Bug#1033617: libopenexr-dev: Cannot just upgrade libopenexr-dev to 3.1.5-4 because of file conflict with older version of libilmbase-dev

[Felix Stupp]

Package: libopenexr-dev
Version: 3.1.5-4
Severity: serious
Justification: Policy 7.4
X-Debbugs-Cc: me+debian-bugs at banananet.work

Dear Maintainer,

I cannot upgrade this package from version 2.5.7-1 to version 3.1.5-4
due to a file conflict with the package libilmbase-dev on version
2.5.4-1. I tried with apt & aptitude as well. Both want to replace
libilmbase-dev with libopenexr-dev in a single execution of them, but
fail to do that in a way that dpkg allows that (tries first to install
the new package and then uninstall the old one).
Currently I see no other solution than removing the old one first aside
with all packages depending it on it, and then installing the new one
with all packages which were removed before.

They already have a "Breaks" & a "Replace" relationship, which seems to
be right, but I assume adding a "Conflicts" relation will fix that,
for "Breaks" "dpkg will refuse to allow the package […] to be unpacked
unless the broken package is deconfigured first", while for "Conflicts"
it says that "dpkg will refuse to allow them to be unpacked on the
system at the same time".

I marked this bug as serious as I think, even if another solution may be
found, that still a Conflicts field on this package referring to the
older one may be required unless that is not possible. However, I'm not
100% sure, so feel free to change the severity. Maybe I just ran into
this problem due to other circumstances a stable user will not run into.

Also I assume that if this configuration will be released into bookworm,
others will having problems as well.

Best Regards,
Felix Stupp


-- System Information:
Debian Release: 12.0
  APT prefers testing
  APT policy: (550, 'testing'), (500, 'testing-security'), (400, 'stable-updates'), (400, 'stable-security'), (400, 'stable'), (110, 'unstable'), (102, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.1.0-3-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=de_DE.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 libopenexr-dev depends on:
pn  libilmbase-dev  <none>
ii  libopenexr25    2.5.7-1

libopenexr-dev recommends no packages.

libopenexr-dev suggests no packages.

-- no debconf information