Comment 11 for bug 1815761

All reverified against the new versions (versions in log below).

$ lxc exec apt-cosmic -- apt upgrade apt libapt-pkg5.0 -tnow -o APT::Install::Post-Invoke-Success::="/bin/echo TEST1815761"
Reading package lists... Done
Building dependency tree
Reading state information... Done
apt is already the newest version (1.7.4).
libapt-pkg5.0 is already the newest version (1.7.4).
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
  libfreetype6
Use 'apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
TEST1815761

$ lxc exec apt-bionic -- apt upgrade apt libapt-pkg5.0 -tnow -o APT::Install::Post-Invoke-Success::="/bin/echo TEST1815761"
Reading package lists... Done
Building dependency tree
Reading state information... Done
apt is already the newest version (1.6.10).
libapt-pkg5.0 is already the newest version (1.6.10).
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
  libfreetype6
Use 'apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
TEST1815761

$ lxc exec apt-xenial -- apt upgrade apt libapt-pkg5.0 -tnow -o APT::Install::Post-Invoke-Success::="/bin/echo TEST1815761"
Reading package lists... Done
Building dependency tree
Reading state information... Done
apt is already the newest version (1.2.31).
libapt-pkg5.0 is already the newest version (1.2.31).
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
  libfreetype6
Use 'apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
TEST1815761

$ lxc exec apt-trusty -- apt upgrade apt libapt-pkg4.12 -tnow -o APT::Install::Post-Invoke-Success::="/bin/echo TEST1815761"
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
apt is already the newest version.
libapt-pkg4.12 is already the newest version.
The following packages were automatically installed and are no longer required:
  libfreetype6 os-prober
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
TEST1815761

$ lxc exec apt-trusty -- apt-cache policy apt
apt:
  Installed: 1.0.1ubuntu2.22
  Candidate: 1.0.1ubuntu2.22
  Version table:
 *** 1.0.1ubuntu2.22 0
        500 http://archive.ubuntu.com/ubuntu/ trusty-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     1.0.1ubuntu2.20 0
        500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
     1.0.1ubuntu2.19 0
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     1.0.1ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages