Bug#1079457: cups: Dependencies prevent installation

[Daniel Lewart <lewart3@gmail.com>]

Dear Alex, Thorsten, et al,

On Mon, 23 Sep 2024 16:16:46 +0000 (UTC), Thorsten Alteholz
<debian@alteholz.de> wrote:

> In a newly created chroot I can install cups without problems, so the dependencies of cups are fine.
>
> libcupsfilters2-common is part of the new cups v3. It must not be installed on a computer that still uses cups v2.
> As cups v3 is not yet ready at all to be part of Debian, it makes no sense to actually use that package now.
> Please identify the package on your system that depends on any package created by src:libcupsfilters and file a bug against that package.
> There seem to be some Conflicts:/Breaks: missing.

I find it confusing that libcupsfilters2-common is v3, not v2!

The following binaries are created by src:libcupsfilters:
  * libcupsfilters-tests
  * libcupsfilters2
  * libcupsfilters2-common
  * libcupsfilters2-dev

Here are each of their reverse dependencies:
---
$ apt rdepends libcupsfilters-tests
libcupsfilters-tests
Reverse Depends:

$ apt rdepends libcupsfilters2
libcupsfilters2
Reverse Depends:
  Recommends: libcupsfilters2-common (>= 2.0.0-3)
  Depends: libcupsfilters2-dev (= 2.0.0-3)
  Depends: cpdb-backend-cups (>= 2.0.0)
  Depends: libcupsfilters-tests (>= 2.0.0)

$ apt rdepends libcupsfilters2-common
libcupsfilters2-common
Reverse Depends:
  Depends: libcupsfilters2 (>= 2.0.0-3)

$ apt rdepends libcupsfilters2-dev
libcupsfilters2-dev
Reverse Depends:
---

So the problematic package appears to be:
  * Package: cpdb-backend-cups
  * Maintainer: Thorsten Alteholz <debian@alteholz.de>
  * Depends: ..., libcupsfilters2 (>= 2.0.0), ...
And it is Recommended by libgtk-4-1.

FYI, NoisyCoil filed a bug against cpdb-backend-cups:
        https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1084195

Thank you,
Daniel Lewart
Urbana, Illinois