Add rbtrace to Gemfilesh-include-rbtrace

This will be enabled if ENABLE_RBTRACE environment variable is defined.
This will allow us to debug all sorts of issues in production:

https://github.com/tmm1/rbtrace

1 files changed, 1 insertions, 0 deletions

diff --git a/Gemfile b/Gemfile
index 47815f230d3..a7bf5c500ca 100644
--- a/Gemfile
+++ b/Gemfile
@@ -400,6 +400,7 @@ gem 'email_reply_trimmer', '~> 0.1'
 gem 'html2text'
 
 gem 'ruby-prof', '~> 0.17.0'
+gem 'rbtrace', '~> 0.4', require: false
 
 # OAuth
 gem 'oauth2', '~> 1.4'