/home/travis/.rvm/rubies/ruby-2.5.3/lib/ruby/site_ruby/2.5.0/rubygems.rb:289:in `find_spec_for_exe': can't find gem bundler (>= 0.a) with executable bundle (Gem::GemNotFoundException)
from /home/travis/.rvm/rubies/ruby-2.5.3/lib/ruby/site_ruby/2.5.0/rubygems.rb:308:in `activate_bin_path'
from /home/travis/.gems/bin/bundle:23:in `<main>'
from /home/travis/.gems/bin/ruby_executable_hooks:24:in `eval'
from /home/travis/.gems/bin/ruby_executable_hooks:24:in `<main>'
The command "bundle install" failed and exited with 1 during .
https://travis-ci.com/github/39alpha/39alpha.github.io/builds/159830526