re PR c++/68726 (ice: tree check: expected tree_vec, have error_mark in…

re PR c++/68726 (ice: tree check: expected tree_vec, have error_mark in comp_template_args_with_info, at cp/pt.c:7890)

/cp
2016-02-11  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/68726
	* pt.c (lookup_template_class_1): Check tsubst return value for
	error_mark_node.

/testsuite
2016-02-11  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/68726
	* g++.dg/cpp0x/pr68726.C: New.

From-SVN: r233339

gcc/cp/ChangeLog

+2016-02-11  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/68726
+	* pt.c (lookup_template_class_1): Check tsubst return value for
+	error_mark_node.
+
 2016-02-10  Jason Merrill  <jason@redhat.com>
 
 	PR c++/68926

gcc/testsuite/ChangeLog

+2016-02-11  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/68726
+	* g++.dg/cpp0x/pr68726.C: New.
+
 2016-02-11  Ilya Enkovich  <enkovich.gnu@gmail.com>
 
 	* lib/mpx-dg.exp: Fix warning in check_effective_target_mpx

gcc/testsuite/g++.dg/cpp0x/pr68726.C

+// { dg-do compile { target c++11 } }
+
+template <typename> struct A {
+  template <typename, > struct __construct_helper;  // { dg-error "expected" }
+  template <typename... _Args>
+  using __has_construct typename __construct_helper<_Args...>::type;  // { dg-error "expected" }
+} struct : A<int> {  // { dg-error "expected" }