[systemsettings] [Bug 355711] System Settings crashed during exit processing.

[Ken Derbyshire]

https://bugs.kde.org/show_bug.cgi?id=355711

--- Comment #48 from Ken Derbyshire  ---
(In reply to Christoph Feck from comment #47)
> *** Bug 375109 has been marked as a duplicate of this bug. ***

I apologise for the repeated bug reports Christoph, I am as new as they come to
Linux, so when something went wrong, I just followed the prompts. I can't
imagine how frustrating it must be to get flooded with duplicate reports for
already squashed bugs. I'll try and be more diligent about "looking before I
click" next time. I sincerely appreciate the excellent work you guys do with a
product that I am thoroughly enjoying the h*ll out of!

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[systemsettings] [Bug 375109] New: System settings started glitching and crashed after navigating quickly in tree mode

[Ken Derbyshire]

https://bugs.kde.org/show_bug.cgi?id=375109

Bug ID: 375109
   Summary: System settings started glitching and crashed after
navigating quickly in tree mode
   Product: systemsettings
   Version: 5.5.5
  Platform: Compiled Sources
OS: Linux
Status: UNCONFIRMED
  Keywords: drkonqi
  Severity: crash
  Priority: NOR
 Component: general
  Assignee: plasma-b...@kde.org
  Reporter: kd...@mail.com
  Target Milestone: ---

Application: systemsettings5 (5.5.5)
 (Compiled from sources)
Qt Version: 5.5.1
Operating System: Linux 4.4.0-59-generic x86_64
Distribution: Ultimate Edition 5.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Navigating and browsing through system settings with the view in tree mode.
Limited applications running. Changing between sub-categories inside the "Audio
Output Mode".  I switched quickly between the analog stereo and anolog duplex
mode about 5 or 6 times.  PC first started to lag and hang before becoming 
glitchy and freezing for an extended period of time (2-3 minutes). Once freeze
released, I shut-down settings and was greeted by the bug reporter.  Shortly
before initial lagging I noticed that the title text was lingering and
overlapping from one option screen to the next.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f633772a8c0 (LWP 5384))]

Thread 4 (Thread 0x7f62e1ec6700 (LWP 5516)):
#0  0x7f6333e47b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x7f6330d9838c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x7f6330d9849c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x7f63347747cf in
QEventDispatcherGlib::processEvents(QFlags) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x7f633471bb4a in
QEventLoop::exec(QFlags) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x7f6334538834 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x7f62e28fd7d7 in KCupsConnection::run() () from
/usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x7f633453d7be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x7f63312b96ba in start_thread (arg=0x7f62e1ec6700) at
pthread_create.c:333
#9  0x7f6333e5382d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f62fef69700 (LWP 5422)):
#0  0x7f6333e47b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x7f6330d9838c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x7f6330d9849c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x7f63347747cf in
QEventDispatcherGlib::processEvents(QFlags) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x7f633471bb4a in
QEventLoop::exec(QFlags) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x7f6334538834 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x7f6332eb73c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x7f633453d7be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x7f63312b96ba in start_thread (arg=0x7f62fef69700) at
pthread_create.c:333
#9  0x7f6333e5382d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f6326ea7700 (LWP 5385)):
#0  0x7f6333e47b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x7f6331b2fc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x7f6331b318d7 in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x7f632982b629 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x7f633453d7be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x7f63312b96ba in start_thread (arg=0x7f6326ea7700) at
pthread_create.c:333
#6  0x7f6333e5382d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f633772a8c0 (LWP 5384)):
[KCrash Handler]
#6  0x8000 in ?? ()
#7  0x7f6334750f49 in QObject::disconnect(QObject const*, char const*,
QObject const*, char const*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x7f63174621b3 in KParts::PartManager::~PartManager() () from
/usr/lib/x86_64-linux-gnu/libKF5Parts.so.5
#9  0x7f6317462369 in KParts::PartManager::~PartManager() () from
/usr/lib/x86_64-linux-gnu/libKF5Parts.so.5
#10 0x7f633474b28b in QObjectPrivate::deleteChildren() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x7f6334754b00 in QObject::~QObject() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x7f6317ba531b in KHTMLPart::~KHTMLPart() () from
/usr/lib/x86_64-linux-gnu/libKF5KHtml.so.5
#13 0x7f6317ba5439 in KHTMLPart::~KHTMLPart() () from
/usr/lib/x86_64-linux-gnu/libKF5KHtml.so.5
#1