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:              Msg,
               gc_mod(State),
               gc_hand(State),
               self(), pid_groups:group_and_name_of(self()),
               erlang:get(test_server_loc),
               State,
               Stacktrace]),
  
negative.code: 
  -spec bp_step(pid()) -> {module(), On::atom(), comm:message()}.
  bp_step(Pid) ->
      ?TRACE_BP_STEPS("Do step ~p ~p~n", [Pid, catch pid_groups:group_and_name_of(Pid)]),
      Pid !  {'$gen_component', bp, breakpoint, step, self()},
      receive {'$gen_component', bp, breakpoint, step_done,
               _GCPid, Module, On, Msg} ->
  