root@vivaldi:/var/lib/dpkg/info# . mumble-django.postrm purge
 * Reloading web server config                                                                           [ OK ]
Can't exec "-su": No such file or directory at /usr/share/perl/5.14/IPC/Open3.pm line 186.
open2: exec of -su purge failed at /usr/share/perl5/Debconf/ConfModule.pm line 59
16:01:31 2 aib@vivaldi:/var/crash$