Today, I had ENOUGH of the damn deprication errors letting folks know that ruby has merged BIGNUM and FIXNUM to Integer, and I went on the hunt for the cure. Mostly, folks have referred to this error as something “upgrading rails will fix” but I use repositories that have active record gems on their own. so without dealing with the pending upgrade of all these repositories to the latest gems, I found you can use the following script in your bash profile to rid yourself of the warnings:
export RUBYOPT="-w0" rspec
the following article helps explain this in the clearest way, which I appreciated.