1 files changed, 17 insertions, 0 deletions
diff --git a/test/Sema/attr-format_arg.c b/test/Sema/attr-format_arg.c
index 64a23878317c..e041c5acbffa 100644
--- a/test/Sema/attr-format_arg.c
+++ b/test/Sema/attr-format_arg.c
@@ -4,10 +4,27 @@ int printf(const char *, ...);
 
 const char* f(const char *s) __attribute__((format_arg(1)));
 
+const char *h(const char *msg1, const char *msg2)
+    __attribute__((__format_arg__(1))) __attribute__((__format_arg__(2)));
+
 void g(const char *s) {
   printf("%d", 123);
   printf("%d %d", 123); // expected-warning{{more '%' conversions than data arguments}}
 
   printf(f("%d"), 123);
   printf(f("%d %d"), 123); // expected-warning{{more '%' conversions than data arguments}}
+
+  printf(h(
+    "", // expected-warning {{format string is empty}}
+    ""  // expected-warning {{format string is empty}}
+  ), 123);
+  printf(h(
+    "%d",
+    ""  // expected-warning {{format string is empty}}
+  ), 123);
+  printf(h(
+    "", // expected-warning {{format string is empty}}
+    "%d"
+  ), 123);
+  printf(h("%d", "%d"), 123);
 }