The error message in question is "Max. recursion depth with nested structures exceeded at Storable.pm line 278".
----- root@wibble# apt-get install apt-show-versions Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: apt-show-versions 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/34.3 kB of archives. After this operation, 162 kB of additional disk space will be used. Selecting previously unselected package apt-show-versions. (Reading database ... 143750 files and directories currently installed.) Preparing to unpack .../apt-show-versions_0.22.7_all.deb ... Unpacking apt-show-versions (0.22.7) ... Setting up apt-show-versions (0.22.7) ... ** initializing cache. This may take a while ** Max. recursion depth with nested structures exceeded at /usr/local/lib/x86_64-linux-gnu/perl/5.24.1/Storable.pm line 278, at /usr/bin/apt-show-versions line 274. dpkg: error processing package apt-show-versions (--configure): subprocess installed post-installation script returned error exit status 25 Processing triggers for man-db (2.7.6.1-2) ... Errors were encountered while processing: apt-show-versions needrestart is being skipped since dpkg has failed E: Sub-process /usr/bin/dpkg returned an error code (1) ----- Thanks!