https://bugs.kde.org/show_bug.cgi?id=432317

Andrey <butir...@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #4 from Andrey <butir...@gmail.com> ---
Bisecting KWin lead to this:
```
commit a0c7f997d4714ae89ed8ff5ee2bb353ab4b0de60 (HEAD, refs/bisect/bad)
Author: Jonathan Riddell <j...@jriddell.org>
Date:   Thu Jan 21 12:07:20 2021 +0000

    Update version number for 5.20.90
    GIT_SILENT

commit e370fcb218ab5ef63928564bd7124fa17acac63f
(refs/bisect/good-e370fcb218ab5ef63928564bd7124fa17acac63f)
Author: Vlad Zahorodnii <vlad.zahorod...@kde.org>
Date:   Thu Jan 21 09:04:58 2021 +0200

    Simplify Toplevel::addRepaintFull()

    This avoids mapping the visible rect between the window local
    coordinates and the global coordinates back and forth.
```

So just bumping the version provoked the crash.
kwayland-server was on e1e3a4a commit.

Bad thing I can't reproduce it any more on clean Plasma reinstall.

My conclusion: the installation system is very fragile.
There is no guarantee next build won't screw you installation up.
We can't protect ourselves from it in any way currently.
The only thing we can do is reinstall from scratch as frequent as possible.
Which doesn't feel too satisfiable.

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