Fix a couple crashes on invalid input.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51622 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/asm.c b/test/Parser/asm.c
index 6a19aca..c23d31a 100644
--- a/test/Parser/asm.c
+++ b/test/Parser/asm.c
@@ -8,3 +8,8 @@
   asm("foo" : "=r" (a)); // expected-error {{use of undeclared identifier 'a'}}
   asm("foo" : : "r" (b)); // expected-error {{use of undeclared identifier 'b'}} 
 }
+
+
+// rdar://5952468
+__asm ; // expected-error {{expected '(' after 'asm'}}
+