ExceptionNotification gem will only show application backtrace starting on Rails 4

Starting with Rails 4.0, when you get an exception reported via the ExceptionNotification gem, you will only see a very short backtrace with all backtrace lines from gems or ruby libraries missing.

This happens, because the ExceptionNotification gem uses Rails' default backtrace cleaner. To get a full backtrace in exception emails, you can remove the comment from this line in config/initializers/backtrace_silencers.rb:

CopyRails.backtrace_cleaner.remove_silencers!

Note that this will break the "Application Trace" functionality on default Rails error pages, i.e. you will always see the full trace an no longer be able to filter out any lines from gems.

Better errors Show archive.org snapshot is not affected.