Appears to have broken Jekyll

[sanity]

I modified my Gemfile and did a bundle, but now I'm getting the following error whenever I try to jekyll serve:

/Library/Ruby/Gems/2.0.0/gems/bundler-1.14.5/lib/bundler/rubygems_ext.rb:45:in `full_gem_path': uninitialized constant Bundler::Plugin::API::Source (NameError)
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/specification.rb:1391:in `contains_requirable_file?'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:68:in `block in require'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/specification.rb:823:in `block in each'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/specification.rb:822:in `each'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/specification.rb:822:in `each'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:67:in `find'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:67:in `require'
        from /Library/Ruby/Gems/2.0.0/gems/bundler-1.14.5/lib/bundler/plugin/api/source.rb:2:in `<top (required)>'
        from /Library/Ruby/Gems/2.0.0/gems/bundler-1.14.5/lib/bundler/rubygems_ext.rb:45:in `full_gem_path'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/specification.rb:1391:in `contains_requirable_file?'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:68:in `block in require'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/specification.rb:823:in `block in each'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/specification.rb:822:in `each'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/specification.rb:822:in `each'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:67:in `find'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:67:in `require'
        from /Library/Ruby/Gems/2.0.0/gems/bundler-1.14.5/lib/bundler.rb:12:in `<top (required)>'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:135:in `require'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:135:in `rescue in require'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:144:in `require'
        from /Library/Ruby/Gems/2.0.0/gems/jekyll-3.4.1/lib/jekyll/plugin_manager.rb:34:in `require_from_bundler'
        from /Library/Ruby/Gems/2.0.0/gems/jekyll-3.4.1/exe/jekyll:9:in `<top (required)>'
        from /usr/local/bin/jekyll:23:in `load'
        from /usr/local/bin/jekyll:23:in `<main>'

Any ideas?

[bwillis]

Hmm hard to tell, no specific reference to this gem in here, perhaps (from some quick googling) this could be related rubygems/bundler#5409?