[Pkg-nginx-maintainers] Bug#1032517: nginx settings deleted on upgrade

[Ralf Jung]

Package: nginx
Version: 1.22.1-7
Severity: grave
Justification: causes non-serious data loss

Dear Maintainer,

last weekend I did an "apt upgrade" of my system as usual, asking apt to prune configuration files for packages that are being uninstalled.
Now I realize that my nginx stopped working, and it turns out its configuration files are just completely gone.
Look like the recent package reorganization went wrong and actually deletes configuration under certain conditions -- that's pretty bad.
Package updates shouldn't cause a loss of configuration files, even when pruning packages that are not present any more.

Kind regards,
Ralf

-- System Information:
Debian Release: bookworm/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'testing-debug'), (100, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.1.0-5-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_USER
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.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 nginx depends on:
ii  debconf [debconf-2.0]  1.5.82
ii  iproute2               6.1.0-1
ii  libc6                  2.36-8
ii  libcrypt1              1:4.4.33-2
ii  libpcre2-8-0           10.42-1
ii  libssl3                3.0.8-1
ii  zlib1g                 1:1.2.13.dfsg-1

nginx recommends no packages.

Versions of packages nginx suggests:
ii  fcgiwrap   1.1.0-14
pn  nginx-doc  <none>
ii  ssl-cert   1.1.2

-- Configuration Files:
/etc/nginx/fastcgi.conf [Errno 2] No such file or directory: '/etc/nginx/fastcgi.conf'
/etc/nginx/fastcgi_params [Errno 2] No such file or directory: '/etc/nginx/fastcgi_params'
/etc/nginx/koi-utf [Errno 2] No such file or directory: '/etc/nginx/koi-utf'
/etc/nginx/koi-win [Errno 2] No such file or directory: '/etc/nginx/koi-win'
/etc/nginx/mime.types [Errno 2] No such file or directory: '/etc/nginx/mime.types'
/etc/nginx/nginx.conf [Errno 2] No such file or directory: '/etc/nginx/nginx.conf'
/etc/nginx/proxy_params [Errno 2] No such file or directory: '/etc/nginx/proxy_params'
/etc/nginx/scgi_params [Errno 2] No such file or directory: '/etc/nginx/scgi_params'
/etc/nginx/sites-available/default [Errno 2] No such file or directory: '/etc/nginx/sites-available/default'
/etc/nginx/snippets/fastcgi-php.conf [Errno 2] No such file or directory: '/etc/nginx/snippets/fastcgi-php.conf'
/etc/nginx/snippets/snakeoil.conf [Errno 2] No such file or directory: '/etc/nginx/snippets/snakeoil.conf'
/etc/nginx/uwsgi_params [Errno 2] No such file or directory: '/etc/nginx/uwsgi_params'
/etc/nginx/win-utf [Errno 2] No such file or directory: '/etc/nginx/win-utf'

-- debconf information:
  nginx/log-symlinks: