emerge output

[14:41:04] root@fujitsu /home/peratu # emerge -DNu world
Calculating dependencies... done!

>>> Verifying ebuild manifests

>>> Emerging (1 of 1) sys-kernel/gentoo-sources-3.1.0-r1
[Errno 22] Invalid argument: '/usr/portage/distfiles/.linux-3.1.tar.bz2.portage_lockfile': chown('/usr/portage/distfiles/.linux-3.1.tar.bz2.portage_lockfile', -1, 250)
Cannot chown a lockfile: '/usr/portage/distfiles/.linux-3.1.tar.bz2.portage_lockfile'
Group IDs of current user: 0 1 2 3 4 6 10 11 20 26 27 1006
 * linux-3.1.tar.bz2 RMD160 SHA1 SHA256 size ;-) ...                                                                                                                                                                     [ ok ]
Traceback (most recent call last):
  File "/usr/lib64/portage/pym/_emerge/EbuildFetcher.py", line 186, in _spawn
    allow_missing_digests=allow_missing):
  File "/usr/lib64/portage/pym/portage/package/ebuild/fetch.py", line 653, in fetch
    stat_cached=mystat)
  File "/usr/lib64/portage/pym/portage/util/__init__.py", line 1078, in apply_secpass_permissions
    stat_cached=stat_cached, follow_links=follow_links)
  File "/usr/lib64/portage/pym/portage/util/__init__.py", line 908, in apply_permissions
    os.chown(filename, uid, gid)
  File "/usr/lib64/portage/pym/portage/__init__.py", line 215, in __call__
    rval = self._func(*wrapped_args, **wrapped_kwargs)
OSError: [Errno 22] Invalid argument: '/usr/portage/distfiles/linux-3.1.tar.bz2'
 * Fetch failed for 'sys-kernel/gentoo-sources-3.1.0-r1', Log file:
 *  '/var/tmp/portage/sys-kernel/gentoo-sources-3.1.0-r1/temp/build.log'

>>> Failed to emerge sys-kernel/gentoo-sources-3.1.0-r1, Log file:

>>>  '/var/tmp/portage/sys-kernel/gentoo-sources-3.1.0-r1/temp/build.log'

 * Messages for package sys-kernel/gentoo-sources-3.1.0-r1:

 * Fetch failed for 'sys-kernel/gentoo-sources-3.1.0-r1', Log file:
 *  '/var/tmp/portage/sys-kernel/gentoo-sources-3.1.0-r1/temp/build.log'
[15:42:06] root@fujitsu /home/peratu #