As a result of http://trac.webkit.org/changeset/51608, the newly checked in baseline pushes the boundaries of sanity:
We should either remove this test if it no longer makes sense or treat this as a regression and fix it.
Hah, that is hilarious!
In any case, the LayoutTests/fast/css/variables directory was removed in:
I'm going to mark this as invalid now. Reopen if you disagree.