include <stdarg.h>
+
+int main() {
+  void (^b) (int arg, const char * format, ...) __attribute__ ((__format__ (__printf__, 1, 3))) =   // expected-error {{format argument not a string type}}
+    ^ __attribute__ ((__format__ (__printf__, 1, 3))) (int arg, const char * format, ...) {}; // expected-error {{format argument not a string type}}
+ 
+  void (^z) (int arg, const char * format, ...) __attribute__ ((__format__ (__printf__, 2, 3))) = ^ __attribute__ ((__format__ (__printf__, 2, 3))) (int arg, const char * format, ...) {};
+
+  z(1, "%s", 1); // expected-warning{{format specifies type 'char *' but the argument has type 'int'}}
+  z(1, "%s", "HELLO"); // no-warning
+}
+
+void multi_attr(va_list ap, int *x, long *y) {
+  // Handle block with multiple format attributes.
+  void (^vprintf_scanf) (const char *, va_list, const char *, ...) __attribute__((__format__(__printf__, 1, 0))) __attribute__((__format__(__scanf__, 3, 4))) =
+  ^ __attribute__((__format__(__printf__, 1, 0))) __attribute__((__format__(__scanf__, 3, 4))) (const char *str, va_list args, const char *fmt, ...) {};
+
+  vprintf_scanf("%", ap, "%d"); // expected-warning {{incomplete format specifier}}, expected-warning {{more '%' conversions than data arguments}}
+}