[Geany-Users] problem using geany.find in lua plugin

I installed geany and geanylua plugin for my ubuntu 12.04 64 bit system from the repository, version seems to be 0.22 most scripts I write work fine but if I try to use geany.find function, geany crashes for instance, just the single line script

x, y= geany.find ("ab",1,4,{"matchcase"})

is a crash on a file with many lines of text in utf-8 encoding, regardless of whether "ab" is present in the specified range just wondering if this is a problem with how I am using the function, I would appreciate some examples of scripts that use find that work on geany 0.22

thanks