Application: kmail (5.1.3)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-28-generic x86_64
Distribution: Ubuntu 16.04 LTS

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

1. Imported some old mail  (some was kmail, some was old dir tree, and some was mbox ... all imported)
2. click on non-empty imported folder
3. drag to "inbox"
4. kmail crash, segmentation violation
5. restart kmail
6. directory that was indicated shows in correct place now

repeat 1 .. 4
insert "report crash"
5 and 6 also consistent still

The crash can be reproduced every time.

-- 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 0x7fae672aa940 (LWP 10963))]

Thread 23 (Thread 0x7fadc24a8700 (LWP 11082)):
#0  0x00007fae7ca81248 in g_main_context_iterate (context=context@entry=0x7fadb8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3788
#1  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fadb8000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#2  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae7cfa26fa in start_thread (arg=0x7fadc24a8700) at pthread_create.c:333
#7  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7fadc2ca9700 (LWP 11076)):
#0  0x00007fae7cac5ac9 in g_mutex_lock (mutex=mutex@entry=0x7fadb4000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gthread-posix.c:1335
#1  0x00007fae7ca812a0 in g_main_context_iterate (context=context@entry=0x7fadb4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3807
#2  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fadb4000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#3  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae7cfa26fa in start_thread (arg=0x7fadc2ca9700) at pthread_create.c:333
#8  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7fadc3fff700 (LWP 11054)):
#0  0x00007fae7cac5ae4 in g_mutex_unlock (mutex=0x7fadbc000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gthread-posix.c:1347
#1  0x00007fae7ca81356 in g_main_context_iterate (context=context@entry=0x7fadbc000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3842
#2  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fadbc000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#3  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae7cfa26fa in start_thread (arg=0x7fadc3fff700) at pthread_create.c:333
#8  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7fade53fa700 (LWP 11039)):
#0  0x00007fae7cac5ac9 in g_mutex_lock (mutex=mutex@entry=0x7fadc8000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gthread-posix.c:1335
#1  0x00007fae7ca80f26 in g_main_context_dispatch (context=context@entry=0x7fadc8000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3765
#2  0x00007fae7ca81400 in g_main_context_iterate (context=context@entry=0x7fadc8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3840
#3  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fadc8000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae7cfa26fa in start_thread (arg=0x7fade53fa700) at pthread_create.c:333
#9  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7fade5ffb700 (LWP 11026)):
#0  0x00007fae7cfa83a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fae77e9eaa3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fae781bf541 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fae7cfa26fa in start_thread (arg=0x7fade5ffb700) at pthread_create.c:333
#4  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7fade67fc700 (LWP 11025)):
#0  0x00007fae7cfa83a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fae77e9eaa3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fae781bf541 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fae7cfa26fa in start_thread (arg=0x7fade67fc700) at pthread_create.c:333
#4  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7fade6ffd700 (LWP 11024)):
#0  0x00007fae7cfa83a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fae77e9eaa3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fae781bf541 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fae7cfa26fa in start_thread (arg=0x7fade6ffd700) at pthread_create.c:333
#4  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7fade77fe700 (LWP 11023)):
#0  0x00007fae7cfa83a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fae77e9eaa3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fae781bf541 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fae7cfa26fa in start_thread (arg=0x7fade77fe700) at pthread_create.c:333
#4  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7fade7fff700 (LWP 11022)):
#0  0x00007fae7cfa83a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fae77e9eaa3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fae781bf541 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fae7cfa26fa in start_thread (arg=0x7fade7fff700) at pthread_create.c:333
#4  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7fadf4880700 (LWP 11021)):
#0  0x00007fae7cfa83a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fae77e9eaa3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fae781bf541 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fae7cfa26fa in start_thread (arg=0x7fadf4880700) at pthread_create.c:333
#4  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7fadf50a0700 (LWP 11020)):
#0  0x00007fae7cfa83a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fae77e9da74 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fae781bf541 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fae7cfa26fa in start_thread (arg=0x7fadf50a0700) at pthread_create.c:333
#4  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7fadf68e9700 (LWP 11015)):
#0  0x00007fae863569cd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fae7cac4740 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7fadf68e8a80, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007fae7cac4740 in g_wakeup_acknowledge (wakeup=0x7fade8002720) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gwakeup.c:210
#3  0x00007fae7ca80e84 in g_main_context_check (context=context@entry=0x7fadec000990, max_priority=2147483647, fds=fds@entry=0x7fadec003020, n_fds=n_fds@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3632
#4  0x00007fae7ca81340 in g_main_context_iterate (context=context@entry=0x7fadec000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3837
#5  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fadec000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#6  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fae7cfa26fa in start_thread (arg=0x7fadf68e9700) at pthread_create.c:333
#11 0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fadf70ea700 (LWP 11013)):
#0  0x00007fae86374810 in __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:57
#1  0x00007fae8635ae82 in poll () at ../sysdeps/unix/syscall-template.S:84
#2  0x00007fae7ca8139c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fade8003220, timeout=<optimized out>, context=0x7fade8000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:4135
#3  0x00007fae7ca8139c in g_main_context_iterate (context=context@entry=0x7fade8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3835
#4  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fade8000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#5  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fae7cfa26fa in start_thread (arg=0x7fadf70ea700) at pthread_create.c:333
#10 0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fadf78eb700 (LWP 11010)):
#0  0x00007fae8635ae8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fae7ca8139c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fadf0002e20, timeout=<optimized out>, context=0x7fadf0000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:4135
