[kmail2] [Bug 408145] New: CRash on selecting folder with unread mail

Christoph Thielecke bugzilla_noreply at kde.org
Fri May 31 14:19:39 BST 2019 

https://bugs.kde.org/show_bug.cgi?id=408145

            Bug ID: 408145
           Summary: CRash on selecting folder with unread mail
           Product: kmail2
           Version: 5.7.3
          Platform: Ubuntu Packages
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: crissi99 at gmx.de
  Target Milestone: ---

Application: kmail (5.7.3)

Qt Version: 5.9.5
Frameworks Version: 5.47.0
Operating System: Linux 4.18.0-17-generic x86_64
Distribution: Ubuntu 18.04.2 LTS

-- Information about the crash:
I opened kmail and i downloaded new mail from POP3 server. Some mail was moved
into sub folder by filter rule. I clicked on that folder and kmail crashed.

-- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f92185e9b80 (LWP 4728))]

Thread 29 (Thread 0x7f90b666c700 (LWP 5643)):
#0  0x00007f920afdeed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f90b666b8c0, expected=0, futex_word=0x7f90a8006df0) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f920afdeed9 in __pthread_cond_wait_common (abstime=0x7f90b666b980,
mutex=0x7f90a8006da0, cond=0x7f90a8006dc8) at pthread_cond_wait.c:533
#2  0x00007f920afdeed9 in __pthread_cond_timedwait (cond=0x7f90a8006dc8,
mutex=0x7f90a8006da0, abstime=0x7f90b666b980) at pthread_cond_wait.c:667
#3  0x00007f9215dee468 in QWaitConditionPrivate::wait_relative(unsigned long)
(time=30000, this=0x7f90a8006da0) at thread/qwaitcondition_unix.cpp:133
#4  0x00007f9215dee468 in QWaitConditionPrivate::wait(unsigned long)
(time=30000, this=0x7f90a8006da0) at thread/qwaitcondition_unix.cpp:141
#5  0x00007f9215dee468 in QWaitCondition::wait(QMutex*, unsigned long)
(this=this at entry=0x7f90a8006ab0, mutex=mutex at entry=0x7f90a8003fb0, time=30000)
at thread/qwaitcondition_unix.cpp:215
#6  0x00007f9215dea53d in QThreadPoolThread::run() (this=0x7f90a8006aa0) at
thread/qthreadpool.cpp:144
#7  0x00007f9215ded17d in QThreadPrivate::start(void*) (arg=0x7f90a8006aa0) at
thread/qthread_unix.cpp:368
#8  0x00007f920afd86db in start_thread (arg=0x7f90b666c700) at
pthread_create.c:463
#9  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7f90b8688700 (LWP 5637)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x564aafdf0b68) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x564aafdf0b18, cond=0x564aafdf0b40) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x564aafdf0b40,
mutex=0x564aafdf0b18) at pthread_cond_wait.c:655
#3  0x00007f91ffe79c95 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe7a177 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe7af11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f920afd86db in start_thread (arg=0x7f90b8688700) at
pthread_create.c:463
#8  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f9139f2f700 (LWP 5636)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f91fc740fb8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f91fc740f68, cond=0x7f91fc740f90) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x7f91fc740f90,
mutex=0x7f91fc740f68) at pthread_cond_wait.c:655
#3  0x00007f91fc44a5f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f91fc44a639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f920afd86db in start_thread (arg=0x7f9139f2f700) at
pthread_create.c:463
#6  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f9141e06700 (LWP 5617)):
#0  0x00007f92156dbbf9 in __GI___poll (fds=0x7f913c001cb0, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f92093825c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92093826dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f92160249bb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f913c000cc0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f9215fc9a1a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this at entry=0x7f9141e05a20, flags=..., flags at entry=...) at
kernel/qeventloop.cpp:212
#5  0x00007f9215de823a in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:515
#6  0x00007f9215ded17d in QThreadPrivate::start(void*) (arg=0x564ab2b4e6a0) at
thread/qthread_unix.cpp:368
#7  0x00007f920afd86db in start_thread (arg=0x7f9141e06700) at
pthread_create.c:463
#8  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f9169ffb700 (LWP 4932)):
#0  0x00007f91f6e63b49 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#1  0x00007f91f6e6546c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007f91f6e5b114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f91ffe4ab0d in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe7b4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f920afd86db in start_thread (arg=0x7f9169ffb700) at
pthread_create.c:463
#9  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f916a7fc700 (LWP 4931)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f916a7fb738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f916a7fb6e8, cond=0x7f916a7fb710) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x7f916a7fb710,
mutex=0x7f916a7fb6e8) at pthread_cond_wait.c:655
#3  0x00007f91ffe6f999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe6f9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe4a4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ffe7b4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f920afd86db in start_thread (arg=0x7f916a7fc700) at
pthread_create.c:463
#11 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f916affd700 (LWP 4930)):
#0  0x00007f91f03fa000 in pa_read () at
