redmine/config/initializers/backtrace_silencers.rb

# Be sure to restart your server when you modify this file.

# You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
# Rails.backtrace_cleaner.add_silencer { |line| line =~ /my_noisy_library/ }

# You can also remove all the silencers if you're trying do debug a problem that might steem from framework code.
# Rails.backtrace_cleaner.remove_silencers!

# Do not remove plugins backtrace
Rails.backtrace_cleaner.remove_silencers!
Rails.backtrace_cleaner.add_silencer { |line| line !~ /^\/?(app|config|lib|plugins|test)/ }