emerge portage
Calculating dependencies... done!
>>> Verifying ebuild Manifests...

>>> Emerging (1 of 1) sys-apps/portage-2.1.3.19 to /
 * portage-2.1.3.16.tar.bz2 RMD160 ;-) ...                                [ ok ]
 * portage-2.1.3.16.tar.bz2 SHA1 ;-) ...                                  [ ok ]
 * portage-2.1.3.16.tar.bz2 SHA256 ;-) ...                                [ ok ]
 * portage-2.1.3.16.tar.bz2 size ;-) ...                                  [ ok ]
>>> Resuming download...
>>> Downloading 'http://mirror.utdlug.org/linux/distributions/gentoo/distfiles/portage-2.1.3.19.patch.bz2'
--18:52:57--  http://mirror.utdlug.org/linux/distributions/gentoo/distfiles/portage-2.1.3.19.patch.bz2
           => `/usr/portage/distfiles/portage-2.1.3.19.patch.bz2'
Resolving mirror.utdlug.org... 216.40.33.251, 216.40.33.31
Connecting to mirror.utdlug.org|216.40.33.251|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 653 [text/html]

52% [==================>                  ] 653           --.--K/s

18:52:57 (36.20 MB/s) - `/usr/portage/distfiles/portage-2.1.3.19.patch.bz2' saved [653/653]

 * checking ebuild checksums ;-) ...                                      [ ok ]
 * checking auxfile checksums ;-) ...                                     [ ok ]
 * checking miscfile checksums ;-) ...                                    [ ok ]
 * checking portage-2.1.3.16.tar.bz2 ;-) ...                              [ ok ]
 * checking portage-2.1.3.19.patch.bz2 ;-) ...                            [ !! ]

!!! Digest verification failed:
!!! /usr/portage/distfiles/portage-2.1.3.19.patch.bz2
!!! Reason: Filesize does not match recorded size
!!! Got: 653
!!! Expected: 20196