>>> Original instance of package unmerged safely.
 * In portage-2.1.2, installation actions do not necessarily pull in build time
 * dependencies that are not strictly required.  This behavior is adjustable
 * via the new --with-bdeps option that is documented in the emerge(1) man page.
 * For more information regarding this change, please refer to bug #148870.

 * See NEWS and RELEASE-NOTES for further changes.

 *
 * For help with using portage please consult the Gentoo Handbook
 * at http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=3
 *
>>> sys-apps/portage-2.1.2.7 merged.

>>> No packages selected for removal by clean
>>> Auto-cleaning packages...

 app-portage/portage-utils
    selected: 0.1.21
   protected: 0.1.26
     omitted: none

>>> 'Selected' packages are slated for removal.
>>> 'Protected' and 'omitted' packages will not be removed.

>>> Unmerging app-portage/portage-utils-0.1.21...
!!! CATEGORY file is corrupt: /var/db/pkg/app-portage/portage-utils-0.1.21/CATEG
ORY
Traceback (most recent call last):
  File "/usr/bin/emerge", line 5530, in ?
    retval = emerge_main()
  File "/usr/bin/emerge", line 5525, in emerge_main
    myopts, myaction, myfiles, spinner)
  File "/usr/bin/emerge", line 5002, in action_build
    ldpath_mtimes, autoclean=1)
  File "/usr/bin/emerge", line 3599, in unmerge
    vartree=vartree, ldpath_mtimes=ldpath_mtimes)
  File "/usr/lib/portage/pym/portage.py", line 3967, in unmerge
    ldpath_mtimes=ldpath_mtimes)
  File "/usr/lib/portage/pym/portage.py", line 6964, in unmerge
    self.settings, 0, 0, self.vartree.dbapi)
  File "/usr/lib/portage/pym/portage.py", line 2989, in doebuild_environment
    mysettings.setcpv(mycpv, use_cache=use_cache, mydb=mydbapi)
  File "/usr/lib/portage/pym/portage.py", line 1679, in setcpv
    cp = dep_getkey(mycpv)
  File "/usr/lib/portage/pym/portage_dep.py", line 459, in dep_getkey
    mysplit = catpkgsplit(mydep)
  File "/usr/lib/portage/pym/portage_versions.py", line 290, in catpkgsplit
    raise InvalidData("Invalid category in %s" %mydata )
portage_exception.InvalidData: Invalid category in /portage-utils-0.1.21
localhost etc #