Nothing happen

Hi, I tried cloned it and execute as instructed

$ pwd
/home/robbi/workplace/bash/google-group-crawler

$ export _GROUP="debmal"

$ ./crawler.sh -sh

$ ./crawler.sh -sh > curl.sh

$ /usr/bin/bash +x curl.sh

but nothing happen, inside debmal threads, mbox also empty. Maybe my steps are wrong or maybe regex on script are broken. Could you have a look on it?

Thanks for the great works!