anchor.diff:  suite() -> [{ct_hooks,[ts_install_cth]}].
   
   all() -> 
  -    [erl_bif_types, specs, improper_bif_stubs, auto_imports,
  +    [erl_bif_types, guard_bifs_in_erl_bif_types, 
  +     specs, improper_bif_stubs, auto_imports,
        t_list_to_existing_atom, os_env, otp_7526,
        display,
        atom_to_binary, binary_to_atom, binary_to_existing_atom,
  
positive.code: 			 "(or with bogus return values):\n"),
  	    io:format("~p\n", [BadSmokeTest]),
  	    ?line ?t:fail({length(BadSmokeTest),bad_smoke_test})
      end.
  
  known_types({M,F,A}) ->
  
negative.code:     deeep(N,[hello]).
  
  erl_bif_types(Config) when is_list(Config) ->
      ensure_erl_bif_types_compiled(),
  
      List0 = erlang:system_info(snifs),
  
      %% Ignore missing type information for hipe BIFs.
  