dpkg broken in Jammy image on singular-doc pkg extraction

[dimpase]

Using official Jammy image in Docker (macOS) and Podman (Fedora).
In both cases, using CLI in the image and running

apt install singular-doc
dpkg -V singular-doc

reports a lot of missing files. In fact, the only present files are dangling links to missing files in the package.
The package itself is not broken - extracting it in Jammy not in Docker/Podman (say, in an lxc container) works.
And extracting it in Debian/bookworm CLI run in Docker works too.

As well, the same behaviour is observed using the corresponding singular-doc_4.2.1-p3+ds-1_all.deb file, and installing it using dpkg -i. This points to dpkg as the culprit.

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What's unusual about singular-doc_4.2.1-p3+ds-1_all.deb ? I suppose

• data.tar is compressed using zst
• it contains symbolic links within the tarball.

The data.tar.zst tarball extracted from .deb works fine in Docker image CLI (assuming zstd is installed), so I presume it's something to do with dpkg expaning the file by itself.

This was found while working on https://trac.sagemath.org/ticket/32789

[dimpase]

also reported on https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/1960749

[mwhudson]

docker images contain a dpkg-filter to not install docs by default. You can run 'unminimize' to remove the filter and restore the missing files.