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I get this when I run emerge --sync right after a fresh untaring of the base Gentoo system and chrooting into the environment

>>> Updating Portage cache:
Traceback (most recent call last):
  file "/usr/bin/emerge", line 3004, in ?
    conf = portage.config(config_profile_path=portage.settings.profile_path[:], \
TypeError: unsubscriptable object

Thanks,
   Don