anchor.diff:      [].
   
   guard(_Config) ->
  -    Tuple = id({a,b}),
  +    _Tuple = id({a,b}),
       ok = guard_1(<<1,2,3>>, {1,2,3}),
       ok = guard_2(<<42>>, #{}),
       ok.
  
positive.code: first_after(Data, Offset) ->
      case byte_size(Data) > Offset of
  	false ->
  	    {First, Rest} = {ok, ok},
  	    ok;
  	true ->
  	    <<_:Offset/binary, Rest/binary>> = Data,
  
negative.code:         {this_hdr = 17,
           ext_hdr_opts}).
  
  get_payload(_Config) ->
      <<3445:48>> = do_get_payload(#ext_header{ext_hdr_opts = <<3445:48>>}),
      {'EXIT',_} = (catch do_get_payload(#ext_header{})),
      ok.
  