New testcase that crashes the C++ FE, encountered while working on PR445

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16532 91177308-0d34-0410-b5e6-96231b3b80d8

test/C++Frontend/2004-09-27-CompilerCrash.cpp

@@ -0,0 +1,17 @@
+
+
+struct Pass {} ;
+template<typename PassName>
+Pass *callDefaultCtor() { return new PassName(); }
+
+void foo(Pass *(*C)());
+
+#include <bits/c++config.h>
+#include <bits/stringfwd.h>
+#include <bits/char_traits.h>
+#include <memory>       // For allocator.
+#include <bits/basic_string.h>
+
+bool foo(std::string &X) {
+  return X.empty();
+}