Some time between JRuby 1.7.13 and 1.7.15, they made some changes related to how they expand file paths. This caused some breakage for bundler when a Gemfile tries to use ':path':
This causes a problem for us because Puppet's Gemfile has lines like this and we load Puppet's Gemfile during our spec tests.
We're filing a workaround patch for Puppet's Gemfile that will allow us to use an environment variable to modify the behavior (will link that ticket to this ticket). However, once there is an upstream JRuby fix, we should revert that from the puppet gem file.