Public bug reported:
When variable PAGER isn't in the environment, apt changelog always
outputs this message:
usage: which [-as] program ...
but it goes on and shows the changelog with less. Most certainly it's
running:
which $PAGER
without checking first if PAGER is empty.
sensible-browser has the same bug, but with variable BROWSER:
bug #1782447
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: apt 1.6.3
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Jul 19 09:35:46 2018
InstallationDate: Installed on 2018-04-28 (81 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: apt
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: apt (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1782567
Title:
apt changelog outputs "usage: which [-as] program ..." if variable
PAGER doesn't exist
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