An issue that was fixed today in portage was ignoring a missing module called "freebsd", which would later cause a seemingly unrelated error upon installing certain system packages. This would happen after a python upgrade before python-updater is run. The fix will now cause portage to bomb out when it encounters the missing module, alerting the user to actions required.
Because of this, python-updater now should pass FEATURES="ignore-missing-freebsd-module" to emerge in order to bypass the bomb out.
See bug 192341
(note that passing this feature on older portages is harmless)
That revision was reverted.
Yes, other better solutions have been proposed, so canceling this bug for now.