string index out of buffer with tab-completion on :

[Narrat]

Hi

I experience the following error. In the curses interface I enter : to get into the command mode Instead of typing something I use tab for completion. Visually nothing happens but upon pressing return (doesn't matter if : without following anything or a command entered like :list) an error window will pop up

Installed versions canto-curses 0.9.6-3 canto-next-git 0.9.5.r7.gb1defec-1