[kmail2] [Bug 401923] New: KMail crashes randomly in connection with the display of Emails (probably a problem with Nouveau)

Cyril Brosch bugzilla_noreply at kde.org
Sun Dec 9 11:44:10 GMT 2018 

https://bugs.kde.org/show_bug.cgi?id=401923

            Bug ID: 401923
           Summary: KMail crashes randomly in connection with the display
                    of Emails (probably a problem with Nouveau)
           Product: kmail2
           Version: unspecified
          Platform: Chakra
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: info at cyrilbrosch.net
  Target Milestone: ---

Application: kmail (5.9.3)

Qt Version: 5.11.2
Frameworks Version: 5.52.0
Operating System: Linux 4.18.12-1-CHAKRA x86_64
Distribution: "Chakra"

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

Very often during use, when I click a new mail in order to do any action (view,
delete, copy, etc.), but sometimes also during startup or closing the program,
KMail crashes. It's hard to work longer than 5 mins with it without a crash.
I finally got a usable backtrace after the update to Plasma 5.14.4, frameworks
5.52.0, Qt 5.11.2, but this happened also in the versions before that, but not
before the latter versions, so the bug was introduced somewhen this
spring/summer, I guess.
I can't read backtraces, but I see Qt and Nouveau driver pop up there many
times.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KMail (kmail), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ff3b1d4d900 (LWP 948))]

