ansible/ansible — pull request #3920 by herbyg-axial (2013-08-22 19:50:23+00:00)
Title: ec2 inventory: Verify that a security group exists before trying to use ...

...its name as a key in inventory.

The ec2 inventory plugin is automatically assuming that if an instance is missing the security_group attribute, that it must be using an older version of boto. This is not always the case.