anchor.diff:              [UnknownMessage,
                gc_mod(State),
                gc_hand(State),
  -             self(), pid_groups:group_and_name_of(self()),
  +             self(), catch pid_groups:group_and_name_of(self()),
                State]),
       State.
   
  
positive.code:                             "    Process: ~p (~p)~n"
                              "    Handler: ~p:~p/2~n"
                              "    Message: ~.0p~n",
                              [self(), pid_groups:group_and_name_of(self()),
                               gc_mod(State), gc_hand(State), Msg]),
              self() ! {'$gen_component', bp, breakpoint, step,
                        gc_bpstepper(State)},
  
negative.code:              Msg,
               gc_mod(State),
               gc_hand(State),
               self(), catch pid_groups:group_and_name_of(self()),
               erlang:get(test_server_loc),
               State,
               Stacktrace]),
  