Bug 411881

Application: systemsettings5 (5.16.5)

Qt Version: 5.12.3
Frameworks Version: 5.61.0
Operating System: Linux 5.0.0-27-generic x86_64
Distribution: KDE neon User Edition 5.16

-- Information about the crash:
- What I was doing when the application crashed:

Changing startup screen under "Startup and Shutdown" and applying changes, hanged after action was authenticated

The crash can be reproduced sometimes.

-- Backtrace:
Application: Systemeinstellungen (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa2e33e7680 (LWP 4290))]

Thread 9 (Thread 0x7fa28d3b0700 (LWP 4505)):
#0  qt_clock_gettime (ts=<optimized out>, clock=<optimized out>) at kernel/qelapsedtimer_unix.cpp:111
#1  do_gettime (frac=<optimized out>, sec=<optimized out>) at kernel/qelapsedtimer_unix.cpp:166
#2  qt_gettime () at kernel/qelapsedtimer_unix.cpp:175
#3  0x00007fa2df28dee9 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7fa210001610) at kernel/qtimerinfo_unix.cpp:91
#4  0x00007fa2df28e4c5 in QTimerInfoList::timerWait (this=0x7fa210001610, tm=...) at kernel/qtimerinfo_unix.cpp:388
#5  0x00007fa2df29015c in timerSourcePrepareHelper (timeout=0x7fa28d3afb94, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:132
#6  idleTimerSourcePrepare (source=<optimized out>, timeout=0x7fa28d3afb94) at kernel/qeventdispatcher_glib.cpp:212
#7  0x00007fa2d79abb28 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fa2d79ac4fb in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fa2d79ac6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fa2df28fdcb in QEventDispatcherGlib::processEvents (this=0x7fa210006700, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x00007fa2df23103a in QEventLoop::exec (this=this@entry=0x7fa28d3afd60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#12 0x00007fa2df0584ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#13 0x00007fa2df059c72 in QThreadPrivate::start (arg=0x561d251849c0) at thread/qthread_unix.cpp:361
#14 0x00007fa2d9d6b6db in start_thread (arg=0x7fa28d3b0700) at pthread_create.c:463
#15 0x00007fa2de95988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fa28e9c9700 (LWP 4503)):
#0  0x00007fa2de94cbf9 in __GI___poll (fds=0x7fa1a0003b70, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa2d79ac5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa2d79ac6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa2df28fdcb in QEventDispatcherGlib::processEvents (this=0x7fa1a0026850, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fa2df23103a in QEventLoop::exec (this=this@entry=0x7fa28e9c8d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fa2df0584ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007fa2df059c72 in QThreadPrivate::start (arg=0x561d264f7580) at thread/qthread_unix.cpp:361
#7  0x00007fa2d9d6b6db in start_thread (arg=0x7fa28e9c9700) at pthread_create.c:463
#8  0x00007fa2de95988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fa22cc82700 (LWP 4502)):
#0  0x00007fa2de9480b4 in __GI___libc_read (fd=41, buf=0x7fa22cc81b50, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fa2d79f12d0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa2d79ac0b7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa2d79ac570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa2d79ac6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa2df28fdcb in QEventDispatcherGlib::processEvents (this=0x7fa1bc007240, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fa2df23103a in QEventLoop::exec (this=this@entry=0x7fa22cc81d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007fa2df0584ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#8  0x00007fa2df059c72 in QThreadPrivate::start (arg=0x561d24d55e10) at thread/qthread_unix.cpp:361
#9  0x00007fa2d9d6b6db in start_thread (arg=0x7fa22cc82700) at pthread_create.c:463
#10 0x00007fa2de95988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fa1e1ffc700 (LWP 4499)):
#0  0x00007fa2de9480b4 in __GI___libc_read (fd=38, buf=0x7fa1e1ffbc90, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fa2d79f12d0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa2d79ac0b7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa2d79ac570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa2d79ac962 in g_main_loop_run () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa294e280e6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007fa2d79d4195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fa2d9d6b6db in start_thread (arg=0x7fa1e1ffc700) at pthread_create.c:463
#8  0x00007fa2de95988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fa29ab89700 (LWP 4498)):
#0  0x00007fa2de94cbf9 in __GI___poll (fds=0x561d253723e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa2d79ac5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa2d79ac6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa2d79ac721 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa2d79d4195 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa2d9d6b6db in start_thread (arg=0x7fa29ab89700) at pthread_create.c:463
#6  0x00007fa2de95988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fa2a7726700 (LWP 4308)):
#0  0x00007fa2de94cbf9 in __GI___poll (fds=0x7fa2a0004e00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa2d79ac5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa2d79ac6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa2df28fdcb in QEventDispatcherGlib::processEvents (this=0x7fa2a0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fa2df23103a in QEventLoop::exec (this=this@entry=0x7fa2a7725d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fa2df0584ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007fa2dce0e115 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa2df059c72 in QThreadPrivate::start (arg=0x561d2248b350) at thread/qthread_unix.cpp:361
#8  0x00007fa2d9d6b6db in start_thread (arg=0x7fa2a7726700) at pthread_create.c:463
#9  0x00007fa2de95988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fa2c7bf0700 (LWP 4293)):
#0  0x00007fa2de9480b4 in __GI___libc_read (fd=7, buf=0x7fa2c7befb20, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fa2d79f12d0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa2d79ac0b7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa2d79ac570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa2d79ac6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa2df28fdcb in QEventDispatcherGlib::processEvents (this=0x7fa2c0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fa2df23103a in QEventLoop::exec (this=this@entry=0x7fa2c7befd30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007fa2df0584ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#8  0x00007fa2df6fe015 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007fa2df059c72 in QThreadPrivate::start (arg=0x7fa2df975d80) at thread/qthread_unix.cpp:361
#10 0x00007fa2d9d6b6db in start_thread (arg=0x7fa2c7bf0700) at pthread_create.c:463
#11 0x00007fa2de95988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fa2cfb2e700 (LWP 4292)):
#0  0x00007fa2de94cbf9 in __GI___poll (fds=0x7fa2cfb2dc68, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa2d992f747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fa2d993136a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fa2d22eb578 in QXcbEventQueue::run (this=0x561d224b3ca0) at qxcbeventqueue.cpp:228
#4  0x00007fa2df059c72 in QThreadPrivate::start (arg=0x561d224b3ca0) at thread/qthread_unix.cpp:361
#5  0x00007fa2d9d6b6db in start_thread (arg=0x7fa2cfb2e700) at pthread_create.c:463
#6  0x00007fa2de95988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fa2e33e7680 (LWP 4290)):
[KCrash Handler]
#6  0x0000000000000001 in ?? ()
#7  0x00007fa2dfa8782d in QGuiApplicationPrivate::processActivatedEvent (e=0x561d23344170) at kernel/qguiapplication.cpp:2291
#8  0x00007fa2dfa8c45d in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x561d23344170) at kernel/qguiapplication.cpp:1858
#9  0x00007fa2dfa64b4b in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1151
#10 0x00007fa2d22ec59a in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105
#11 0x00007fa2d79ac417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007fa2d79ac650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007fa2d79ac6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007fa2df28fdaf in QEventDispatcherGlib::processEvents (this=0x561d224fe7a0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#15 0x00007fa2df23103a in QEventLoop::exec (this=this@entry=0x7ffc7495bad0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#16 0x00007fa2df23a170 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1363
#17 0x0000561d2072c218 in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:71

The reporter indicates this bug may be a duplicate of or related to bug 405261.

Possible duplicates by query: bug 411006, bug 405261, bug 404967.

Reported using DrKonqi