Bug 447209

Summary: Falkon stops responding to mouse clicks and crashes when exiting with ctrl + q.
Product: [Applications] Falkon Reporter: Nikita <presnovnikita>
Component: generalAssignee: David Rosca <nowrep>
Status: REPORTED ---    
Severity: crash Keywords: drkonqi
Priority: NOR    
Version: 3.1.0   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Nikita 2021-12-18 21:34:51 UTC 
Application: falkon (3.1.0)

Qt Version: 5.15.3
Frameworks Version: 5.89.0
Operating System: Linux 5.11.0-43-generic x86_64
Windowing System: X11
Distribution: KDE neon User - Plasma 25th Anniversary Edition
DrKonqi: 5.23.4 [KCrashBackend]

-- Information about the crash:
DE stops responding to mouse clicks. Restarting kwin didn't help. Everything returned to normal when the browser was closed. 
Sometimes I notice a similar behavior of the DE when working with other programs, including browsers such as firefox.

The reporter is unsure if this crash is reproducible.

-- Backtrace:
Application: Falkon (falkon), signal: Segmentation fault

[New LWP 41121]
[New LWP 41122]
[New LWP 41123]
[New LWP 41124]
[New LWP 41125]
[New LWP 41126]
[New LWP 41127]
[New LWP 41133]
[New LWP 41134]
[New LWP 41136]
[New LWP 41140]
[New LWP 41141]
[New LWP 41142]
[New LWP 41143]
[New LWP 41144]
[New LWP 41145]
[New LWP 41146]
[New LWP 41151]
[New LWP 41157]
[New LWP 41161]
[New LWP 41176]
[New LWP 41183]
[New LWP 41209]
[New LWP 42232]
[New LWP 42247]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007fdc68528aff in __GI___poll (fds=0x7ffe7e42ef38, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
__preamble__
[Current thread is 1 (Thread 0x7fdc546c2200 (LWP 41119))]

Thread 26 (Thread 0x7fdb7d7ff700 (LWP 42247)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7fdb7d7fe0b0, clockid=<optimized out>, expected=0, futex_word=0x7fdb7d7fe288) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7fdb7d7fe0b0, clockid=<optimized out>, mutex=0x7fdb7d7fe238, cond=0x7fdb7d7fe260) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x7fdb7d7fe260, mutex=0x7fdb7d7fe238, abstime=0x7fdb7d7fe0b0) at pthread_cond_wait.c:656
#3  0x00007fdc62a3c20a in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x000000000000f298 in  ()
#5  0x000000002bcf12bf in  ()
#6  0x000000000000f277 in  ()
#7  0x000000002bcf12bf in  ()
#8  0x00007fdc14bf0db8 in  ()
#9  0x00007fdc62a4ee81 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x0000000000000000 in  ()

Thread 25 (Thread 0x7fdb71acf700 (LWP 42232)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7fdb71ace0b0, clockid=<optimized out>, expected=0, futex_word=0x7fdb71ace288) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7fdb71ace0b0, clockid=<optimized out>, mutex=0x7fdb71ace238, cond=0x7fdb71ace260) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x7fdb71ace260, mutex=0x7fdb71ace238, abstime=0x7fdb71ace0b0) at pthread_cond_wait.c:656
#3  0x00007fdc62a3c20a in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x000000000000f298 in  ()
#5  0x000000002bcd8f92 in  ()
#6  0x000000000000f277 in  ()
#7  0x000000002bcd8f92 in  ()
#8  0x00007fdc14608dd8 in  ()
#9  0x00007fdc62a14064 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x0000000000000000 in  ()

