Reproduction script for: 1.12.0.rc: cannot install omniauth-google-oauth2 0.4.1 using new index

gistfile1.txt

$ mkdir bundle-omniauth-google-oauth2
$ cd bundle-omniauth-google-oauth2/
$ bundle --version
Bundler version 1.11.2
$ bundle init
Writing new Gemfile to /Users/tim/src/bundle-omniauth-google-oauth2/Gemfile
$ bundle inject omniauth-google-oauth2 0.4.1
Fetching gem metadata from https://rubygems.org/..........
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Resolving dependencies...
Added to Gemfile:
  omniauth-google-oauth2 (= 0.4.1)

# With bundler 1.11.2, all is good

$ bundle install --path .bundle/gems
Fetching gem metadata from https://rubygems.org/.........
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Installing multipart-post 2.0.0
Installing hashie 3.4.3
Installing jwt 1.5.3
Installing multi_json 1.11.2
Installing multi_xml 0.5.5
Installing rack 1.6.4
Using bundler 1.11.2
Installing faraday 0.9.2
Installing omniauth 1.3.1
Installing oauth2 1.0.0
Installing omniauth-oauth2 1.4.0
Installing omniauth-google-oauth2 0.4.1
Bundle complete! 1 Gemfile dependency, 12 gems now installed.
Bundled gems are installed into ./.bundle/gems.

$ rm -rf .bundle/gems
$ gem install --pre bundler
Fetching: bundler-1.12.0.rc.gem (100%)
Successfully installed bundler-1.12.0.rc
1 gem installed

# With bundler 1.12.0.rc, it fails by default

$ bundle install --path .bundle/gems
Fetching gem metadata from https://rubygems.org/
Fetching version metadata from https://rubygems.org/
Fetching dependency metadata from https://rubygems.org/
Could not find omniauth-google-oauth2-0.4.1 in any of the sources

# Specifying --full-index makes it pass again

$ bundle install --path .bundle/gems --full-index
Fetching source index from https://rubygems.org/
Installing multipart-post 2.0.0
Installing hashie 3.4.3
Installing jwt 1.5.3
Installing multi_json 1.11.2
Installing multi_xml 0.5.5
Installing rack 1.6.4
Using bundler 1.12.0.rc
Installing faraday 0.9.2
Installing omniauth 1.3.1
Installing oauth2 1.0.0
Installing omniauth-oauth2 1.4.0
Installing omniauth-google-oauth2 0.4.1
Bundle complete! 1 Gemfile dependency, 12 gems now installed.
Bundled gems are installed into ./.bundle/gems.
$ bundle env
Environment

    Bundler   1.12.0.rc
    Rubygems  2.2.2
    Ruby      2.1.5p273 (2014-11-13 revision 48405) [x86_64-darwin14.0]
    GEM_HOME  /Users/tim/.gem/ruby/2.1.5
    GEM_PATH  /Users/tim/.gem/ruby/2.1.5:/Users/tim/.rubies/ruby-2.1.5/lib/ruby/gems/2.1.0
    Git       2.7.2

Bundler settings

    path
      Set for your local app (/Users/tim/src/bundle-omniauth-google-oauth2/.bundle/config): ".bundle/gems"
      Set for the current user (/Users/tim/.bundle/config): ".bundle/gems"
    local.rubocop
      Set for the current user (/Users/tim/.bundle/config): "/Users/tim/src/rubocop"
    disable_shared_gems
      Set for your local app (/Users/tim/src/bundle-omniauth-google-oauth2/.bundle/config): "true"
    orig_path
      Set via BUNDLE_ORIG_PATH: "/Users/tim/.nvm/versions/io.js/v3.0.0/bin:/Users/tim/.gem/ruby/2.1.5/bin:/Users/tim/.rubies/ruby-2.1.5/lib/ruby/gems/2.1.0/bin:/Users/tim/.rubies/ruby-2.1.5/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    orig_gem_path
      Set via BUNDLE_ORIG_GEM_PATH: "/Users/tim/.gem/ruby/2.1.5:/Users/tim/.rubies/ruby-2.1.5/lib/ruby/gems/2.1.0"

Gemfile

    # A sample Gemfile
    source "https://rubygems.org"
    
    # gem "rails"
    
    # Added at 2016-03-15 17:38:36 +1100 by tim:
    gem 'omniauth-google-oauth2', '= 0.4.1'

Gemfile.lock

    GEM
      remote: https://rubygems.org/
      specs:
        faraday (0.9.2)
          multipart-post (>= 1.2, < 3)
        hashie (3.4.3)
        jwt (1.5.3)
        multi_json (1.11.2)
        multi_xml (0.5.5)
        multipart-post (2.0.0)
        oauth2 (1.0.0)
          faraday (>= 0.8, < 0.10)
          jwt (~> 1.0)
          multi_json (~> 1.3)
          multi_xml (~> 0.5)
          rack (~> 1.2)
        omniauth (1.3.1)
          hashie (>= 1.2, < 4)
          rack (>= 1.0, < 3)
        omniauth-google-oauth2 (0.4.1)
          jwt (~> 1.5.2)
          multi_json (~> 1.3)
          omniauth (>= 1.1.1)
          omniauth-oauth2 (>= 1.3.1)
        omniauth-oauth2 (1.4.0)
          oauth2 (~> 1.0)
          omniauth (~> 1.2)
        rack (1.6.4)
    
    PLATFORMS
      ruby
    
    DEPENDENCIES
      omniauth-google-oauth2 (= 0.4.1)
    
    BUNDLED WITH
       1.11.2
$