anchor.diff:  		     t_sequential_tracer();
   		   ['trace_control_word'] ->
   		     t_integer();
  +		   ['scheduler_wall_time'] ->
  +		     t_boolean();
   		   List when is_list(List) ->
   		     T_system_flag_2;
   		   unknown ->
  
positive.code: 	  t_atom('trace_control_word'),
  	  %% 'internal_cpu_topology' is an undocumented internal feature.
  	  t_atom('internal_cpu_topology'),
  	  t_integer()]),
     t_sup([t_integer(),
  	  %% 'cpu_topology'
  
negative.code: 	  %% The following two are for 'multi_scheduling'
  	  t_atom('block'),
  	  t_atom('unblock'),
  	  %% For 'scheduler_wall_time'
  	  t_atom('true'),
  	  t_atom('false'),
  	  %% The following is for 'internal_cpu_topology'
  	  t_internal_cpu_topology()])];
  arg_types(erlang, system_info, 1) ->
  