I\'ve seen very similar problems in other SO questions (e.g. No source for ruby-1.9.2-p321 provided with debugger-ruby_core_source gem) as well as through a Google search, but n
To solve this problem, you need reinstall rails' source code. This command will fix the problem:
$ rvm reinstall 2.0.0 --disable-binary
Then, the command $ bundle install will work.
$ bundle install
Reference: https://pfonseca.com/error-to-install-debugger-s-gem