rebar/rebar3 — pull request #44 by ferd (2014-12-06 16:31:26+00:00)
Title: Partial fix to circular deps (#40)

- Adding tests
- fixing use of set fetching to find repeated deps and prevent infinite
loops

On a circular loop rebar3 now fails with `{error, no_sort}`, which is
uncaught and should be handled to consider the issue fully fixed.