rspec/rspec-core — pull request #1117 by xaviershay (2013-10-19 16:41:56+00:00)
Title: Fail build if any warnings are introduced.

If this proves to work, we should move to rspec-support and use on all
project specs and features (potentially exposing it as a public API?).

@myronmarston thoughts?It's kind of dirty.