re PR c++/79629 (ICE on invalid code in tsubst_copy, at cp/pt.c:14477)

	PR c++/79629
	* g++.dg/other/error35.C: New test.

From-SVN: r266712

gcc/testsuite/ChangeLog

@@ -37,6 +37,9 @@
 	PR c++/83856
 	* g++.dg/cpp1y/lambda-generic-83856.C: New test.
 
+	PR c++/79629
+	* g++.dg/other/error35.C: New test.
+
 2018-12-01  Jeff Law  <law@redhat.com>
 
 	* gcc.dg/predict-22.c: Update expected output.

gcc/testsuite/g++.dg/other/error35.C

+// PR c++/79629
+// { dg-do compile { target c++14 } }
+// { dg-options "-w" }
+
+template <typename> struct S {
+  enum E : int;
+  constexpr int g() const;
+};
+enum S<char>::E;
+template <typename T> enum S<T>::E : int { b };
+template <typename T>
+constexpr int S<T>::g() const { b; } // { dg-error "not declared" }
+static_assert(S<char>().g() == 1, ""); // { dg-error "" }
+// { dg-message "in .constexpr. expansion of" "" { target *-*-* } .-1 }