Bug#913069: python3-arcus + python3-savitar missing in the transition page, but uninstallable

[Gregor Riepl <onitake@gmail.com>]

>> But that doesn't suffice, there's likely a "| .build-depends ~
>> /python3-all-dev/" missing.
> 
> As pochu explained, that's not true.
> 
>> Affected source package is e.g. libarcus whose binary package
>> python3-arcus is currently uninstallable, but has no python3-dev in
>> the build-dependencies:
> 
> That's a bug: https://bugs.debian.org/905803
> 
>> The same counts for python3-savitar and src:libsavitar:
> 
> And another bug: https://bugs.debian.org/909730

I'm aware of the issues, but haven't found time to work on them lately.

> I'm CCing the maintainer, so he can be more aware of the small noises
> such "buggy" packages cause.

I can replace python3-all-dev with python3-dev for now, but it would be better
to actually fix this and have multi-python builds.

Arcus and Savitar are SIP modules written in C++ and built with cmake.
It's not trivial to make them build automagically for all installed Python
versions.

Any help on these bugs would be very much appreciated.