This comes up suddenly, I have not observed this for a while, when I tried to run rake db:migrate And following the server log. Can anyone help me this
rake aborted!
```
NoMethodError: undefined method `split' for nil:NilClass
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/rollbar-2.7.1/lib/rollbar/rake.rb:23:in `patch?'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/rollbar-2.7.1/lib/rollbar/rake.rb:6:in `patch!'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/rollbar-2.7.1/lib/rollbar/rake.rb:38:in `<top (required)>'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `block in require'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in `load_dependency'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `require'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/rollbar-2.7.1/lib/rollbar.rb:790:in `require_hooks'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/rollbar-2.7.1/lib/rollbar.rb:755:in `configure'
/home/gvpmahesh/code/shij/core/config/initializers/rollbar.rb:1:in `<top (required)>'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `load'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `block in load'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in `load_dependency'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `load'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/engine.rb:652:in `block in load_config_initializer'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/notifications.rb:166:in `instrument'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/engine.rb:651:in `load_config_initializer'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/engine.rb:616:in `block (2 levels) in <class:Engine>'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/engine.rb:615:in `each'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/engine.rb:615:in `block in <class:Engine>'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `instance_exec'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `run'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/initializable.rb:55:in `block in run_initializers'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/initializable.rb:44:in `each'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/initializable.rb:44:in `tsort_each_child'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/initializable.rb:54:in `run_initializers'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/application.rb:352:in `initialize!'
/home/gvpmahesh/code/shij/core/config/environment.rb:5:in `<top (required)>'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `block in require'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in `load_dependency'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `require'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/application.rb:328:in `require_environment!'
/home/gvpmahesh/.rvm/gems/ruby-2.2.3/gems/railties-4.2.5/lib/rails/application.rb:457:in `block in run_tasks_blocks'
Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)
```
Is this the problem with the rollbar gem? Where I am going wrong in this.