Thank you all. I solved the problem. Has connected Geany repositories for developers. https://launchpad.net/~geany-dev/+archive/ubuntu/ppa ``` sudo add-apt-repository ppa: geany-dev / ppa sudo apt-get update ``` Installed (updated) package Geany: `sudo apt-get install geany` Everything is working.I enabled code autocompletion. Now program no crashes.