[Bug 1961791] Re: 2.54.3+21.10.1ubuntu0.1 broke Plasma Desktop when Fish is the default shell

[Matteo Italia]

Other trivial workaround: keep snapd to 2.44.3 (at least on 20.04),
possibly forever. There's a serious QA problem here, in a week I got
three updates, each of which progressively broke stuff worse than the
previous one:

- first warnings every time I opened a shell
- then broken XDG env, which made applications crash in the strangest ways but only when started from the shell
- then even more broken XDG env that literally _broke the user session after login_.

I don't think a bug can get worse than this, as it makes the machine
(progressively more) impossible to use _for tasks unrelated to those for
which you need this package_, and, with the exception of the first
problem, without any hint about the fact that it's snapd fault — in the
last case I only suspected that (and downgraded) because I was bit by
the first issue, I had to debug the second one, and it dawned on me that
they could have fucked up the fix for a third time after managing to
open a shell inside the broken session through strange expedients and
checking the environment.

I get that the Linux desktop environment initialization is a shitshow,
but after breaking this for the first time the response should have been
immediate rollback and _thorough_ testing instead rushing fixes, at
least on the LTS channel.

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https://bugs.launchpad.net/bugs/1961791

Title:
  2.54.3+21.10.1ubuntu0.1 broke Plasma Desktop when Fish is the default
  shell

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