[systemsettings] [Bug 392979] settings crash

[Matheus]

https://bugs.kde.org/show_bug.cgi?id=392979

--- Comment #9 from Matheus  ---
Okay thanks!

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[systemsettings] [Bug 392979] settings crash

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=392979

--- Comment #8 from Nate Graham  ---
Oy va voy, yes indeed, I reversed the two Qt versions. Fixed in 5.95.

The lag you mention is another issue that should be reported separately.

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[systemsettings] [Bug 392979] settings crash

[Matheus]

https://bugs.kde.org/show_bug.cgi?id=392979

--- Comment #7 from Matheus  ---
You mean fixed in Qt 5.9.5 right. Okay I hope it gets fixed for the lts
release! But does it have any relationship with this lagging on some
applications sometimes?

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[systemsettings] [Bug 392979] settings crash

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=392979

--- Comment #6 from Nate Graham  ---
(In reply to Matheus from comment #5)
> Is this a widespread problem with kde? I've experiencing some lagging
> behaviors on most applications that works fine on the other DE's I have
> installed.

It's a bug in Qt. It was fixed in Qt 5.9.4 and 5.10.0, but according to the bug
report you're still on 5.9.5, so that would explain it.

Kubuntu Bionic is scheduled to ship with 5.9.5, but in case it doesn't, I'll
make sure the fix gets backported to the 5.4.9 version we do ship.

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[systemsettings] [Bug 392979] settings crash

[Matheus]

https://bugs.kde.org/show_bug.cgi?id=392979

--- Comment #5 from Matheus  ---
Is this a widespread problem with kde? I've experiencing some lagging behaviors
on most applications that works fine on the other DE's I have installed.

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[systemsettings] [Bug 392979] settings crash

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=392979

--- Comment #4 from Christoph Feck  ---
>From how I understand the issue, there was a dangling object pointer, which
caused all sorts of crashes. It is very likely a duplicate.

We also have bug 388414 tracking the same issue for systemsettings.

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[systemsettings] [Bug 392979] settings crash

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=392979

--- Comment #3 from Nate Graham  ---
I think so; the QtQuick part is in QQuickItemPrivate::deliverKeyEvent(). We saw
a lot of backtraces like this in Discover, too--all traced back to the same
root cause issue. However, it's quite likely I'm wrong, as you have much more
experience reading backtraces than I do, so if I'm smoking crack, feel free to
un-dupe it.

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[systemsettings] [Bug 392979] settings crash

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=392979

David Edmundson  changed:

   What|Removed |Added

 CC||k...@davidedmundson.co.uk

--- Comment #2 from David Edmundson  ---
Nate, you sure?

#8  0x7ff8708c821d in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5

It's a qobject_cast in QWidget code. That other trace is all QtQuick

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[systemsettings] [Bug 392979] settings crash

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=392979

Nate Graham  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |DUPLICATE
 CC||n...@kde.org

--- Comment #1 from Nate Graham  ---


*** This bug has been marked as a duplicate of bug 378339 ***

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