Bug#1059929: release.debian.org: gobject-introspection_1.78.1-9 is said to have an unsatisfiable dependency

[Simon McVittie]

Package: release.debian.org
Severity: normal
User: release.debian.org at packages.debian.org
Usertags: britney
X-Debbugs-Cc: gobject-introspection at packages.debian.org, debian-cross at lists.debian.org

gobject-introspection in experimental has this in
https://release.debian.org/britney/pseudo-excuses-experimental.html#gobject-introspection:

gobject-introspection (1.78.1-6 to 1.78.1-9)

    Migration status for gobject-introspection (1.78.1-6 to 1.78.1-9): BLOCKED: Rejected/violates migration policy/introduces a regression
    Issues preventing migration:
        gobject-introspection/amd64 has unsatisfiable dependency
        gobject-introspection/arm64 has unsatisfiable dependency
    Additional info:
        uninstallable on arch amd64, not running autopkgtest there
        uninstallable on arch arm64, not running autopkgtest there

The gobject-introspection binary package *is* installable, and in fact
I have it installed locally. Taking the amd64 version as an example,
it depends on:

- binutils-x86-64-linux-gnu:any, a real Multi-Arch: allowed package

- gcc-x86-64-linux-gnu, a virtual package provided by gcc:amd64

- gobject-introspection-bin | qemu-user | qemu-user-static, where
  g-i-bin is a Multi-Arch: allowed package from the same source

- gobject-introspection-little-endian:any, a virtual package provided
  by g-i-bin, which is Multi-Arch: allowed
  (experimentally, apt and dpkg both seem to be happy to assume that
  this makes the gobject-introspection-little-endian virtual package
  behave as though it was also Multi-Arch: allowed)

- pkgconf, a real package

- python3:any, a real Multi-Arch: allowed package

I think all of those are correct?

Or do I need to make gobject-introspection-bin Multi-Arch: foreign,
drop the :any from gobject-introspection-little-endian:any, and
replace the gobject-introspection-bin | qemu-user | qemu-user-static
dependency by python3 | qemu-user | qemu-user-static or similar?

My goal here is that you can install gobject-introspection:amd64 on an
amd64 machine, or on any other little-endian machine that will be able to
cross-compile amd64 binaries and then run them by explicitly invoking them
via qemu-user, as discussed with Helmut Grohne at the recent Cambridge
miniDebconf. (It has to be little-endian because g-ir-inspect and similar
tools don't currently support byte-swapping fields in binary typelibs.)

Thanks,
    smcv