Thread 35 (Thread 0x7ff28ceb9700 (LWP 1220)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ec8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 34 (Thread 0x7ff28d6ba700 (LWP 1219)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ee71 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 33 (Thread 0x7ff28e54c700 (LWP 1205)):
#0  0x00007ff3a0755e34 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007ff3a07a6536 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ff3a07a664c in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3  0x00007ff3af752d7b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7ff338007160, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007ff3af6ffb0b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ff28e54bca0,
flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#5  0x00007ff3af54ed16 in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:525
#6  0x00007ff3af5588e7 in QThreadPrivate::start(void*) (arg=0x5642c28427d0) at
thread/qthread_unix.cpp:367
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 32 (Thread 0x7ff30ff5e700 (LWP 1201)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff3926d941a in  () at /usr/lib/libQt5Script.so.5
#2  0x00007ff3926d9439 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 31 (Thread 0x7ff31075f700 (LWP 1053)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ec8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 30 (Thread 0x7ff3127f4700 (LWP 1041)):
#0  0x00007ff3aee813c8 in __strcmp_ssse3 () at /usr/lib/libc.so.6
#1  0x00007ff3aed7d217 in transcmp () at /usr/lib/libc.so.6
#2  0x00007ff3aee4061b in tfind () at /usr/lib/libc.so.6
#3  0x00007ff3aed7e0b3 in __dcigettext () at /usr/lib/libc.so.6
#4  0x00007ff3aedd41cc in strerror_r () at /usr/lib/libc.so.6
#5  0x00007ff3aedd40ef in strerror () at /usr/lib/libc.so.6
#6  0x00007ff38daf82d1 in event_warn () at /usr/lib/libevent-2.1.so.6
#7  0x00007ff38daf9c0c in  () at /usr/lib/libevent-2.1.so.6
#8  0x00007ff38daef8b4 in event_base_loop () at /usr/lib/libevent-2.1.so.6
#9  0x00007ff39773b839 in  () at /usr/lib/libQt5WebEngineCore.so.5
#10 0x00007ff39775aa8b in  () at /usr/lib/libQt5WebEngineCore.so.5
#11 0x00007ff39777d854 in  () at /usr/lib/libQt5WebEngineCore.so.5
#12 0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#13 0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#14 0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 29 (Thread 0x7ff312ff5700 (LWP 1040)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397735330 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39775aa8b in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39777d854 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 28 (Thread 0x7ff3137f6700 (LWP 1038)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ec8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 27 (Thread 0x7ff31fff7700 (LWP 1037)):
#0  0x00007ff387ef593c in  () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#1  0x00007ff387ef61bf in  () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#2  0x00007ff39054ca18 in pa_mainloop_dispatch () at /usr/lib/libpulse.so.0
#3  0x00007ff39054cdee in pa_mainloop_iterate () at /usr/lib/libpulse.so.0
#4  0x00007ff39054ce70 in pa_mainloop_run () at /usr/lib/libpulse.so.0
#5  0x00007ff39055acd9 in  () at /usr/lib/libpulse.so.0
#6  0x00007ff387f06088 in  () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 26 (Thread 0x7ff3247f8700 (LWP 1036)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397735330 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39775aa8b in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39777d854 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 25 (Thread 0x7ff324ff9700 (LWP 1035)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766d49 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff3981c93f8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff3977803c6 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 24 (Thread 0x7ff3257fa700 (LWP 1034)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766d49 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768af8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768b8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d9a8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ee71 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 23 (Thread 0x7ff325ffb700 (LWP 1033)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ee71 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 22 (Thread 0x7ff3267fc700 (LWP 1032)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ee71 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 21 (Thread 0x7ff326ffd700 (LWP 1031)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766d49 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768af8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768b8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39773531f in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39775aa8b in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff39777d854 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 20 (Thread 0x7ff3277fe700 (LWP 1030)):
#0  0x00007ff3aee445f6 in epoll_pwait () at /usr/lib/libc.so.6
#1  0x00007ff38daf9a65 in  () at /usr/lib/libevent-2.1.so.6
#2  0x00007ff38daef8b4 in event_base_loop () at /usr/lib/libevent-2.1.so.6
