Checking patch sysdeps/mach/_strerror.c...
error: while searching for:

  if (system > err_max_system || ! __mach_error_systems[system].bad_sub)
    {
      __snprintf (buf, buflen, "%s: %d", _("Error in unknown error system: "),
		  errnum);
      return buf;
    }

error: patch failed: sysdeps/mach/_strerror.c:40
Applying patch sysdeps/mach/_strerror.c with 1 reject...
Rejected hunk #1.