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[bug#37725] [PATCH] gnu: lxqt-config: Add libkscreen as propagated-input

From: Efraim Flashner
Subject: [bug#37725] [PATCH] gnu: lxqt-config: Add libkscreen as propagated-inputs.
Date: Mon, 27 Apr 2020 19:39:37 +0300

On Thu, Apr 02, 2020 at 11:47:04PM +0430, Hamzeh Nasajpour wrote:
> Hi Ludo,
> Have we any conclusion here? _Reza_ sent a configuration and backtrace.
> Regards,
> Hamzeh
> On Mon, Oct 14, 2019, at 11:51 PM, Ludovic Courtès wrote:
> > Hi Hamzeh,
> > 
> > "Hamzeh Nasajpour" <address@hidden> skribis:
> > 
> > > The problem is crashing the `lxqt-config-monitor` when I want to run 
> > > it(`segmentation fault`). I installed the `libkscreen` and the problem 
> > > was resolved. So I change the `lxqt-config` package definition and remove 
> > > the `libkscreen` from `inputs` to `propagated-inputs`, install it and 
> > > everything was ok.
> > 
> > Do you have a simple ‘operating-system’ configuration and instructions
> > we could follow to reproduce the initial problem?
> > 
> > Thanks in advance,
> > Ludo’.
> >

I did some investigating myself and I think there's a regression in
qtbase somewhere.

guix environment --ad-hoc strace libkscreen lxqt-config -- strace -o 
~/lxqt-config-monitor.strace lxqt-config-monitor
QApplication: invalid style override passed, ignoring it.
    Available styles: Windows, Fusion
 (0x7ffc74134b40) Warning: "Icon Theme not set. Fallbacking to Oxygen, if 
 (0x7ffc74134b40) Warning: "Fallback Icon Theme (Oxygen) not found"

And no lxqt-config-monitor loaded. I've attached the strace, but it
shows it looking for the kscreen directory in qtbase/lib/qt5/plugins/kf5/kscreen
and lxqt-config/bin/kf5/kscreen. For the record it's in

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