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#1  0x00007f91f8deca2e in pa_mainloop_prepare () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f91f8ded4a0 in pa_mainloop_iterate () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f91f8ded560 in pa_mainloop_run () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f91f8dfb3c9 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f91f0429318 in  () at
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#6  0x00007f920afd86db in start_thread (arg=0x7f916affd700) at
pthread_create.c:463
#7  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f916b7fe700 (LWP 4929)):
#0  0x00007f920afdeed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f916b7fd5d0, expected=0, futex_word=0x7f916b7fd758) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f920afdeed9 in __pthread_cond_wait_common (abstime=0x7f916b7fd670,
mutex=0x7f916b7fd708, cond=0x7f916b7fd730) at pthread_cond_wait.c:533
#2  0x00007f920afdeed9 in __pthread_cond_timedwait (cond=0x7f916b7fd730,
mutex=0x7f916b7fd708, abstime=0x7f916b7fd670) at pthread_cond_wait.c:667
#3  0x00007f91ffea8652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe6f91e in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe4a52b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ffe7b4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f920afd86db in start_thread (arg=0x7f916b7fe700) at
pthread_create.c:463
#11 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f916bfff700 (LWP 4928)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x564aafdc4778) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x564aafdc46b8, cond=0x564aafdc4750) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x564aafdc4750,
mutex=0x564aafdc46b8) at pthread_cond_wait.c:655
#3  0x00007f9200601060 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe7af11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f920afd86db in start_thread (arg=0x7f916bfff700) at
pthread_create.c:463
#7  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f9188ff9700 (LWP 4927)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f9188ff8738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f9188ff86e8, cond=0x7f9188ff8710) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x7f9188ff8710,
mutex=0x7f9188ff86e8) at pthread_cond_wait.c:655
#3  0x00007f91ffe6f999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe6f9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe4a4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ffe7b4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f920afd86db in start_thread (arg=0x7f9188ff9700) at
pthread_create.c:463
#11 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f91897fa700 (LWP 4926)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x564aafdf0b68) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x564aafdf0b18, cond=0x564aafdf0b40) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x564aafdf0b40,
mutex=0x564aafdf0b18) at pthread_cond_wait.c:655
#3  0x00007f91ffe79c95 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe7a177 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe7af11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f920afd86db in start_thread (arg=0x7f91897fa700) at
pthread_create.c:463
#8  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f9189ffb700 (LWP 4925)):
#0  0x00007f921567864a in __strlen_sse2 () at
../sysdeps/x86_64/multiarch/../strlen.S:121
#1  0x00007f92156244d3 in _IO_vfprintf_internal (s=s at entry=0x7f9189ff9b10,
format=format at entry=0x7f91f6e7eaed ": %s", ap=ap at entry=0x7f9189ff9cb0) at
vfprintf.c:1643
#2  0x00007f92156f9169 in ___vsnprintf_chk (s=0x7f9189ff9d9a ":
Ung\303\274ltiger Dateideskriptor", maxlen=<optimized out>, flags=1,
slen=<optimized out>, format=0x7f91f6e7eaed ": %s", args=0x7f9189ff9cb0) at
vsnprintf_chk.c:63
#3  0x00007f91f6e603b3 in evutil_vsnprintf () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f91f6e6044f in evutil_snprintf () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f91f6e6395c in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f91f6e63b44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#7  0x00007f91f6e6546c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f91f6e5b114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f91ffe4aab9 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f91ff701978 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f91ff701f2b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f91ffe7b588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f920afd86db in start_thread (arg=0x7f9189ffb700) at
pthread_create.c:463
#17 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f918a7fc700 (LWP 4924)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f918a7fb358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f918a7fb308, cond=0x7f918a7fb330) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x7f918a7fb330,
mutex=0x7f918a7fb308) at pthread_cond_wait.c:655
#3  0x00007f91ffe6f999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe6f9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe4a4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ff7018c8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ff701f1b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f91ffe7b588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f920afd86db in start_thread (arg=0x7f918a7fc700) at
pthread_create.c:463
#13 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f918affd700 (LWP 4923)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f918affc358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f918affc308, cond=0x7f918affc330) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x7f918affc330,
mutex=0x7f918affc308) at pthread_cond_wait.c:655
