tinderbox seems broken after recent commits (python-related?)

[Alexey Dokuchaev]

hi there,

tinderbox is unable to build more-or-less complex ports for couple of days
now; both for 8.4/pkg_tools and 9.3/pkgng: it quietly exits with no package
produced and no logs generated, except build/<build-name>/make.0 that looks
always like this (modulo list of dependent packages, can be longer):

`python27-2.7.8_3.txz' is up to date.
`gettext-0.18.3.1_1.txz' is up to date.
`libiconv-1.14_3.txz' is up to date.
`indexinfo-0.2.txz' is up to date.
make: Graph cycles through `py27-pylib-1.4.20.txz'
make: Graph cycles through `py27-setuptools27-5.5.1.txz'
`pkgconf-0.9.6_1.txz' is up to date.
`pkg-1.3.6.txz' is up to date.

On stable/8, make(1) falls into endless loop, repeating these lines all
over again untill it dies via sig11.

Can it be related to the recent Python framework overhaul?  Any ideas how
to remedy the situation?  Thanks,

./danfe