Bug#994081: libdvd-pkg: 1.4.3-1-1 Upgrade Results in 'apt-get check' Failure

[Alban Browaeys <prahal@yahoo.com>]

Package: libdvd-pkg
Version: 1.4.3-1-1
Followup-For: Bug #994081

Dear Maintainer,
TL;DR: could apt-get be called with "--dry-run" a flag when we call its
"check" command as to get libdvd-pkg triggers script to run?



The error trigger on each installi (or reinstall) or removal of a package.
libdvd-pkg: `apt-get check` failed, you may have broken packages. Aborting...

Adding "set -x" to /usr/lib/libdvd-pkg/b-i_libdvdcss.sh
and removing the stdout and stderr redirection from the "apt-get check"
and "dpkg -P nonexistent-package" calls, I get:

+ . /usr/lib/libdvd-pkg/VARS
+ PKGI=libdvd-pkg
+ DIR=/usr/src/libdvd-pkg
+ PKGG=libdvdcss2
+ PKGG_ALL=libdvdcss2 libdvdcss-dev
+ P88=88libdvdcss-pkg
+ VERGG=1.4.3-1
+ dpkg --status libdvdcss2
+ perl -0ne print $1 if m{^Status:\s+install\s+ok\s+installed}sm and m{^Version:\s+(\S+)}sm;
+ VERG=1.4.2-1~local
+ dpkg --compare-versions 1.4.3-1~local gt 1.4.2-1~local
+ [ 0 = 0 ]
+ [ -f /usr/src/libdvd-pkg/libdvdcss2-1.4.3-1.is-installed ]
+ dpkg -P non-existent-package
dpkg: warning: ignoring request to remove non-existent-package which isn't installed
+ [ 0 -eq 2 ]
+ [ ! -s /usr/src/libdvd-pkg/libdvdcss_1.4.3.orig.tar.bz2 ]
+ echo libdvd-pkg: Checking orig.tar integrity...
libdvd-pkg: Checking orig.tar integrity...
+ sha256sum --check --strict /usr/share/libdvd-pkg/libdvdcss_1.4.3.orig.tar.bz2.sha256
/usr/src/libdvd-pkg/libdvdcss_1.4.3.orig.tar.bz2: OK
+ [ 0 -ne 0 ]
+ apt-get check
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 2522949 (apt)
N: Be aware that removing the lock file is not a solution and may break your system.
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
+ [ 100 -ne 0 ]
+ echo libdvd-pkg: `apt-get check` failed, you may have broken packages. Aborting...
libdvd-pkg: `apt-get check` failed, you may have broken packages. Aborting...
+ exit 0


dpkg only check for /var/lib/dpkg/lock and /var/lib/dpkg/triggers/Lock

"apt-get check" always fails in a trigger as
[200~/var/lib/dpkg/lock-frontend is locked by the parent apt.
So the whole script is nowadays a noop.

I believe passing the "--dry-run" flag to "apt-get check" would keep the
consistency check and allow to the script to fulfill its duty.


-- System Information:
Debian Release: 12.0
  APT prefers stable-debug
  APT policy: (500, 'stable-debug'), (500, 'oldstable-updates'), (500, 'oldstable-security'), (500, 'oldstable-debug'), (500, 'oldoldstable'), (500, 'stable'), (500, 'oldstable'), (99, 'testing-debug'), (99, 'testing'), (90, 'unstable-debug'), (90, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.1.0-7-amd64 (SMP w/4 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libdvd-pkg depends on:
ii  build-essential               12.9
ii  debconf [debconf-2.0]         1.5.82
ii  debhelper [debhelper-compat]  13.11.4
ii  devscripts                    2.23.4
ii  wget                          1.21.3-1+b2

Versions of packages libdvd-pkg recommends:
ii  libcap2-bin  1:2.66-4

libdvd-pkg suggests no packages.

-- debconf information:
* libdvd-pkg/build: true
  libdvd-pkg/post-invoke_hook-remove: false
  libdvd-pkg/upgrade:
* libdvd-pkg/post-invoke_hook-install: true
  libdvd-pkg/title_u:
* libdvd-pkg/first-install:
  libdvd-pkg/title_b-i:

-- debsums errors found:
debsums: changed file /usr/lib/libdvd-pkg/b-i_libdvdcss.sh (from libdvd-pkg package)