Traceback (most recent call last):
  File "/usr/bin/emerge", line 32, in <module>
    from _emerge.main import emerge_main
  File "/usr/lib/portage/pym/_emerge/main.py", line 39, in <module>
    from _emerge.actions import action_config, action_sync, action_metadata, \
  File "/usr/lib/portage/pym/_emerge/actions.py", line 52, in <module>
    from _emerge.depgraph import backtrack_depgraph, depgraph, resume_depgraph
  File "/usr/lib/portage/pym/_emerge/depgraph.py", line 25, in <module>
    from portage.package.ebuild.getmaskingstatus import \
  File "/usr/lib/portage/pym/portage/package/ebuild/getmaskingstatus.py", line 12, in <module>
    from portage.package.ebuild.config import config
  File "/usr/lib/portage/pym/portage/package/ebuild/config.py", line 35, in <module>
    from portage.dbapi.vartree import vartree
ValueError: bad marshal data (unknown type code)