Webmock gem をインストールしましたが、rspec テストが機能しなくなり、代わりに次のエラーが発生しました: (自動テストにガードを使用しています)
/home/neilmarion/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.4/lib/bundler/spec_set.rb:90:in `block in materialize': Could not find crack-0.3.2 in any of the sources (Bundler::GemNotFound)
from /home/neilmarion/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.4/lib/bundler/spec_set.rb:83:in `map!'
from /home/neilmarion/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.4/lib/bundler/spec_set.rb:83:in `materialize'
from /home/neilmarion/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.4/lib/bundler/definition.rb:127:in `specs'
from /home/neilmarion/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.4/lib/bundler/environment.rb:27:in `specs'
from /home/neilmarion/.rvm/gems/ruby-1.9.3-p194@global/gems/rubygems-bundler-1.0.2/lib/rubygems-bundler/noexec.rb:41:in `candidate?'
from /home/neilmarion/.rvm/gems/ruby-1.9.3-p194@global/gems/rubygems-bundler-1.0.2/lib/rubygems-bundler/noexec.rb:60:in `setup'
from /home/neilmarion/.rvm/gems/ruby-1.9.3-p194@global/gems/rubygems-bundler-1.0.2/lib/rubygems-bundler/noexec.rb:75:in `<top (required)>'
from /home/neilmarion/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `require'
from /home/neilmarion/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
from /home/neilmarion/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
from /home/neilmarion/.rvm/gems/ruby-1.9.3-p194@global/bin/ruby_noexec_wrapper:9:in `<main>'
クラッキング 0.3.2 がすでに gem リストにあることがわかります。何が悪いのかわからない。