#3  0x00007ff39773b974 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39775aa8b in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39687146a in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff396871917 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff39777d988 in  () at /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#9  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 19 (Thread 0x7ff327fff700 (LWP 1029)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766d49 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768af8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768b8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d9a8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ec8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 18 (Thread 0x7ff33cff9700 (LWP 1028)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766d49 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768af8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768b8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d9a8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ee71 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 17 (Thread 0x7ff33d7fa700 (LWP 1027)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766d49 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768af8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768b8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d9a8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ec8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 16 (Thread 0x7ff33dffb700 (LWP 1026)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766d49 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768af8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768b8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d9a8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ec8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 15 (Thread 0x7ff33e7fc700 (LWP 1025)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766d49 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768af8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768b8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d9a8 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ec8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 14 (Thread 0x7ff33effd700 (LWP 1024)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ee71 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 13 (Thread 0x7ff33f7fe700 (LWP 1023)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ee71 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7ff33ffff700 (LWP 1022)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ee71 in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7ff34cf7e700 (LWP 1021)):
#0  0x00007ff3a4574b64 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff397766e17 in  () at /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007ff397768aea in  () at /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007ff397768bd2 in  () at /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007ff39776d991 in  () at /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007ff39776ec8f in  () at /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7ff34d77f700 (LWP 1020)):
#0  0x00007ff3aed7d250 in transcmp () at /usr/lib/libc.so.6
#1  0x00007ff3aee4061b in tfind () at /usr/lib/libc.so.6
#2  0x00007ff3aed7e0b3 in __dcigettext () at /usr/lib/libc.so.6
#3  0x00007ff3aedd41cc in strerror_r () at /usr/lib/libc.so.6
#4  0x00007ff3aedd40ef in strerror () at /usr/lib/libc.so.6
#5  0x00007ff38daf82d1 in event_warn () at /usr/lib/libevent-2.1.so.6
#6  0x00007ff38daf9c0c in  () at /usr/lib/libevent-2.1.so.6
#7  0x00007ff38daef8b4 in event_base_loop () at /usr/lib/libevent-2.1.so.6
#8  0x00007ff39773b839 in  () at /usr/lib/libQt5WebEngineCore.so.5
#9  0x00007ff39775aa8b in  () at /usr/lib/libQt5WebEngineCore.so.5
#10 0x00007ff39777d854 in  () at /usr/lib/libQt5WebEngineCore.so.5
#11 0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#12 0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#13 0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7ff34df80700 (LWP 1018)):
#0  0x00007ff3a4573f7c in pthread_rwlock_unlock () at /usr/lib/libpthread.so.0
#1  0x00007ff3aed7e550 in __dcigettext () at /usr/lib/libc.so.6
#2  0x00007ff3aedd41cc in strerror_r () at /usr/lib/libc.so.6
#3  0x00007ff3aedd40ef in strerror () at /usr/lib/libc.so.6
#4  0x00007ff38daf82d1 in event_warn () at /usr/lib/libevent-2.1.so.6
#5  0x00007ff38daf9c0c in  () at /usr/lib/libevent-2.1.so.6
#6  0x00007ff38daef8b4 in event_base_loop () at /usr/lib/libevent-2.1.so.6
#7  0x00007ff39773b839 in  () at /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007ff39775aa8b in  () at /usr/lib/libQt5WebEngineCore.so.5
#9  0x00007ff39777d854 in  () at /usr/lib/libQt5WebEngineCore.so.5
#10 0x00007ff3977792a1 in  () at /usr/lib/libQt5WebEngineCore.so.5
#11 0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#12 0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7ff3556ab700 (LWP 972)):
#0  0x00007ff3aee3a00b in poll () at /usr/lib/libc.so.6
#1  0x00007ff3a07a657e in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ff3a07a664c in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3  0x00007ff3af752d7b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7ff350000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007ff3af6ffb0b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ff3556aaca0,
flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#5  0x00007ff3af54ed16 in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:525
#6  0x00007ff3af5588e7 in QThreadPrivate::start(void*) (arg=0x5642c19e1ad0) at
thread/qthread_unix.cpp:367
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7ff365948700 (LWP 958)):
#0  0x00007ff3aee3a00b in poll () at /usr/lib/libc.so.6
#1  0x00007ff3a07a657e in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ff3a07a664c in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3  0x00007ff3af752d7b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7ff35c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007ff3af6ffb0b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ff365947ca0,
flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#5  0x00007ff3af54ed16 in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:525
#6  0x00007ff3af5588e7 in QThreadPrivate::start(void*) (arg=0x5642c1872650) at
thread/qthread_unix.cpp:367
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7ff366149700 (LWP 954)):
#0  0x00007ff3aee3a00b in poll () at /usr/lib/libc.so.6
#1  0x00007ff3a07a657e in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ff3a07a664c in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3  0x00007ff3af752d7b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7ff358000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007ff3af6ffb0b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ff366148ca0,
flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#5  0x00007ff3af54ed16 in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:525
