Portage broken on my Alpha

[grahn]

Hello,

I need some help, because portage seems to be broken on my Alpha-Monet (ev6). I made a world update recently (portage-2.0.50-r1) This is the error message I get:

root@cosima:/etc # emerge sync
Traceback (most recent call last):
File "/usr/bin/emerge", line 14, in ?
import portage
File "/usr/lib/portage/pym/portage.py", line 6128, in ?
settings.regenerate() # XXX: Regenerate use after we get a vartree -- GLOBAL
File "/usr/lib/portage/pym/portage.py", line 1392, in regenerate
self.configdict["auto"]["USE"]=autouse(db[root]["vartree"],use_cache=use_cache)
File "/usr/lib/portage/pym/portage.py", line 1121, in autouse
myresult=dep_check(mydep,myvartree.dbapi,None,use="no",use_cache=use_cache)
File "/usr/lib/portage/pym/portage.py", line 3309, in dep_check
mylist=flatten(dep_listcleanup(dep_zapdeps(mysplit,mysplit2)))
File "/usr/lib/portage/pym/portage.py", line 3052, in dep_zapdeps
myresult=dep_zapdeps(unreduced[x],reduced[x])
File "/usr/lib/portage/pym/portage.py", line 3038, in dep_zapdeps
elif myportapi.match(x):
AttributeError: 'NoneType' object has no attribute 'match'

Thanks for any piece of advice,

Cheers,

Alex