puppetlabs/puppetlabs-concat — pull request #68 by totally (2013-09-14 19:49:06+00:00)
Title: *manifests/fragment.pp - including concat::setup.  

${concat::setup::variables} were not visible within the manifests/fragment.pp scope. This caused $fragdir not to be set within concat::fragments, and so fragments were attempting to be created in /.

By including concat::setup, these variables are visible.