929    * @param debug should we produce debugging messages as we parse.
 930    */
 931   protected boolean find_recovery_config(boolean debug)
 932     {
 933       Symbol error_token;
 934       int act;
 935 
 936       if (debug) debug_message("# Finding recovery state on stack");
 937 
 938       /* Remember the right-position of the top symbol on the stack */
 939       int right_pos = (stack.peek()).right;
 940       int left_pos  = (stack.peek()).left;
 941 
 942       /* pop down until we can shift under error Symbol */
 943       while (!shift_under_error())
 944         {
 945           /* pop the stack */
 946           if (debug)
 947             debug_message("# Pop stack by one, state was # " +
 948                           (stack.peek()).parse_state);
 949           left_pos = ((Symbol)stack.pop()).left;
 950           tos--;
 951 
 952           /* if we have hit bottom, we fail */
 953           if (stack.empty())
 954             {
 955               if (debug) debug_message("# No recovery state found on stack");
 956               return false;
 957             }
 958         }
 959 
 960       /* state on top of the stack can shift under error, find the shift */
 961       act = get_action((stack.peek()).parse_state, error_sym());
 962       if (debug)
 963         {
 964           debug_message("# Recover state found (#" +
 965                         (stack.peek()).parse_state + ")");
 966           debug_message("# Shifting on error to state #" + (act-1));
 967         }
 968 
 969       /* build and shift a special error Symbol */

 929    * @param debug should we produce debugging messages as we parse.
 930    */
 931   protected boolean find_recovery_config(boolean debug)
 932     {
 933       Symbol error_token;
 934       int act;
 935 
 936       if (debug) debug_message("# Finding recovery state on stack");
 937 
 938       /* Remember the right-position of the top symbol on the stack */
 939       int right_pos = (stack.peek()).right;
 940       int left_pos  = (stack.peek()).left;
 941 
 942       /* pop down until we can shift under error Symbol */
 943       while (!shift_under_error())
 944         {
 945           /* pop the stack */
 946           if (debug)
 947             debug_message("# Pop stack by one, state was # " +
 948                           (stack.peek()).parse_state);
 949           left_pos = stack.pop().left;
 950           tos--;
 951 
 952           /* if we have hit bottom, we fail */
 953           if (stack.empty())
 954             {
 955               if (debug) debug_message("# No recovery state found on stack");
 956               return false;
 957             }
 958         }
 959 
 960       /* state on top of the stack can shift under error, find the shift */
 961       act = get_action((stack.peek()).parse_state, error_sym());
 962       if (debug)
 963         {
 964           debug_message("# Recover state found (#" +
 965                         (stack.peek()).parse_state + ")");
 966           debug_message("# Shifting on error to state #" + (act-1));
 967         }
 968 
 969       /* build and shift a special error Symbol */