#3  0x00007f91ffe6f999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe6f9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe4a4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ff701818 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ff701f0b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f91ffe7b588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f920afd86db in start_thread (arg=0x7f918affd700) at
pthread_create.c:463
#13 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f918b7fe700 (LWP 4922)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f918b7fd358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f918b7fd308, cond=0x7f918b7fd330) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x7f918b7fd330,
mutex=0x7f918b7fd308) at pthread_cond_wait.c:655
#3  0x00007f91ffe6f999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe6f9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe4a4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ff701768 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ff701efb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f91ffe7b588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f920afd86db in start_thread (arg=0x7f918b7fe700) at
pthread_create.c:463
#13 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f918bfff700 (LWP 4921)):
#0  0x00007f92156f76ac in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f92156f9474 in ___fprintf_chk (fp=0x7f92159b48b0
<_IO_stdfile_2_lock>, flag=1, format=0x7f91f6e7b6a8 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007f91f6e639ad in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f91f6e63b44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f91f6e6546c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f91f6e5b114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f91ffe4ab0d in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ff7016b8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f91ff701eeb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f91ffe7b588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f920afd86db in start_thread (arg=0x7f918bfff700) at
pthread_create.c:463
#14 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f91acb7e700 (LWP 4920)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f91acb7d358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f91acb7d308, cond=0x7f91acb7d330) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x7f91acb7d330,
mutex=0x7f91acb7d308) at pthread_cond_wait.c:655
#3  0x00007f91ffe6f999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe6f9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe4a4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ff701608 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ff701edb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f91ffe7b588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f920afd86db in start_thread (arg=0x7f91acb7e700) at
pthread_create.c:463
#13 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f91ad37f700 (LWP 4909)):
#0  0x00007f920afdeed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f91ad37e7e0, expected=0, futex_word=0x7f91a0004664) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f920afdeed9 in __pthread_cond_wait_common (abstime=0x7f91ad37e880,
mutex=0x7f91a0004610, cond=0x7f91a0004638) at pthread_cond_wait.c:533
#2  0x00007f920afdeed9 in __pthread_cond_timedwait (cond=0x7f91a0004638,
mutex=0x7f91a0004610, abstime=0x7f91ad37e880) at pthread_cond_wait.c:667
#3  0x00007f91ffea8652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe7e799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe7ecfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f920afd86db in start_thread (arg=0x7f91ad37f700) at
pthread_create.c:463
#8  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f91adb80700 (LWP 4908)):
#0  0x00007f920afdeed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f91adb7f7e0, expected=0, futex_word=0x7f91a0004660) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f920afdeed9 in __pthread_cond_wait_common (abstime=0x7f91adb7f880,
mutex=0x7f91a0004610, cond=0x7f91a0004638) at pthread_cond_wait.c:533
#2  0x00007f920afdeed9 in __pthread_cond_timedwait (cond=0x7f91a0004638,
mutex=0x7f91a0004610, abstime=0x7f91adb7f880) at pthread_cond_wait.c:667
#3  0x00007f91ffea8652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe7e799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe7ecfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f920afd86db in start_thread (arg=0x7f91adb80700) at
pthread_create.c:463
#8  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f91ae381700 (LWP 4907)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f91ae380738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f91ae3806e8, cond=0x7f91ae380710) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x7f91ae380710,
mutex=0x7f91ae3806e8) at pthread_cond_wait.c:655
#3  0x00007f91ffe6f999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f91ffe6f9c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f91ffe4a4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ffe7b4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f920afd86db in start_thread (arg=0x7f91ae381700) at
pthread_create.c:463
#11 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f91aeb82700 (LWP 4906)):
#0  0x00007f92156f76ac in __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f92156f9474 in ___fprintf_chk (fp=0x7f92159b48b0
<_IO_stdfile_2_lock>, flag=1, format=0x7f91f6e7b6a8 "[%s] %s\n") at
fprintf_chk.c:30
