re PR c++/58466 (ICE in cxx_eval_constant_expression)

/cp
2013-10-18  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58466
	* pt.c (most_specialized_class): Bump processing_template_decl for
	get_class_bindings.

/testsuite
2013-10-18  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58466
	* g++.dg/cpp0x/variadic145.C: New.

From-SVN: r203836

gcc/cp/ChangeLog

 2013-10-18  Paolo Carlini  <paolo.carlini@oracle.com>
 
+	PR c++/58466
+	* pt.c (most_specialized_class): Bump processing_template_decl for
+	get_class_bindings.
+
+2013-10-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
 	* parser.c (cp_parser_lookup_name): Tidy.
 
 2013-10-17  Andrew MacLeod  <amacleod@redhat.com>

gcc/cp/pt.c

@@ -18615,10 +18615,15 @@ most_specialized_class (tree type, tree tmpl, tsubst_flags_t complain)
       if (spec_tmpl == error_mark_node)
 	return error_mark_node;
 
+      ++processing_template_decl;
+
       tree parms = DECL_INNERMOST_TEMPLATE_PARMS (spec_tmpl);
       spec_args = get_class_bindings (tmpl, parms,
 				      partial_spec_args,
 				      args);
+
+      --processing_template_decl;
+
       if (spec_args)
 	{
 	  if (outer_args)

gcc/testsuite/ChangeLog

+2013-10-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/58466
+	* g++.dg/cpp0x/variadic145.C: New.
+
 2013-10-18  Andrew MacLeod  <amacleod@redhat.com>
 
 	* g++.dg/plugin/header_plugin.c: Don't include tree-flow.h.

gcc/testsuite/g++.dg/cpp0x/variadic145.C

+// PR c++/58466
+// { dg-do compile { target c++11 } }
+
+template<char, char...> struct A;
+
+template<typename> struct B;
+
+template<char... C> struct B<A<C...>> {};
+
+B<A<'X'>> b;        // { dg-error "incomplete type" }