On my media server, I wanted to set up Perl’s CPAN but when I ran install Bundle::CPAN, I ctrl-c’d out of it when I noticed that bzip2 wasn’t installed. Silly me. Soon after I started receiving:
Can’t call method “value” on an undefined value at /usr/share/perl5/IO/Uncompress/RawInflate.pm
Reinstalling Perl and all the related ubuntu packages doesn’t fix it, nor does removing the ~root/.cpan dir. There is an easy workaround though.
Reading package lists… Done
Building dependency tree
Reading state information… Done
Reading extended state information
Initializing package states… Done
Building tag database… Done
The following packages are BROKEN:
libio-compress-zlib-perl
The following packages have been kept back:
bind9-host dnsutils libbind9-30 libisccfg30
The following packages will be REMOVED:
libcompress-raw-zlib-perl
0 packages upgraded, 0 newly installed, 1 to remove and 4 not upgraded.
Need to get 0B of archives. After unpacking 319kB will be freed.
The following packages have unmet dependencies:
libio-compress-zlib-perl: Depends: libcompress-raw-zlib-perl (>= 2.008) but it is not installable
Resolving dependencies…
The following actions will resolve these dependencies:
Remove the following packages:
apparmor-utils
libcompress-zlib-perl
libio-compress-zlib-perl
libmp3-tag-perl
librpc-xml-perl
libwww-perl
libxml-parser-perl
ubuntu-standard
Score is 592
Accept this solution? [Y/n/q/?]
Make a note of the packages that it will remove, then tell it to go ahead. It will remove these packages!
Start cpan, and type in
. When it is complete, reinstall the ubuntu packages that you removed earlier (for example):
That’s it. Your cpan is working again 