#2  0x00007f91f6e639ad in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f91f6e63b44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f91f6e6546c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f91f6e5b114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f91ffe4aab9 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f91ffe46da8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f91ffe6377b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f91ffe7b4d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f91ffe775eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f920afd86db in start_thread (arg=0x7f91aeb82700) at
pthread_create.c:463
#12 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f91b8c52700 (LWP 4884)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x564aafd85160) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x564aafd85110, cond=0x564aafd85138) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x564aafd85138,
mutex=0x564aafd85110) at pthread_cond_wait.c:655
#3  0x00007f9215dee5ab in QWaitConditionPrivate::wait(unsigned long)
(time=18446744073709551615, this=0x564aafd85110) at
thread/qwaitcondition_unix.cpp:143
#4  0x00007f9215dee5ab in QWaitCondition::wait(QMutex*, unsigned long)
(this=this at entry=0x564aafd430d8, mutex=mutex at entry=0x564aafd430d0,
time=time at entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#5  0x00007f9215de6c1b in QSemaphore::acquire(int) (this=0x564aafd76dd8, n=1)
at thread/qsemaphore.cpp:143
#6  0x00007f91b9c8980c in  () at
/usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#7  0x00007f9215ded17d in QThreadPrivate::start(void*) (arg=0x564aafd76da0) at
thread/qthread_unix.cpp:368
#8  0x00007f920afd86db in start_thread (arg=0x7f91b8c52700) at
pthread_create.c:463
#9  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f91bab35700 (LWP 4878)):
#0  0x00007f92156d70b4 in __GI___libc_read (fd=18, buf=0x7f91bab34810,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f92093c72d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92093820b7 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9209382570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f92093826dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f92160249bb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f91b0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f9215fc9a1a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this at entry=0x7f91bab34a20, flags=..., flags at entry=...) at
kernel/qeventloop.cpp:212
#7  0x00007f9215de823a in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:515
#8  0x00007f9215ded17d in QThreadPrivate::start(void*) (arg=0x564aafdf1e70) at
thread/qthread_unix.cpp:368
#9  0x00007f920afd86db in start_thread (arg=0x7f91bab35700) at
pthread_create.c:463
#10 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f91c37fe700 (LWP 4857)):
#0  0x00007f92184aaa08 in __tls_get_addr () at
../sysdeps/x86_64/tls_get_addr.S:38
#1  0x00007f9215dec006 in get_thread_data () at thread/qthread_unix.cpp:189
#2  0x00007f9215dec006 in QThreadData::current(bool)
(createIfNecessary=createIfNecessary at entry=true) at thread/qthread_unix.cpp:244
#3  0x00007f9216024db1 in postEventSourcePrepare (timeout=0x0,
s=0x7f91b4004ba0) at kernel/qeventdispatcher_glib.cpp:252
#4  0x00007f9216024db1 in postEventSourceCheck(GSource*)
(source=0x7f91b4004ba0) at kernel/qeventdispatcher_glib.cpp:269
#5  0x00007f9209381fe1 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f9209382570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f92093826dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f92160249bb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f91b4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#9  0x00007f9215fc9a1a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this at entry=0x7f91c37fda20, flags=..., flags at entry=...) at
kernel/qeventloop.cpp:212
#10 0x00007f9215de823a in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:515
#11 0x00007f9215ded17d in QThreadPrivate::start(void*) (arg=0x564aafb89bb0) at
thread/qthread_unix.cpp:368
#12 0x00007f920afd86db in start_thread (arg=0x7f91c37fe700) at
pthread_create.c:463
#13 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f91c3fff700 (LWP 4856)):
#0  0x00007f92156d7077 in __GI___libc_read (fd=14, buf=0x7f91c3ffe810,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f92093c72d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92093820b7 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9209382570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f92093826dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f92160249bb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f91bc000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f9215fc9a1a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this at entry=0x7f91c3ffea20, flags=..., flags at entry=...) at
kernel/qeventloop.cpp:212
#7  0x00007f9215de823a in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:515
#8  0x00007f9215ded17d in QThreadPrivate::start(void*) (arg=0x564aafb43060) at
thread/qthread_unix.cpp:368
#9  0x00007f920afd86db in start_thread (arg=0x7f91c3fff700) at
pthread_create.c:463
#10 0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f91d1592700 (LWP 4837)):
#0  0x00007f92093c8664 in g_mutex_unlock () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9209381b18 in g_main_context_prepare () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92093824fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f92093826dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f92160249bb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f91c8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f9215fc9a1a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this at entry=0x7f91d1591a20, flags=..., flags at entry=...) at
