I found a really nasty issue that affects people running on Heroku’s cedar stack. We are using Rails 3.1.rc5, pg 11, omniauth 2.6. Ruby is 188.8.131.52p
Basically there is an incompatibility between the http, pg and OpenSSL modules which segfaults when making https calls, for example to log in through twitter. Now pg is a required gem when using Heroku cedar stack so leaving that one out is not an option. What fixed this was to add the following to my config.ru at the top:
This ensures that pg is required before openssl and all is good now.
Hope this helps others in similar situations.