code: def internal_error (out=stderr, etype=None, evalue=None, tb=None):
      
      print(os.linesep, file=out)
      print(_("""********** Oops, I did it again. *************
  
  You have found an internal error in LinkChecker. Please write a bug report
  at %s
  and include the following information:
  - the URL or file you are testing
  - the system information below
  
  When using the commandline client:
  - your commandline arguments and any custom configuration files.
  - the output of a debug run with option "-Dall"
  
  Not disclosing some of the information above due to privacy reasons is ok.
  I will try to help you nonetheless, but you have to give me something
  I can work with ;) .
  """) % configuration.SupportUrl, file=out)
      if etype is None:
          etype = sys.exc_info()[0]
      if evalue is None:
          evalue = sys.exc_info()[1]
      if tb is None:
          tb = sys.exc_info()[2]
      better_exchook2.better_exchook(etype, evalue, tb, out=out)
      print_app_info(out=out)
      print_proxy_info(out=out)
      print_locale_info(out=out)
      print(os.linesep,
        _("******** LinkChecker internal error, over and out ********"), file=out)
docs: Print internal error message (output defaults to stderr).