C's comma operator performs lvalue conversion on both its operands;

require them to have complete types.

llvm-svn: 116297

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/test/Sema/exprs.c b/clang/test/Sema/exprs.c
index 56a52bed1bc..d6e17ff6ecc 100644
--- a/clang/test/Sema/exprs.c
+++ b/clang/test/Sema/exprs.c
@@ -150,3 +150,10 @@ int test20(int x) {
   // no warning, this is an idiom for "true" in old C style.
   return x && (signed char)1;
 }
+
+struct Test21; // expected-note 2 {{forward declaration}}
+void test21(volatile struct Test21 *ptr) {
+  void test21_help(void);
+  (test21_help(), *ptr); // expected-error {{incomplete type 'struct Test21' where a complete type is required}}
+  (*ptr, test21_help()); // expected-error {{incomplete type 'struct Test21' where a complete type is required}}
+}