sys-process/vixie-cron
    selected: 4.1-r4
   protected: 4.1-r7
     omitted: none

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

>>> Waiting 5 seconds before starting...
>>> (Control-C to abort)...
>>> Unmerging in: 5 4 3 2 1
>>> Unmerging sys-process/vixie-cron-4.1-r4...
No package files given... Grabbing a set.
Traceback (most recent call last):
  File "/usr/bin/emerge", line 3080, in ?
    unmerge("clean", ["world"])
  File "/usr/bin/emerge", line 2188, in unmerge
    retval=portage.unmerge(mysplit[0],mysplit[1],portage.root,mysettings,unmerge_action not in ["clean","prune"])
  File "/usr/lib/portage/pym/portage.py", line 2828, in unmerge
    mylink.unmerge(trimworld=mytrimworld,cleanup=1)
  File "/usr/lib/portage/pym/portage.py", line 6064, in unmerge
    spawn("bzip2 -d "+self.dbdir+"/environment.bz2",self.settings,free=1)
  File "/usr/lib/portage/pym/portage.py", line 1567, in spawn
    return portage_exec.spawn_bash(mystring,env=env,**keywords)
  File "/usr/lib/portage/pym/portage_exec.py", line 46, in spawn_bash
    return spawn(args,env=env,opt_name=opt_name,**keywords)
  File "/usr/lib/portage/pym/portage_exec.py", line 160, in spawn
    raise str(e)+":\n   "+myc+" "+string.join(myargs)
execve() arg 3 contains a non-string value:
   /bin/bash [vixie-cron-4.1-r4] bash -c bzip2 -d /var/db/pkg/sys-process/vixie-cron-4.1-r4/environment.bz2
Traceback (most recent call last):
  File "/usr/bin/emerge", line 3080, in ?
    unmerge("clean", ["world"])
  File "/usr/bin/emerge", line 2188, in unmerge
    retval=portage.unmerge(mysplit[0],mysplit[1],portage.root,mysettings,unmerge_action not in ["clean","prune"])
  File "/usr/lib/portage/pym/portage.py", line 2828, in unmerge
    mylink.unmerge(trimworld=mytrimworld,cleanup=1)
  File "/usr/lib/portage/pym/portage.py", line 6075, in unmerge
    a=doebuild(myebuildpath,"prerm",self.myroot,self.settings,cleanup=cleanup,use_cache=0,tree="vartree")
  File "/usr/lib/portage/pym/portage.py", line 2542, in doebuild
    return spawn(EBUILD_SH_BINARY+" "+mydo,mysettings,debug=debug,free=1,logfile=logfile)
  File "/usr/lib/portage/pym/portage.py", line 1567, in spawn
    return portage_exec.spawn_bash(mystring,env=env,**keywords)
  File "/usr/lib/portage/pym/portage_exec.py", line 46, in spawn_bash
    return spawn(args,env=env,opt_name=opt_name,**keywords)
  File "/usr/lib/portage/pym/portage_exec.py", line 160, in spawn
    raise str(e)+":\n   "+myc+" "+string.join(myargs)
execve() arg 3 contains a non-string value:
   /bin/bash [vixie-cron-4.1-r4] bash -c /usr/lib/portage/bin/ebuild.sh prerm
!!! FAILED prerm: 1