Attempted to update to PCS from Hg

Attempted to update to PCS from Mercurial. Greeted with a bunch of this:

/Users/zach/Documents/workspace/PCS/pcs/bpf/bpf.pyx:391:53: Attempting to index non-array type ''

Error converting Pyrex file to C:
------------------------------------------------------------
...
        li = []
        n = self.bp.bf_len
        if n > 0:
            ip = self.bp.bf_insns
            for 0 <= i < n:
                li.append(op(ip[0].code, ip[0].jt, ip[0].jf, ip[0].k))
                                                              ^
------------------------------------------------------------