Getting Error 'block in <top (required)>'

[saurabhsharma722]

I am using Ubuntu, I did all required configuration, still getting Error while running 'rake deathweight'

Error :-

WARN -- : ** [Bugsnag] No API key configured, couldn't notify
rake aborted!
EOFError: end of file reached
/home/saurabh/.rvm/gems/ruby-2.2.0-preview1@luxola/gems/deadweight-0.2.2/lib/deadweight.rb:161:in fetch' /home/saurabh/.rvm/gems/ruby-2.2.0-preview1@luxola/gems/deadweight-0.2.2/lib/deadweight.rb:72:inblock in reset!'
/home/saurabh/.rvm/gems/ruby-2.2.0-preview1@luxola/gems/deadweight-0.2.2/lib/deadweight.rb:71:in each' /home/saurabh/.rvm/gems/ruby-2.2.0-preview1@luxola/gems/deadweight-0.2.2/lib/deadweight.rb:71:inreset!'
/home/saurabh/.rvm/gems/ruby-2.2.0-preview1@luxola/gems/deadweight-0.2.2/lib/deadweight.rb:93:in run' /home/saurabh/luxola/lib/tasks/deadweight.rake:8:inblock in <top (required)>'
/home/saurabh/.rvm/gems/ruby-2.2.0-preview1@luxola/gems/bugsnag-2.7.1/lib/bugsnag/rake.rb:36:in block in bugsnag_define_task' /home/saurabh/.rvm/gems/ruby-2.2.0-preview1@luxola/bin/ruby_executable_hooks:15:ineval'
/home/saurabh/.rvm/gems/ruby-2.2.0-preview1@luxola/bin/ruby_executable_hooks:15:in `

'
Tasks: TOP => deadweight
(See full trace by running task with --trace)