re PR c++/71548 (Invalid declaration involving template template param causes crash)

	PR c++/71548
	* g++.dg/cpp0x/variadic177.C: New test.

From-SVN: r272438

gcc/testsuite/ChangeLog

+2019-06-18  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/71548
+	* g++.dg/cpp0x/variadic177.C: New test.
+
 2019-06-18  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* gcc.target/aarch64/sve/struct_vect_18.c: Allow branches to

gcc/testsuite/g++.dg/cpp0x/variadic177.C

+// PR c++/71548
+// { dg-do compile { target c++11 } }
+
+template<typename> class fl {};
+template<typename = void, template<class...> class = fl>
+struct S {};
+template<typename... T>
+void f(S<T...> ) {}
+void lol() {
+    S<> s;
+    f(s); // { dg-error "no matching function for call to" }
+}