pry-byebug doesn't work on travis with ruby 1.9
pry-byebug doesn't work on travis with ruby 1.9

stackbuilders/rack-tracker,ekorneeff/rack-tracker,fabn/rack-tracker,ekorneeff/rack-tracker,stackbuilders/rack-tracker,railslove/rack-tracker,fabn/rack-tracker,railslove/rack-tracker