re PR c++/60185 (ICE with invalid default parameter)

	PR c++/60185
	* parser.c (cp_parser_default_argument): Clear
	current_class_ptr/current_class_ref like tsubst_default_argument.

From-SVN: r208029

gcc/cp/ChangeLog

 2014-02-21  Jason Merrill  <jason@redhat.com>
 
+	PR c++/60185
+	* parser.c (cp_parser_default_argument): Clear
+	current_class_ptr/current_class_ref like tsubst_default_argument.
+
 	PR c++/60252
 	* lambda.c (maybe_resolve_dummy): Check lambda_function rather
 	than current_binding_level.

gcc/cp/parser.c

@@ -18633,8 +18633,24 @@ cp_parser_default_argument (cp_parser *parser, bool template_parm_p)
   /* Parse the assignment-expression.  */
   if (template_parm_p)
     push_deferring_access_checks (dk_no_deferred);
+  tree saved_class_ptr = NULL_TREE;
+  tree saved_class_ref = NULL_TREE;
+  /* The "this" pointer is not valid in a default argument.  */
+  if (cfun)
+    {
+      saved_class_ptr = current_class_ptr;
+      cp_function_chain->x_current_class_ptr = NULL_TREE;
+      saved_class_ref = current_class_ref;
+      cp_function_chain->x_current_class_ref = NULL_TREE;
+    }
   default_argument
     = cp_parser_initializer (parser, &is_direct_init, &non_constant_p);
+  /* Restore the "this" pointer.  */
+  if (cfun)
+    {
+      cp_function_chain->x_current_class_ptr = saved_class_ptr;
+      cp_function_chain->x_current_class_ref = saved_class_ref;
+    }
   if (BRACE_ENCLOSED_INITIALIZER_P (default_argument))
     maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
   if (template_parm_p)

gcc/testsuite/g++.dg/overload/defarg5.C

@@ -2,6 +2,6 @@
 
 struct A
 {
-  int i;
-  A() { void foo(int=i); }	// { dg-error "this" }
+  int i;			// { dg-message "" }
+  A() { void foo(int=i); }	// { dg-error "" }
 };

gcc/testsuite/g++.dg/template/defarg17.C

+// PR c++/60185
+
+template<int> struct A
+{
+  int i;			// { dg-message "" }
+  A() { void foo(int=i); }	// { dg-error "" }
+};
+
+A<0> a;