pmerge -eav -s world
 * Resolving...
!!! resolution failed
Traceback (most recent call last):
  File "/usr/bin/pmerge", line 36, in ?
    commandline.main(subcommands)
  File "/usr/lib64/python2.4/site-packages/pkgcore/util/commandline.py", line 401, in main
    exitstatus = main_func(options, out, err)
  File "/usr/lib64/python2.4/site-packages/pkgcore/scripts/pmerge.py", line 403, in main
    just_failures = reduce_to_failures(ret[1])
  File "/usr/lib64/python2.4/site-packages/pkgcore/resolver/util.py", line 31, in reduce_to_failures
    if frame.succeeded:
AttributeError: 'tuple' object has no attribute 'succeeded'