Reject 'int a[1][];' in Sema rather than crashing in IR generation. Found by a
misreduction of PR13290.

llvm-svn: 159905
diff --git a/clang/test/SemaCXX/array-bound-merge.cpp b/clang/test/SemaCXX/array-bound-merge.cpp
index 74f58fa..8fb2ec5 100644
--- a/clang/test/SemaCXX/array-bound-merge.cpp
+++ b/clang/test/SemaCXX/array-bound-merge.cpp
@@ -7,3 +7,5 @@
 int b[];
 extern int c[1];
 int c[] = {1,2}; // expected-error {{excess elements in array initializer}}
+
+int d[1][]; // expected-error {{array has incomplete element type 'int []'}}