whereis_control_flow4.erl:18: The call erlang:register('maria',Pid1::pid()) might fail due to a possible race condition caused by its combination with the erlang:whereis('maria') call in whereis_control_flow4.erl on line 8
whereis_control_flow4.erl:19: The call erlang:register('kostis',Pid2::pid()) might fail due to a possible race condition caused by its combination with the erlang:whereis('kostis') call in whereis_control_flow4.erl on line 13