Upgrade to Jruby1.7.20.1 beaks my project build

[Sathwik B P]

Hi,

Project Gemfile looks like this. I was using Jruby 1.7.19. It had installed buildr version 1.4.22

source 'https://rubygems.org'

gem 'buildr', '>= 1.4.22'

# rspec dependencies for check()
gem 'rspec-expectations',   '= 2.14.3'
gem 'rspec-mocks',          '= 2.14.3'
gem 'rspec-core',           '= 2.14.5'
gem 'rspec',                '= 2.14.1'


I upgraded to Jruby 1.7.20.1 the latest release.
bundle install (upgraded buildr to 1.4.23)

Now when I execute on my Project

~/apps/jruby-1.7.20.1/bin/jruby -J-XX:MaxPermSize=512m -S buildr clean package test=no

Gem::LoadError: You have already activated buildr 1.4.23, but your Gemfile requires buildr 1.4.22. Prepending `bundle exec` to your command may solve this.
    setup at /home/sathwik/apps/jruby-1.7.20.1/lib/ruby/gems/shared/gems/bundler-1.10.5/lib/bundler/runtime.rb:34
     each at org/jruby/RubyArray.java:1613
     each at /home/sathwik/apps/jruby-1.7.20.1/lib/ruby/1.9/forwardable.rb:201
    setup at /home/sathwik/apps/jruby-1.7.20.1/lib/ruby/gems/shared/gems/bundler-1.10.5/lib/bundler/runtime.rb:19
    setup at /home/sathwik/apps/jruby-1.7.20.1/lib/ruby/gems/shared/gems/bundler-1.10.5/lib/bundler.rb:127
   (root) at /home/sathwik/apps/jruby-1.7.20.1/lib/ruby/gems/shared/gems/bundler-1.10.5/lib/bundler/setup.rb:8
  require at org/jruby/RubyKernel.java:1072
   (root) at /home/sathwik/apps/jruby-1.7.20.1/lib/ruby/shared/rubygems/core_ext/kernel_require.rb:1
  require at /home/sathwik/apps/jruby-1.7.20.1/lib/ruby/shared/rubygems/core_ext/kernel_require.rb:54
     load at org/jruby/RubyKernel.java:1091
   (root) at /home/sathwik/apps/jruby-1.7.20.1/bin/buildr:23

I could only get this working by,

Remove existing Gemfile.lock
bundle install

buildr clean package test=no

Question is, do we need to delete Gemfile.lock and execute bundle install everytime on my project when we upgrade Jruby?