railsware/exception_notification — pull request #1 by kmdsbng (2014-05-27 08:21:55+00:00)
Title: _exception_environment.text.erb raises an exception.

@request.filtered_env may includes both String and Symbol.
Then exception raised and mail didn't sended.

So, I map all of item to String.

I don't know when this problem happens. sorry.