Dejavu Serif Condensed Italic (lgc) files have bad metadata, causing fontconfig to think they are "Condensed" only, and inducing font selectors in error
I would say that this is the same issue as described in Bug# 15149.
It would be great to fix this, as it renders Dejavu Serif Condensed pretty much unusable for Mac users.
Indeed, this is a duplicate of bug #15149.
*** This bug has been marked as a duplicate of bug 15149 ***