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.

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