Fix test crashes I just introduced.

src/jsregexp.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1652 matching lines @@
   node->AddSibling(sibling);
   return sibling;
 }
 
 
 RegExpNode* ActionNode::PropagateInterest(NodeInfo* info) {
   RegExpNode* sibling = GetSibling(info);
   if (sibling != NULL) return sibling;
   EnsureSiblings();
   ActionNode* action = new ActionNode(*this);
-  action->set_on_success(action->on_success()->PropagateInterest(info));
   action->info()->AdoptInterests(info);
   AddSibling(action);
+  action->set_on_success(action->on_success()->PropagateInterest(info));
   return action;
 }
 
 
 RegExpNode* ChoiceNode::PropagateInterest(NodeInfo* info) {
   RegExpNode* sibling = GetSibling(info);
   if (sibling != NULL) return sibling;
   EnsureSiblings();
   ChoiceNode* choice = new ChoiceNode(*this);
+  choice->info()->AdoptInterests(info);
+  AddSibling(choice);
   ZoneList<GuardedAlternative>* old_alternatives = alternatives();
   int count = old_alternatives->length();
   choice->alternatives_ = new ZoneList<GuardedAlternative>(count);
   for (int i = 0; i < count; i++) {
     GuardedAlternative alternative = old_alternatives->at(i);
     alternative.set_node(alternative.node()->PropagateInterest(info));
     choice->alternatives()->Add(alternative);
   }
-  choice->info()->AdoptInterests(info);
-  AddSibling(choice);
   return choice;
 }
 
 
 RegExpNode* EndNode::PropagateInterest(NodeInfo* info) {
   return PropagateToEndpoint(this, info);
 }
 
 
 RegExpNode* BackreferenceNode::PropagateInterest(NodeInfo* info) {
@@ skipping 360 matching lines @@
 }
 
 RegExpMacroAssembler::RegExpMacroAssembler() {
 }
 
 RegExpMacroAssembler::~RegExpMacroAssembler() {
 }
 
 
 }}  // namespace v8::internal