Thread 24 (Thread 0x7fdbb1afe700 (LWP 41209)):
#0  0x00007fdc685355ce in epoll_wait (epfd=112, events=0x7fdba0002020, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fdc5d9f35e9 in  () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#2  0x00007fdc5d9e9625 in event_base_loop () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#3  0x00007fdc62a4b947 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdba0002710 in  ()
#5  0x0001000000000000 in  ()
#6  0x00007fdbb1afd220 in  ()
#7  0x00007fdbb1afd218 in  ()
#8  0x00007fdbb1afd2d8 in  ()
#9  0x00000000015cbc27 in  ()
#10 0x0000000000000016 in  ()
#11 0x00000000000d0aa7 in  ()
#12 0x0000000000000008 in  ()
#13 0x00007fdc14099070 in  ()
#14 0x7fffffffffffffff in  ()
#15 0x0000000000000001 in  ()
#16 0x7fffffffffffffff in  ()
#17 0x00007fdbb1afd370 in  ()
#18 0x00007fdbb1afd290 in  ()
#19 0x00007fdc62a0269c in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x0000000000000000 in  ()

Thread 23 (Thread 0x7fdbbce68700 (LWP 41183)):
#0  0x00007fdc68528aff in __GI___poll (fds=0x7fdbac004a60, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdc5e2a436e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fdc5e2a44a3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdc68af661b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fdc68a9a8ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fdc688b42c2 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fdc688b545c in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fdc683f1609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007fdc68535293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fdbc4c27700 (LWP 41176)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdbc4c26268) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdbc4c26218, cond=0x7fdbc4c26240) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdbc4c26240, mutex=0x7fdbc4c26218) at pthread_cond_wait.c:638
#3  0x00007fdc62a3c0ab in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdbc4c260c0 in  ()
#5  0x00007fdc62a3158f in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x0000563e2377ea10 in  ()
#7  0x00007fdbc4c260e8 in  ()
#8  0x0000000000000000 in  ()

Thread 21 (Thread 0x7fdbe27fc700 (LWP 41161)):
#0  0x00007fdc685355ce in epoll_wait (epfd=65, events=0x7fdbcc002020, maxevents=32, timeout=30000) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fdc5d9f35e9 in  () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#2  0x00007fdc5d9e9625 in event_base_loop () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#3  0x00007fdc62a4b918 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdbcc002710 in  ()
#5  0x0001000000000000 in  ()
#6  0x00007fdbe27fb220 in  ()
#7  0x00007fdbe27fb218 in  ()
#8  0x00007fdbe27fb2d8 in  ()
#9  0x0000000001c9c34d in  ()
#10 0x000000000000001d in  ()
#11 0x00000000000f420d in  ()
#12 0x0000000000000008 in  ()
#13 0x00007fdc14049870 in  ()
#14 0x7fffffffffffffff in  ()
#15 0x0000000000000001 in  ()
#16 0x7fffffffffffffff in  ()
#17 0x00007fdbe27fb370 in  ()
#18 0x00007fdbe27fb290 in  ()
#19 0x00007fdc62a0269c in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x0000000000000000 in  ()

Thread 20 (Thread 0x7fdbe2ffd700 (LWP 41157)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdbe2ffc188) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdbe2ffc138, cond=0x7fdbe2ffc160) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdbe2ffc160, mutex=0x7fdbe2ffc138) at pthread_cond_wait.c:638
#3  0x00007fdc62a3c0ab in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x0000000000000000 in  ()

Thread 19 (Thread 0x7fdbe37fe700 (LWP 41151)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdbe37fd268) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdbe37fd218, cond=0x7fdbe37fd240) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdbe37fd240, mutex=0x7fdbe37fd218) at pthread_cond_wait.c:638
#3  0x00007fdc62a3c0ab in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdbe37fd0c0 in  ()
#5  0x00007fdc62a3158f in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fdc1403c350 in  ()
#7  0x00007fdbe37fd0e8 in  ()
#8  0x0000000000000000 in  ()

Thread 18 (Thread 0x7fdc127fc700 (LWP 41146)):
#0  0x00007fdc68528aff in __GI___poll (fds=0x7fdbe4004a60, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdc5e2a436e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fdc5e2a44a3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdc68af6602 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fdc68a9a8ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fdc688b42c2 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fdc688b545c in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fdc683f1609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007fdc68535293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fdc12ffd700 (LWP 41145)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdc12ffb428) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdc12ffb3d8, cond=0x7fdc12ffb400) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdc12ffb400, mutex=0x7fdc12ffb3d8) at pthread_cond_wait.c:638
#3  0x00007fdc62a3c0ab in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdc6732aad1 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fdc67563b88 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x000712440000004a in  ()
#7  0x00007fdc62a3c0e6 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x0000000000000001 in  ()
#9  0x0000000000000000 in  ()

