ExceptionsController#show as JS triggers undefined method `map' for nil:NilClass
Started GET "/static/shims.js" for 127.0.0.1 at 2017-08-14 08:28:49 +0000
Processing by ExceptionsController#show as JS
Parameters: {"context_id"=>"static", "id"=>"shims"}
Rescuing from ErrorNotFound.
Completed 500 Internal Server Error in 1ms (ActiveRecord: 0.0ms)
NoMethodError (undefined method `map' for nil:NilClass):
app/controllers/common/application/rescue_errors.rb:236:in `log_exception'
app/controllers/common/application/rescue_errors.rb:227:in `render_error_js'
app/controllers/exceptions_controller.rb:16:in `block (2 levels) in show'
app/controllers/exceptions_controller.rb:10:in `show'
app/controllers/dispatch_controller.rb:15:in `dispatch'