https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71481
--- Comment #5 from Bernd Edlinger <bernd.edlinger at hotmail dot de> --- this seems to fix it: Index: input.c =================================================================== --- input.c (Revision 237323) +++ input.c (Arbeitskopie) @@ -1210,7 +1210,7 @@ static void test_builtins () { - assert_loceq ("<built-in>", 0, 0, BUILTINS_LOCATION); + assert_loceq (_("<built-in>"), 0, 0, BUILTINS_LOCATION); ASSERT_PRED1 (is_location_from_builtin_token, BUILTINS_LOCATION); }