kernel/qeventloop.cpp:212
#6  0x00007f9215de823a in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:515
#7  0x00007f9215ded17d in QThreadPrivate::start(void*) (arg=0x564aafb40360) at
thread/qthread_unix.cpp:368
#8  0x00007f920afd86db in start_thread (arg=0x7f91d1592700) at
pthread_create.c:463
#9  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f91d27a3700 (LWP 4805)):
#0  0x00007f92156dbbf9 in __GI___poll (fds=0x7f91c4024a10, nfds=1,
timeout=10024) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f92093825c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92093826dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f92160249bb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f91c4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f9215fc9a1a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this at entry=0x7f91d27a29f0, flags=..., flags at entry=...) at
kernel/qeventloop.cpp:212
#5  0x00007f9215de823a in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:515
#6  0x00007f921461fd45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f9215ded17d in QThreadPrivate::start(void*) (arg=0x7f9214892d60) at
thread/qthread_unix.cpp:368
#8  0x00007f920afd86db in start_thread (arg=0x7f91d27a3700) at
pthread_create.c:463
#9  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f91d3484700 (LWP 4803)):
#0  0x00007f920afde9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x564aaf977758) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f920afde9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x564aaf977708, cond=0x564aaf977730) at pthread_cond_wait.c:502
#2  0x00007f920afde9f3 in __pthread_cond_wait (cond=0x564aaf977730,
mutex=0x564aaf977708) at pthread_cond_wait.c:655
#3  0x00007f91dccf9e6b in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007f91dccf9b97 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#5  0x00007f920afd86db in start_thread (arg=0x7f91d3484700) at
pthread_create.c:463
#6  0x00007f92156e888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f92185e9b80 (LWP 4728)):
[KCrash Handler]
#6  0x00007f91dc582396 in  () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#7  0x00007f91dc5827dd in  () at /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#8  0x00007f91dcfd86d1 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#9  0x00007f91dcfd8807 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#10 0x00007f91dcfdaa81 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#11 0x00007f91dcbf5629 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#12 0x00007f9206ba1f88 in QSGBatchRenderer::Renderer::renderBatches() () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007f9206ba785e in QSGBatchRenderer::Renderer::render() () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007f9206b982a0 in QSGRenderer::renderScene(QSGBindable const&) () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f9206b98787 in QSGRenderer::renderScene(unsigned int) () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f9206bd2af0 in
QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007f9206c30b68 in QQuickWindowPrivate::renderSceneGraph(QSize const&)
() at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007f9206cea1d8 in QQuickRenderControl::render() () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007f920729dd2e in  () at
/usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#20 0x00007f920729df72 in  () at
/usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#21 0x00007f9215ffb18b in QObject::event(QEvent*) (this=0x564aafeefc70,
e=<optimized out>) at kernel/qobject.cpp:1269
#22 0x00007f9216d8875b in QWidget::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f92072a19eb in QQuickWidget::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#24 0x00007f9205befb1b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
#25 0x00007f9216d4983c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007f9216d51104 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f9215fcb9e8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
(receiver=0x564aafeefc70, event=event at entry=0x7fff7258c5e0) at
kernel/qcoreapplication.cpp:1024
#28 0x00007f9216023e3e in QCoreApplication::sendEvent(QObject*, QEvent*)
(event=0x7fff7258c5e0, receiver=<optimized out>) at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#29 0x00007f9216023e3e in QTimerInfoList::activateTimers()
(this=0x564aaf973970) at kernel/qtimerinfo_unix.cpp:643
#30 0x00007f9216024601 in timerSourceDispatch(GSource*, GSourceFunc, gpointer)
(source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:182
#31 0x00007f9209382417 in g_main_context_dispatch () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f9209382650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f92093826dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f921602499f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x564aaf994450, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#35 0x00007f9215fc9a1a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this at entry=0x7fff7258c830, flags=..., flags at entry=...) at
kernel/qeventloop.cpp:212
#36 0x00007f9215fd2ac4 in QCoreApplication::exec() () at
kernel/qcoreapplication.cpp:1297
#37 0x0000564aaf6ad7cd in  ()
#38 0x00007f92155e8b97 in __libc_start_main (main=0x564aaf6ac840, argc=3,
argv=0x7fff7258cf28, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fff7258cf18) at ../csu/libc-start.c:310
#39 0x0000564aaf6ad8fa in _start ()

Reported using DrKonqi

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