Hi Michal, Thanks for the detailed report.
> Le 5 janv. 2021 à 15:38, Bartkowiak, Michal (Nokia - PL/Wroclaw) > <michal.bartkow...@nokia.com> a écrit : > > I hope that it would be possible to debug the problem with attached core > file. If not, please let me know and I will try to provide more information > about the grammar (some minimal example) I am using to generate the problem. I have tried to use your core file on my machine, but it did not work. I'm afraid I need a grammar file to track it. Cheers!