[DSE-Dev] Bug#1063329: libselinux1t64: breaks system in upgrade from unstable

[Andreas Metzler]

On 2024-02-06 Helmut Grohne <helmut at subdivi.de> wrote:
> Package: libselinux1t64

[...]> This looks fairly innocuous. We create a minimal sid chroot and install
> libselinux1t64 using apt. What could possibly go wrong? Well, apt thinks
> that it would be a good idea to avoid coinstalling breaking packages and
> first removes libselinux1 before proceeding to install libselinux1t64.
> Unfortunately, libselinux1 is transitively essential and dpkg links it,
[...]
> both dpkg and tar are now broken. This is pretty bad. To make matters
> worse, the situation arises from the combination of Breaks + Provides
[...]

Hello,

color me stupid but isn't this fishy?

Package: libselinux1t64
Replaces: libselinux1
Provides: libselinux1 (= 3.5-2.1~exp1)
Breaks: libselinux1 (<< 3.5-2.1~exp1)

Afaiui libselinux1t64 must not fullfill dpkg 1.22.4's dependency on
"libselinux1 (>= 3.1~)". dpkg needs to be rebuilt and the rebuilt
version gets a dep on "libselinux1t64 (>= 3.5)".

Will ${t64:Provides} stop expanding to "libselinux1 = ${binary:Version
for real t64-builds? (The ones in experimental are not.) If that is case
this bug and this way of testing does not make sense.

Otherwise the plan looks flawed.

cu Andreas
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