Something's wrong with my gems

Everytime I run gem install something , I get

Successfully installed bundle-0.0.1
ERROR:  While executing gem ... (NoMethodError)
    undefined method `source_paths' for #<Gem::Specification:0x6ab2aec bundle-0.0.1>

I tried to reinstall gem, tried to reinstall bundle/bundler - no help. When I try rails new blog, I get

An error occurred while installing sqlite3 (1.3.13), and Bundler cannot
continue.
Make sure that `gem install sqlite3 -v '1.3.13'` succeeds before bundling.

In Gemfile:
  sqlite3
         run  bundle exec spring binstub --all
Could not find gem 'sqlite3' in any of the gem sources listed in your Gemfile.

What can I do to solve this?