Thread 16 (Thread 0x7fdc137fe700 (LWP 41144)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdc137fd188) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdc137fd138, cond=0x7fdc137fd160) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdc137fd160, mutex=0x7fdc137fd138) at pthread_cond_wait.c:638
#3  0x00007fdc62a3c0ab in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x0000000000000000 in  ()

Thread 15 (Thread 0x7fdc13fff700 (LWP 41143)):
#0  0x00007fdc685355ce in epoll_wait (epfd=40, events=0x7fdbf8002020, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fdc5d9f35e9 in  () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#2  0x00007fdc5d9e9625 in event_base_loop () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#3  0x00007fdc62a4b947 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdbf8002510 in  ()
#5  0x0001000000000000 in  ()
#6  0x00007fdc13ffe220 in  ()
#7  0x00007fdc13ffe218 in  ()
#8  0x00007fdc13ffe2d8 in  ()
#9  0x00007fdbf8002510 in  ()
#10 0x00007fdc13ffe370 in  ()
#11 0x00007fdc684b0419 in __GI___libc_malloc (bytes=140583205069408) at malloc.c:3066
#12 0x0000000000000001 in  ()
#13 0x7fffffffffffffff in  ()
#14 0x00007fdc13ffe370 in  ()
#15 0x00007fdc13ffe290 in  ()
#16 0x00007fdc62a0269c in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x0000000000000000 in  ()

Thread 14 (Thread 0x7fdc1cff9700 (LWP 41142)):
#0  0x00007fdc68528aff in __GI___poll (fds=0x7fdc1cff7448, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdc67fc4c1a in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fdc67fc5329 in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fdc67fc55b7 in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007fdc67fc5e20 in xcb_flush () at /lib/x86_64-linux-gnu/libxcb.so.1
#5  0x00007fdc51f7a66f in glPrimitiveBoundingBox () at /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#6  0x00007fdc51f7b712 in glPrimitiveBoundingBox () at /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#7  0x00007fdc504ca4f3 in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#8  0x00007fdc504cc624 in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#9  0x00007fdc5052649c in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#10 0x00007fdc50526759 in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#11 0x00007fdc504cbf51 in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#12 0x00007fdc50a9543a in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#13 0x00007fdc51f6e00a in  () at /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#14 0x00007fdc51f5e01f in  () at /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#15 0x00007fdc5516eec2 in  () at /lib/x86_64-linux-gnu/libGLX.so.0
#16 0x00007fdc5516f467 in  () at /lib/x86_64-linux-gnu/libGLX.so.0
#17 0x00007fdc55170c58 in  () at /lib/x86_64-linux-gnu/libGLX.so.0
#18 0x00007fdc62fde33a in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#19 0x00007fdc1cff7bc0 in  ()
#20 0x00007fdc62fd3370 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#21 0x00007fdbf4092c90 in  ()
#22 0x000000000160001d in  ()
#23 0x00007fdbf5e2eca0 in  ()
#24 0x0000563e21047b20 in  ()
#25 0x00007fdc1cff7bf0 in  ()
#26 0x00007fdbf60dc1ec in  ()
#27 0x0000000000000001 in  ()
#28 0x00007fdc684f3235 in __GI___clock_gettime (clock_id=486505872, tp=0x7fdbf4005350) at ../sysdeps/unix/sysv/linux/clock_gettime.c:38
#29 0x0000563e2829882c in  ()
#30 0x0000000000000001 in  ()
#31 0x00007fdc684f3235 in __GI___clock_gettime (clock_id=553941792, tp=0x7fdc1cff7c20) at ../sysdeps/unix/sysv/linux/clock_gettime.c:38
#32 0x00007fdc684ad00b in _int_free (av=0x7fdc1cff7c70, p=0x563e21047b20, have_lock=<optimized out>) at malloc.c:4342
#33 0x00007fdc505c1aad in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#34 0x00007fdc1cff7d90 in  ()
#35 0x0000000000000000 in  ()

