re PR c++/71820 (ICE on valid C++ code: in arg_assoc_type, at cp/name-lookup.c:5583)

2017-10-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/71820
	* g++.dg/ext/typeof12.C: New.

From-SVN: r254072

gcc/testsuite/ChangeLog

+2017-10-25  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/71820
+	* g++.dg/ext/typeof12.C: New.
+
 2017-10-25  Tom de Vries  <tom@codesourcery.com>
 
 	* gcc.dg/tree-ssa/loop-1.c: Add xfail for nvptx in scan-assembler-times

gcc/testsuite/g++.dg/ext/typeof12.C

+// PR c++/71820
+
+void f (void (*) (int, int)) {}
+
+template < typename T > void g (T x, __typeof__ x) {}  // { dg-message "sorry, unimplemented: mangling" }
+
+int main ()
+{
+  f (g < int >); 
+  return 0; 
+}