localhost init.d # emerge --sync
Traceback (most recent call last):
  File "/usr/bin/emerge", line 12, in ?
    import portage
  File "/usr/lib/portage/pym/portage.py", line 7235, in ?
    init_legacy_globals()
  File "/usr/lib/portage/pym/portage.py", line 7201, in init_legacy_globals
    mtimedb = load_mtimedb(f)
  File "/usr/lib/portage/pym/portage.py", line 7126, in load_mtimedb
    d = mypickle.load()
cPickle.UnpicklingError: could not find MARK