Funny that you mention it...
I hadn't done much coding for a while.. a week ago I tried this plug-in again. As I recall, geany froze (or crashed) when I hit step.
I tried again after reading your comment. I couldn't reproduce the crash.
I'm using Debian 9.
@andreygursky "Debugger", gdb selected.
I'll use the plug-in more often now in the future. If I can reproduce the problem, I'll be sure to document right away.
Thanks again for geany.