While puma running, I edit the config.rb
, then below was occurred.
[Listen warning]: Change block raise an execption: undefined method `unmount' for nil:NilClass
Backtrace:
***************/.rvm/gems/ruby-2.0.0-p247/gems/middleman-core-3.1.6/lib/middleman-core/preview_server.rb:185:in `unmount_instance'
***************/.rvm/gems/ruby-2.0.0-p247/gems/middleman-core-3.1.6/lib/middleman-core/preview_server.rb:65:in `reload'
***************/.rvm/gems/ruby-2.0.0-p247/gems/middleman-core-3.1.6/lib/middleman-core/preview_server.rb:115:in `block in start_file_watcher'
***************/.rvm/gems/ruby-2.0.0-p247/gems/listen-1.3.1/lib/listen/listener.rb:252:in `call'
***************/.rvm/gems/ruby-2.0.0-p247/gems/listen-1.3.1/lib/listen/listener.rb:252:in `on_change'
***************/.rvm/gems/ruby-2.0.0-p247/gems/listen-1.3.1/lib/listen/listener.rb:290:in `block in initialize_adapter'
***************/.rvm/gems/ruby-2.0.0-p247/gems/listen-1.3.1/lib/listen/adapter.rb:252:in `call'
***************/.rvm/gems/ruby-2.0.0-p247/gems/listen-1.3.1/lib/listen/adapter.rb:252:in `report_changes'
***************/.rvm/gems/ruby-2.0.0-p247/gems/listen-1.3.1/lib/listen/adapter.rb:321:in `poll_changed_directories'
***************/.rvm/gems/ruby-2.0.0-p247/gems/listen-1.3.1/lib/listen/adapter.rb:297:in `block in start_poller'