re PR c++/84630 (ICE: TYPE_NAME() used on error_mark_node in tsubst_lambda_expr, at cp/pt.c:17141)

/cp
2018-04-18  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84630
	* pt.c (tsubst_lambda_expr): Check begin_lambda_type return value
	for error_mark_node.

/testsuite
2018-04-18  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84630
	* g++.dg/cpp0x/pr84630.C: New.

From-SVN: r259460

gcc/cp/ChangeLog

+2018-04-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/84630
+	* pt.c (tsubst_lambda_expr): Check begin_lambda_type return value
+	for error_mark_node.
+
 2018-04-18  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/84463

gcc/cp/pt.c

@@ -17570,6 +17570,8 @@ tsubst_lambda_expr (tree t, tree args, tsubst_flags_t complain, tree in_decl)
     }
 
   tree type = begin_lambda_type (r);
+  if (type == error_mark_node)
+    return error_mark_node;
 
   /* Do this again now that LAMBDA_EXPR_EXTRA_SCOPE is set.  */
   determine_visibility (TYPE_NAME (type));

gcc/testsuite/ChangeLog

+2018-04-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/84630
+	* g++.dg/cpp0x/pr84630.C: New.
+
 2018-04-18  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/84463

gcc/testsuite/g++.dg/cpp0x/pr84630.C

+// PR c++/84630
+// { dg-do compile { target c++11 } }
+
+template <typename...> struct c {
+  template <int> __attribute__((noinline([] {}))) int b();  // { dg-error "wrong number of arguments" }
+};
+c<> a;