anchor.diff:  	t_list_comprehension/1,
   	t_map_sort_literals/1,
   	t_map_size/1,
  +	t_build_and_match_aliasing/1,
   
   	%% warnings
   	t_warn_useless_build/1,
  
positive.code:     {'EXIT',{{badmatch,_},_}} = (catch (#{x:=3} = id(#{x=>"three"}))),
      ok.
  
  
  t_map_size(Config) when is_list(Config) ->
      0 = map_size(id(#{})),
  
negative.code: 	t_guard_bifs, t_guard_sequence, t_guard_update,
  	t_guard_receive,t_guard_fun, t_list_comprehension,
  	t_map_sort_literals,
  	t_map_size,
  	t_build_and_match_aliasing,
  
  	%% warnings
  	t_warn_useless_build,
  