package sudo 1.8.12-1ubuntu3 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1

[Timothy Millar]

This happened after doing apt-get check and I was recommended to run apt-get -f install

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: sudo 1.8.12-1ubuntu3
ProcVersionSignature: Ubuntu 4.2.0-16.19-lowlatency 4.2.3
Uname: Linux 4.2.0-16-lowlatency x86_64
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
Date: Sun Nov 8 04:45:37 2015
DpkgHistoryLog:
 Start-Date: 2015-11-08 04:45:36
 Commandline: apt-get -f install
 Install: libportaudio2:i386 (19+svn20140130-1build1, automatic)
 Remove: sudo:amd64 (1.8.12-1ubuntu3), ubuntu-minimal:amd64 (1.341), guitarpro6:i386 (6.1.9)
DuplicateSignature: package:sudo:1.8.12-1ubuntu3:subprocess installed pre-removal script returned error exit status 1
ErrorMessage: subprocess installed pre-removal script returned error exit status 1
InstallationDate: Installed on 2015-10-23 (15 days ago)
InstallationMedia: Ubuntu-Studio 15.10 "Wily Werewolf" - Release amd64 (20151021)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5
 apt 1.0.10.2ubuntu1
SourcePackage: sudo
Title: package sudo 1.8.12-1ubuntu3 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
VisudoCheck:
 /etc/sudoers: parsed OK
 /etc/sudoers.d/README: parsed OK

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Seth Arnold (seth-arnold)]

Timothy, it'd probably be best to report this to the guitarpro6 packagers; it's plausible they've requested something that apt tried to satisfy by removing 'sudo', which would leave you with a very difficult problem.

Thanks

[Daniel Andrei Mincă (dminca)]

I've downloaded guitarpro from torrent and it was missing some dependencies.

When I did sudo apt-get install -f after it did it's job, I saw at the end that it was trying to delete the sudoers file also, but I didn't have that privilege (luckily) for that.

Be careful what you download and install from torrents.

If this helps, I've also scanned guitarpro package with clamav, and the clamscan was negative for viruses.