PR c++/79500 - ICE with non-template deduction guide

	* pt.c (do_class_deduction): Use STRIP_TEMPLATE rather than
	DECL_TEMPLATE_RESULT.

From-SVN: r245588

gcc/cp/ChangeLog

 2017-02-19  Jason Merrill  <jason@redhat.com>
 
+	PR c++/79500 - ICE with non-template deduction guide
+	* pt.c (do_class_deduction): Use STRIP_TEMPLATE rather than
+	DECL_TEMPLATE_RESULT.
+
 	PR c++/79580 - ICE with compound literal
 	* parser.c (cp_parser_class_head): If we're in the middle of an
 	expression, use ts_within_enclosing_non_class.

gcc/cp/pt.c

@@ -25118,7 +25118,7 @@ do_class_deduction (tree ptype, tree tmpl, tree init, int flags,
     {
       tree t = cands;
       for (; t; t = OVL_NEXT (t))
-	if (DECL_NONCONVERTING_P (DECL_TEMPLATE_RESULT (OVL_CURRENT (t))))
+	if (DECL_NONCONVERTING_P (STRIP_TEMPLATE (OVL_CURRENT (t))))
 	  break;
       if (t)
 	{
@@ -25126,7 +25126,7 @@ do_class_deduction (tree ptype, tree tmpl, tree init, int flags,
 	  for (t = cands; t; t = OVL_NEXT (t))
 	    {
 	      tree f = OVL_CURRENT (t);
-	      if (!DECL_NONCONVERTING_P (DECL_TEMPLATE_RESULT (f)))
+	      if (!DECL_NONCONVERTING_P (STRIP_TEMPLATE (f)))
 		pruned = build_overload (f, pruned);
 	    }
 	  cands = pruned;

gcc/testsuite/g++.dg/cpp1z/class-deduction29.C

+// PR c++/79500
+// { dg-options -std=c++1z }
+
+template<typename T> struct A {};
+A(...) -> A<int>;
+A a = {};