[Bug 1869280] Re: Plasma system settings app crashes when selecting Virtual Desktops menu item

Bug Watch Updater 1869280 at bugs.launchpad.net
Thu Apr 16 08:59:38 UTC 2020 

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On 2020-03-19T08:15:37+00:00 Kipade wrote:

Created attachment 126883
crash backtrace

SUMMARY
I already export LANG as zh_CN.utf8, terminal works fine for Chinese language,
but plasma does not. So, I want to enter its system settings center to see what
is wrong about it. However, when I click the setting entry, it crashed always.

STEPS TO REPRODUCE
1. System Settings
2. Regional Settings / Language

OBSERVED RESULT
Crashed always

EXPECTED RESULT


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Slackware64 post 14.2 current (packages by AlienBob)
(available in About System)
KDE Plasma Version: 5.18.3
KDE Frameworks Version: 5.68.0
Qt Version: 5.13.2

ADDITIONAL INFORMATION

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/0

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On 2020-03-20T08:22:13+00:00 ZaWertun wrote:

Created attachment 126904
systemsettings5-20200320-112045.kcrash.txt

Same bug on Fedora 31.

System info:
Operating System: Fedora 31
KDE Plasma Version: 5.18.3
KDE Frameworks Version: 5.68.0
Qt Version: 5.13.2
Kernel Version: 5.5.9-200.fc31.x86_64
OS Type: 64-bit
Processors: 4 × AMD FX(tm)-9590 Eight-Core Processor
Memory: 22,4 ГиБ

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/1

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On 2020-03-20T08:25:16+00:00 ZaWertun wrote:

All required debug packages has been installed but still Dr.Konqi
reports that it's not enough.

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/2

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On 2020-03-20T17:29:20+00:00 ZaWertun wrote:

When I run "kcmshell5 kcm_translations" in the console I see following
errors:

file:///usr/share/kpackage/kcms/kcm_translations/contents/ui/main.qml:128:13: QML ColumnLayout: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/kpackage/kcms/kcm_translations/contents/ui/main.qml:39: TypeError: Cannot read property 'LanguageCode' of null
file:///usr/share/kpackage/kcms/kcm_translations/contents/ui/main.qml:43: TypeError: Cannot read property 'display' of null
KCrash: Application 'kcmshell5' crashing...
KCrash: Attempting to start /usr/libexec/drkonqi from kdeinit
sock_file=/run/user/1000/kdeinit5__0

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/3

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On 2020-03-27T08:16:53+00:00 Norbert Preining wrote:

Just to chime in, same here on home-compiled packages on Debian/sid.

I am using en_US as locale, so it is not depending on that.

I tried to start each kcm manually, which worked, but loading it from
the systemsettings5 application failed. (Loop over all modules given by
kcmshell5 --list and start the manually ... that is all fine!)

Any help would be appreciated. I add the crash report I got.

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/6

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On 2020-03-27T08:17:51+00:00 Norbert Preining wrote:

Created attachment 127041
kcrash save Debian/sid

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/7

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On 2020-03-27T08:20:04+00:00 Norbert Preining wrote:

One more comment: it seems to be a problem with kcm_translations! If I
remove/rename the kcm_translations.so module, then systemsettings5 does
NOT crash, shows a missing module warning in the Translation tab, but
the others can be used.

This reduces the culprit considerably I think.

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/8

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On 2020-04-06T10:22:30+00:00 Vascom wrote:

Same on Fedora 32, Plasma 5.18.4.

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/20

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On 2020-04-06T10:26:41+00:00 ZaWertun wrote:

One more thing.
If I run in the console "LANG=C kcmshell5 kcm_translation" - I see no crashes.
Running "kcmshell5 kcm_translations" gives me constant crashes.

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/21

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On 2020-04-06T11:42:18+00:00 U26 wrote:

*** Bug 419261 has been marked as a duplicate of this bug. ***

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/22

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On 2020-04-06T11:42:50+00:00 U26 wrote:

*** Bug 404518 has been marked as a duplicate of this bug. ***

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/23

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On 2020-04-06T11:55:17+00:00 U26 wrote:

One of the linked reports claims

>weirdly the crash is happening again when I add a CJK language at the
bottom of the list. :(

Could someone try and get me some reliable 100% reproducible steps,
ideally from a clean VM image.

The crash trace alone isn't proving super helpful, it's deep in Qt.

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/24

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On 2020-04-15T02:56:33+00:00 Nate-b wrote:

*** Bug 419406 has been marked as a duplicate of this bug. ***

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/26

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On 2020-04-15T02:56:39+00:00 Nate-b wrote:

*** Bug 419329 has been marked as a duplicate of this bug. ***

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/28

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On 2020-04-15T02:59:15+00:00 Nate-b wrote:

Bug 419329 has some clues. Apparently this is caused by 
https://cgit.kde.org/kirigami.git/commit/?id=9b7cae898ed7d9b58e65035b8216ec6ff78bfa17. I can't reproduce it though.

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/29

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On 2020-04-15T07:28:00+00:00 ZaWertun wrote:

(In reply to Nate Graham from comment #14)
> Bug 419329 has some clues. Apparently this is caused by 
> https://cgit.kde.org/kirigami.git/commit/
> ?id=9b7cae898ed7d9b58e65035b8216ec6ff78bfa17. I can't reproduce it though.

Nice! Reverting this commit actually helps!
Thanks for investigating :)

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On 2020-04-15T07:39:36+00:00 U26 wrote:

@yarloslav as you're compiling and can reproduce it, could you reapply
that diff and change

    connect(filter, &LanguageChangeEventFilter::languageChangeEvent,
this, &KirigamiPlugin::languageChangeEvent);

to

    connect(filter, &LanguageChangeEventFilter::languageChangeEvent,
this, &KirigamiPlugin::languageChangeEvent, Qt::QueuedConnection);

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/31

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On 2020-04-15T07:40:12+00:00 U26 wrote:

*Yaroslav

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/32

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On 2020-04-15T07:45:16+00:00 ZaWertun wrote:

Sure. One moment.

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https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/33

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On 2020-04-15T07:54:43+00:00 ZaWertun wrote:

Adding argument Qt::QueuedConnection to the connect doesn't seem to
help, I still see crashes.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/comments/34


** Changed in: kirigami2
       Status: Unknown => New

** Changed in: kirigami2
   Importance: Unknown => Critical

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Title:
  Plasma system settings app crashes when selecting Virtual Desktops
  menu item

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