anchor.diff:    #concuerror_info{
        after_timeout = AfterTimeout,
        ets_tables = EtsTables,
  +     group_leader = GroupLeader,
        links = Links,
        logger = Logger,
        modules = Modules,
  
positive.code:   {true, NewInfo#concuerror_info{extra = Tid}};
  
  run_built_in(Module, Name, Arity, Args, Info)
    when {Module, Name, Arity} =:= {erlang, put, 2};
         {Module, Name, Arity} =:= {erlang, group_leader, 0} ->
    consistent_replay(Module, Name, Arity, Args, Info);
  
  %% For other built-ins check whether replaying has the same result:
  
negative.code:        report_unknown = ReportUnknown,
         scheduler      = self()
        },
    P = spawn_link(fun() -> process_top_loop(InitialInfo) end),
    true = ets:insert(Processes, ?new_process(P, "P")),
    P.
  