https://bugs.kde.org/show_bug.cgi?id=404518

            Bug ID: 404518
           Summary: System Settings crashed when added another preferred
                    language in Regional Settings
           Product: systemsettings
           Version: 5.15.0
          Platform: Ubuntu Packages
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: plasma-b...@kde.org
          Reporter: hung0966609...@gmail.com
  Target Milestone: ---

Application: systemsettings5 (5.15.0)

Qt Version: 5.12.0
Frameworks Version: 5.55.0
Operating System: Linux 4.15.0-45-generic x86_64
Distribution: KDE neon User Edition 5.15

-- Information about the crash:
- What I was doing when the application crashed:
Add Vietnamese to the list of Preferred Languages.
I did it plenty of times, with another language as well (Japanese) to test and
still receiving the same crash. But after like 4 or 5 tries, it works with
JPese, but Vietnamese not worked.

The crash can be reproduced every time.

-- 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 0x7fc109e8f840 (LWP 1628))]

Thread 6 (Thread 0x7fc0cd8bb700 (LWP 1636)):
#0  0x00007fc1054040b4 in __GI___libc_read (fd=31, buf=0x7fc0cd8bab30,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fc0fe6bccd0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0fe678027 in g_main_context_check () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0fe6784e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc0fe67864c in g_main_context_iteration () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc105d4b15b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc105cec64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc105b1441a in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc103ad32e5 in QQmlThreadPrivate::run (this=0x55673b6f6a80) at
qml/ftw/qqmlthread.cpp:148
#9  0x00007fc105b15bc2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc100a366db in start_thread (arg=0x7fc0cd8bb700) at
pthread_create.c:463
#11 0x00007fc10541588f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fc0d5e05700 (LWP 1635)):
#0  0x00007fc1054040b4 in __GI___libc_read (fd=24, buf=0x7fc0d5e04b30,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fc0fe6bccd0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0fe678027 in g_main_context_check () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0fe6784e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc0fe67864c in g_main_context_iteration () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc105d4b15b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc105cec64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc105b1441a in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc103ad32e5 in QQmlThreadPrivate::run (this=0x55673ad293d0) at
qml/ftw/qqmlthread.cpp:148
#9  0x00007fc105b15bc2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc100a366db in start_thread (arg=0x7fc0d5e05700) at
pthread_create.c:463
#11 0x00007fc10541588f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fc0deb19700 (LWP 1633)):
#0  0x00007fc105408bf9 in __GI___poll (fds=0x7fc0d8004a00, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fc0fe678539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0fe67864c in g_main_context_iteration () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc105d4b15b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc105cec64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc105b1441a in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc103ad32e5 in QQmlThreadPrivate::run (this=0x55673a79fe30) at
qml/ftw/qqmlthread.cpp:148
#7  0x00007fc105b15bc2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc100a366db in start_thread (arg=0x7fc0deb19700) at
pthread_create.c:463
#9  0x00007fc10541588f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fc0ee8d4700 (LWP 1631)):
#0  0x00007fc1054040b4 in __GI___libc_read (fd=7, buf=0x7fc0ee8d3b20,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fc0fe6bccd0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0fe678027 in g_main_context_check () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0fe6784e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc0fe67864c in g_main_context_iteration () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc105d4b15b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc105cec64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc105b1441a in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc1061b9015 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007fc105b15bc2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc100a366db in start_thread (arg=0x7fc0ee8d4700) at
pthread_create.c:463
#11 0x00007fc10541588f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fc0f6904700 (LWP 1630)):
#0  0x00007fc105408bf9 in __GI___poll (fds=0x7fc0f6903c78, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fc1005fa747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fc1005fc36a in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fc0f8e9cd4a in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fc105b15bc2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc100a366db in start_thread (arg=0x7fc0f6904700) at
pthread_create.c:463
#6  0x00007fc10541588f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fc109e8f840 (LWP 1628)):
[KCrash Handler]
#6  0x00007fc1039576fe in QQmlData::wasDeleted (object=0x55673cf3ad60) at
../../include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/qml/qqmldata_p.h:337
#7  QV4::QObjectWrapper::wrap (engine=engine@entry=0x55673bf16ff0,
object=0x55673cf3ad60) at
../../include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/jsruntime/qv4qobjectwrapper_p.h:209
#8  0x00007fc1039f162b in QV4::ExecutionEngine::fromVariant
(this=this@entry=0x55673bf16ff0, variant=...) at jsruntime/qv4engine.cpp:1495
#9  0x00007fc103956b1f in QV4::QQmlContextWrapper::virtualGet (m=<optimized
out>, id=..., receiver=<optimized out>, hasProperty=<optimized out>) at
jsruntime/qv4qmlcontext.cpp:223
#10 0x00007fc1038fda0e in QV4::Object::get (hasProperty=0x7ffe4014b277,
receiver=0x7fc0ccc7c678, id=..., this=<optimized out>) at
jsruntime/qv4object_p.h:314
#11 QV4::ExecutionContext::getProperty (this=0x7fc0ccc7c5f8,
name=0x7fc0ccc7c670) at jsruntime/qv4context.cpp:360
#12 0x00007fc1039fa400 in QV4::Runtime::method_loadName (engine=0x55673bf16ff0,
nameIndex=<optimized out>) at jsruntime/qv4runtime.cpp:985
#13 0x00007fc0d403a9d8 in ?? ()
#14 0x0000000000000000 in ?? ()

Reported using DrKonqi

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