#6  0x00007ff3af5588e7 in QThreadPrivate::start(void*) (arg=0x5642c1850980) at
thread/qthread_unix.cpp:367
#7  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7ff366fd4700 (LWP 953)):
#0  0x00007ff3aee35ae8 in read () at /usr/lib/libc.so.6
#1  0x00007ff3a0756180 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ff3a07a513f in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007ff3a07a6520 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007ff3a07a664c in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#5  0x00007ff3af752d7b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7ff360000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007ff3af6ffb0b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ff366fd3ca0,
flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#7  0x00007ff3af54ed16 in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:525
#8  0x00007ff3af5588e7 in QThreadPrivate::start(void*) (arg=0x5642c1844d90) at
thread/qthread_unix.cpp:367
#9  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7ff374f21700 (LWP 952)):
#0  0x00007ff3a457477d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007ff3769c429b in  () at /usr/lib/dri/nouveau_dri.so
#2  0x00007ff3769c3fc7 in  () at /usr/lib/dri/nouveau_dri.so
#3  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7ff377fff700 (LWP 951)):
#0  0x00007ff3a0755dc9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007ff3a07a6478 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ff3a07a664c in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3  0x00007ff3af752d7b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7ff370000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007ff3af6ffb0b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ff377ffec70,
flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#5  0x00007ff3af54ed16 in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:525
#6  0x00007ff3adb41a35 in QDBusConnectionManager::run() (this=0x7ff3addb9d60
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
qdbusconnection.cpp:178
#7  0x00007ff3af5588e7 in QThreadPrivate::start(void*) (arg=0x7ff3addb9d60
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
thread/qthread_unix.cpp:367
#8  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7ff37e1d2700 (LWP 950)):
#0  0x00007ff3aee3a00b in poll () at /usr/lib/libc.so.6
#1  0x00007ff39fb87922 in  () at /usr/lib/libxcb.so.1
#2  0x00007ff39fb89727 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007ff3802ec7b9 in QXcbEventReader::run() (this=0x5642c16421c0) at
qxcbconnection.h:409
#4  0x00007ff3af5588e7 in QThreadPrivate::start(void*) (arg=0x5642c16421c0) at
thread/qthread_unix.cpp:367
#5  0x00007ff3a456e523 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ff3aee4448f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7ff3b1d4d900 (LWP 948)):
[KCrash Handler]
#6  0x00007ff3aed83d10 in raise () at /usr/lib/libc.so.6
#7  0x00007ff3aed6e99f in abort () at /usr/lib/libc.so.6
#8  0x00007ff3aed6e85f in _nl_load_domain.cold.0 () at /usr/lib/libc.so.6
#9  0x00007ff3aed7c5f2 in  () at /usr/lib/libc.so.6
#10 0x00007ff3757d3bdd in  () at /usr/lib/libdrm_nouveau.so.2
#11 0x00007ff3757d3b96 in nouveau_pushbuf_data () at
/usr/lib/libdrm_nouveau.so.2
#12 0x00007ff3757d3c77 in  () at /usr/lib/libdrm_nouveau.so.2
#13 0x00007ff3757d45ff in  () at /usr/lib/libdrm_nouveau.so.2
#14 0x00007ff3757d55c0 in nouveau_pushbuf_kick () at
/usr/lib/libdrm_nouveau.so.2
#15 0x00007ff3765a0cc6 in  () at /usr/lib/dri/nouveau_dri.so
#16 0x00007ff37680a36e in  () at /usr/lib/dri/nouveau_dri.so
#17 0x00007ff37680a3e0 in  () at /usr/lib/dri/nouveau_dri.so
#18 0x00007ff39e43d02b in  () at /usr/lib/libQt5QuickWidgets.so.5
#19 0x00007ff39e43d196 in  () at /usr/lib/libQt5QuickWidgets.so.5
#20 0x00007ff3af72ab5b in QObject::event(QEvent*) (this=0x5642c1bb4290,
e=<optimized out>) at kernel/qobject.cpp:1232
#21 0x00007ff3b049b8fb in QWidget::event(QEvent*) (this=0x5642c1bb4290,
event=0x7ffe4e3d0880) at kernel/qwidget.cpp:9353
#22 0x00007ff39e440d1d in QQuickWidget::event(QEvent*) () at
/usr/lib/libQt5QuickWidgets.so.5
#23 0x00007ff39cb341d0 in  () at /usr/lib/libQt5WebEngineWidgets.so.5
#24 0x00007ff3b045d161 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
(this=this at entry=0x5642c1620950, receiver=receiver at entry=0x5642c1bb4290,
e=e at entry=0x7ffe4e3d0880) at kernel/qapplication.cpp:3727
#25 0x00007ff3b04647a0 in QApplication::notify(QObject*, QEvent*)
(this=0x7ffe4e3d0fc0, receiver=0x5642c1bb4290, e=0x7ffe4e3d0880) at
kernel/qapplication.cpp:3486
#26 0x00007ff3af700e39 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
(receiver=0x5642c1bb4290, event=0x7ffe4e3d0880) at
../../include/QtCore/5.11.2/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:307
#27 0x00007ff3af752178 in QCoreApplication::sendEvent(QObject*, QEvent*)
(event=0x7ffe4e3d0880, receiver=<optimized out>) at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#28 0x00007ff3af752178 in QTimerInfoList::activateTimers()
(this=0x5642c167dbb0) at kernel/qtimerinfo_unix.cpp:643
#29 0x00007ff3af7529d4 in timerSourceDispatch(GSource*, GSourceFunc, gpointer)
(source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:182
#30 0x00007ff3a07a4abe in g_main_context_dispatch () at
/usr/lib/libglib-2.0.so.0
#31 0x00007ff3a07a6608 in  () at /usr/lib/libglib-2.0.so.0
#32 0x00007ff3a07a664c in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#33 0x00007ff3af752d63 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x5642c1675f40, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#34 0x00007ff38037f081 in
QPAEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x5642c1675f40, flags=...) at qeventdispatcher_glib.cpp:69
#35 0x00007ff3af6ffb0b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ffe4e3d0b00,
flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#36 0x00007ff3af707c82 in QCoreApplication::exec() () at
kernel/qcoreapplication.cpp:1336
#37 0x00005642bf92a80b in main(int, char**) (argc=<optimized out>,
argv=<optimized out>) at /usr/include/qt5/QtCore/qcoreapplication.h:116

Reported using DrKonqi

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