anchor.diff:  
   start_xref_server(Server, Mode) ->
       Root = code:root_dir(),
  -    xref:start(Server),
  -    xref:set_default(Server, [{xref_mode,Mode},
  -                              {verbose,false},
  +    xref:start(Server, [{xref_mode,Mode}]),
  +    xref:set_default(Server, [{verbose,false},
                                 {warnings,false},
                                 {builtins,true}]),
       {ok,_Relname} = xref:add_release(Server, Root, {name,otp}),
  
positive.code:     %% Verify that (at least) OTP application runtime dependencies found
      %% by xref are listed in the runtime_dependencies field of the .app file
      %% of each application.
      Server = proplists:get_value(xref_server, Config),
      {ok, AE} = xref:q(Server, "AE"),
      SAE = lists:keysort(1, AE),
      put(ignored_failures, []),
  
negative.code: -export([undefined_functions/1,deprecated_not_in_obsolete/1,
           obsolete_but_not_deprecated/1,call_to_deprecated/1,
           call_to_size_1/1,call_to_now_0/1,strong_components/1,
           erl_file_encoding/1,xml_file_encoding/1,
           runtime_dependencies_functions/1,
           runtime_dependencies_modules/1]).
  
  -include_lib("common_test/include/ct.hrl").
  
  