Thread 13 (Thread 0x7fdc1d7fa700 (LWP 41141)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x563e212abfb8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x563e212abef8, cond=0x563e212abf90) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x563e212abf90, mutex=0x563e212abef8) at pthread_cond_wait.c:638
#3  0x00007fdc62a3c0ab in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdc00000b60 in  ()
#5  0x0000563e280e97e8 in  ()
#6  0x00007fdc1d7f93c0 in  ()
#7  0x00007fdc62a237c1 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x0000000000000000 in  ()

Thread 12 (Thread 0x7fdc1dffb700 (LWP 41140)):
#0  0x00007fdc6852b12b in __GI___select (nfds=38, readfds=0x7fdc1dffa320, writefds=0x0, exceptfds=0x0, timeout=0x0) at ../sysdeps/unix/sysv/linux/select.c:41
#1  0x00007fdc62a41d94 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x0000000000000030 in  ()
#3  0x00007fdc67e78d70 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdc1dffa320 in  ()
#5  0x00007fdc1dffa3a0 in  ()
#6  0x0000000000000020 in  ()
#7  0x00007fdc1dffa3b0 in  ()
#8  0x00007fdbfc000bf0 in  ()
#9  0x00007fdc1dffa300 in  ()
#10 0x00007fdc1dffa2f8 in  ()
#11 0x00007fdc18003798 in  ()
#12 0x0000000000000010 in  ()
#13 0x0000000000000010 in  ()
#14 0x000000db00000002 in  ()
#15 0x00007fdc67e78d08 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x0000002000000030 in  ()
#17 0x0000000000000000 in  ()

Thread 11 (Thread 0x7fdc1ffff700 (LWP 41136)):
#0  0x00007fdc685355ce in epoll_wait (epfd=31, events=0x7fdc14002000, maxevents=32, timeout=405178) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fdc5d9f35e9 in  () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#2  0x00007fdc5d9e9625 in event_base_loop () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#3  0x00007fdc62a4b918 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdc1fffe310 in  ()
#5  0x0001000000000000 in  ()
#6  0x00007fdc1fffe1e0 in  ()
#7  0x00007fdc1fffe1d8 in  ()
#8  0x00007fdc1fffe298 in  ()
#9  0x000000001f599731 in  ()
#10 0x000000000000020d in  ()
#11 0x00000000000eb9f1 in  ()
#12 0x0000000000000008 in  ()
#13 0x0000563e212ccf40 in  ()
#14 0x7fffffffffffffff in  ()
#15 0x0000000000000001 in  ()
#16 0x7fffffffffffffff in  ()
#17 0x00007fdc1fffe370 in  ()
#18 0x00007fdc1fffe250 in  ()
#19 0x00007fdc62a0269c in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x0000000000000000 in  ()

Thread 10 (Thread 0x7fdc3d046700 (LWP 41134)):
#0  0x00007fdc685355ce in epoll_wait (epfd=26, events=0x7fdc24002020, maxevents=32, timeout=324627) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fdc5d9f35e9 in  () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#2  0x00007fdc5d9e9625 in event_base_loop () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#3  0x00007fdc62a4b918 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fdc24002410 in  ()
#5  0x0001000000000000 in  ()
#6  0x00007fdc3d045200 in  ()
#7  0x00007fdc3d0451f8 in  ()
#8  0x00007fdc3d0452b8 in  ()
#9  0x00000000135966c9 in  ()
#10 0x0000000000000144 in  ()
#11 0x0000000000098dc9 in  ()
#12 0x00007fdc67e76d20 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x0000563e21275830 in  ()
#14 0x7fffffffffffffff in  ()
#15 0x0000000000000001 in  ()
#16 0x7fffffffffffffff in  ()
#17 0x00007fdc3d045370 in  ()
#18 0x00007fdc3d045270 in  ()
#19 0x00007fdc62a0269c in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x0000000000000000 in  ()

