Hi Torsten, Thanks for your work on swig so far! However, there's #951623 open which has been patched upstream. Could you please take a look and apply the patch (and upload)? If you're busy (or something), I'd be happy to do it myself via an NMU. Once this is done, we'll fix mecab and this would bring us very close to finishing our Ruby2.7 transition. Best, Utkarsh