Thread 9 (Thread 0x7fdc3e3e3700 (LWP 41133)):
#0  0x00007fdc684f8dff in __GI___wait4 (pid=41130, stat_loc=0x7fdc3e3e238c, options=0, usage=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:27
#1  0x00007fdc62a3b60b in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fdc2c001d20 in  ()
#3  0x00007fdc2c001c90 in  ()
#4  0x0000000000000000 in  ()

Thread 8 (Thread 0x7fdc3ebe4700 (LWP 41127)):
#0  0x00007fdc68528aff in __GI___poll (fds=0x7fdc3ebe3210, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdc654ea1da in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x0000000100000016 in  ()
#3  0x0000000100000015 in  ()
#4  0x00007fdc3ebe3200 in  ()
#5  0x00007fdc687483a4 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_mutate(unsigned long, unsigned long, char const*, unsigned long) () at /lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007fdc00000005 in  ()
#7  0x00007fdc3ebe3370 in  ()
#8  0x00007fdc62a43afe in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x0000000000000001 in  ()
#10 0x0000003100000005 in  ()
#11 0x0000000000000000 in  ()

Thread 7 (Thread 0x7fdc44fae700 (LWP 41126)):
#0  0x00007fdc68528aff in __GI___poll (fds=0x7fdc2802af50, nfds=4, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdc5e2a436e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fdc5e2a44a3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdc68af6602 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fdc68a9a8ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fdc688b42c2 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fdc67f2cf4b in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fdc688b545c in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fdc683f1609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fdc68535293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fdc45847700 (LWP 41125)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdc4c0065cc) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdc4c006578, cond=0x7fdc4c0065a0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdc4c0065a0, mutex=0x7fdc4c006578) at pthread_cond_wait.c:638
#3  0x00007fdc504d2e7b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fdc504d2a7b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fdc683f1609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fdc68535293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fdc3d847700 (LWP 41124)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdc4c0065cc) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdc4c006578, cond=0x7fdc4c0065a0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdc4c0065a0, mutex=0x7fdc4c006578) at pthread_cond_wait.c:638
#3  0x00007fdc504d2e7b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fdc504d2a7b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fdc683f1609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fdc68535293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fdc46048700 (LWP 41123)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdc4c0065cc) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdc4c006578, cond=0x7fdc4c0065a0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdc4c0065a0, mutex=0x7fdc4c006578) at pthread_cond_wait.c:638
#3  0x00007fdc504d2e7b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fdc504d2a7b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fdc683f1609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fdc68535293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fdc46849700 (LWP 41122)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdc4c0065cc) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fdc4c006578, cond=0x7fdc4c0065a0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fdc4c0065a0, mutex=0x7fdc4c006578) at pthread_cond_wait.c:638
#3  0x00007fdc504d2e7b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fdc504d2a7b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fdc683f1609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fdc68535293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fdc53d29700 (LWP 41121)):
#0  0x00007fdc68528aff in __GI___poll (fds=0x7fdc53d282a8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdc67fc4c1a in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fdc67fc690a in xcb_wait_for_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fdc54281e88 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fdc688b545c in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fdc683f1609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fdc68535293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fdc546c2200 (LWP 41119)):
[KCrash Handler]
#4  0x0000000000000000 in  ()
#5  0x00007fdc1c136fd5 in AutoScroller::~AutoScroller() (this=0x563e23349a70, __in_chrg=<optimized out>) at ./src/plugins/AutoScroll/autoscroller.cpp:101
#6  0x00007fdc1c13702d in AutoScroller::~AutoScroller() (this=0x563e23349a70, __in_chrg=<optimized out>) at ./src/plugins/AutoScroll/autoscroller.cpp:99
#7  0x00007fdc68ac96e3 in QObject::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fdc68eacdc3 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007fdc68eb5bb8 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007fdc68a9bdaa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fdc68a9e6b1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fdc68aa2a7c in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x0000563e1ef14ee9 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./src/main/main.cpp:155
[Inferior 1 (process 41119) detached]

Possible duplicates by query: bug 430007, bug 424655, bug 423234, bug 421299, bug 420973.

Reported using DrKonqi