#2  0x00007fae7ca8139c in g_main_context_iterate (context=context@entry=0x7fadf0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3835
#3  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fadf0000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae7cfa26fa in start_thread (arg=0x7fadf78eb700) at pthread_create.c:333
#9  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fae3bfff700 (LWP 10994)):
#0  0x00007fae7cfa83a0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fae7818f88b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fae7818f8c9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fae7cfa26fa in start_thread (arg=0x7fae3bfff700) at pthread_create.c:333
#4  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fae4cac8700 (LWP 10992)):
#0  0x00007fae8635ae8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fae7ca8139c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fae40002e20, timeout=<optimized out>, context=0x7fae40000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:4135
#2  0x00007fae7ca8139c in g_main_context_iterate (context=context@entry=0x7fae40000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3835
#3  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fae40000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae7cfa26fa in start_thread (arg=0x7fae4cac8700) at pthread_create.c:333
#9  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fae4d2c9700 (LWP 10989)):
#0  0x00007fae8635ae8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fae7ca8139c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fae3c003220, timeout=<optimized out>, context=0x7fae3c000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:4135
#2  0x00007fae7ca8139c in g_main_context_iterate (context=context@entry=0x7fae3c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3835
#3  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fae3c000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae7cfa26fa in start_thread (arg=0x7fae4d2c9700) at pthread_create.c:333
#9  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fae4ffff700 (LWP 10982)):
#0  0x00007fae863569cd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fae7cac4740 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7fae4fffea80, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007fae7cac4740 in g_wakeup_acknowledge (wakeup=0x7fae48002570) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gwakeup.c:210
#3  0x00007fae7ca80e84 in g_main_context_check (context=context@entry=0x7fae44000990, max_priority=2147483647, fds=fds@entry=0x7fae44002e20, n_fds=n_fds@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3632
#4  0x00007fae7ca81340 in g_main_context_iterate (context=context@entry=0x7fae44000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3837
#5  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fae44000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#6  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fae7cfa26fa in start_thread (arg=0x7fae4ffff700) at pthread_create.c:333
#11 0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fae5d115700 (LWP 10979)):
#0  0x00007fae8637482f in __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:65
#1  0x00007fae863569c2 in read () at ../sysdeps/unix/syscall-template.S:84
#2  0x00007fae7cac4740 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7fae5d114a80, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#3  0x00007fae7cac4740 in g_wakeup_acknowledge (wakeup=0x7fae54002780) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gwakeup.c:210
#4  0x00007fae7ca80e84 in g_main_context_check (context=context@entry=0x7fae48000990, max_priority=2147483647, fds=fds@entry=0x7fae48003020, n_fds=n_fds@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3632
#5  0x00007fae7ca81340 in g_main_context_iterate (context=context@entry=0x7fae48000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3837
#6  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fae48000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#7  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fae7cfa26fa in start_thread (arg=0x7fae5d115700) at pthread_create.c:333
#12 0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fae5d916700 (LWP 10977)):
#0  0x00007fae7cac5ac9 in g_mutex_lock (mutex=mutex@entry=0x7fae54000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gthread-posix.c:1335
#1  0x00007fae7ca80f26 in g_main_context_dispatch (context=context@entry=0x7fae54000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3765
#2  0x00007fae7ca81400 in g_main_context_iterate (context=context@entry=0x7fae54000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3840
#3  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fae54000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae7cfa26fa in start_thread (arg=0x7fae5d916700) at pthread_create.c:333
#9  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fae5e117700 (LWP 10974)):
#0  0x00007fae7cac5ac9 in g_mutex_lock (mutex=mutex@entry=0x7fae50000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gthread-posix.c:1335
#1  0x00007fae7ca81382 in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fae50002e20, timeout=<optimized out>, context=0x7fae50000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:4130
#2  0x00007fae7ca81382 in g_main_context_iterate (context=context@entry=0x7fae50000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3835
#3  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fae50000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae7cfa26fa in start_thread (arg=0x7fae5e117700) at pthread_create.c:333
#9  0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fae5e918700 (LWP 10969)):
#0  0x00007fae86c5edcf in QMutex::unlock() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fae86e9d305 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fae7ca80dd1 in g_main_context_check (context=context@entry=0x7fae58000990, max_priority=2147483647, fds=fds@entry=0x7fae58003070, n_fds=n_fds@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3681
#3  0x00007fae7ca81340 in g_main_context_iterate (context=context@entry=0x7fae58000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3837
#4  0x00007fae7ca814ac in g_main_context_iteration (context=0x7fae58000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#5  0x00007fae86e9da9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fae86c618a4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fae86c6684e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fae7cfa26fa in start_thread (arg=0x7fae5e918700) at pthread_create.c:333
#10 0x00007fae86366b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fae672aa940 (LWP 10963)):
[KCrash Handler]
#6  0x00007fae80ca2298 in  () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#7  0x00007fae80d2403f in Akonadi::EntityTreeModel::parent(QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#8  0x00007fae86e11959 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fae86e11dc8 in QSortFilterProxyModel::parent(QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fae86e08382 in QIdentityProxyModel::parent(QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fae86e08382 in QIdentityProxyModel::parent(QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fae80d482be in Akonadi::StatisticsProxyModel::parent(QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#13 0x00007fae86e12f3b in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fae86e132d1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fae86e1879b in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007fae86e75fca in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fae86ef21e6 in QAbstractItemModel::layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fae86e0af11 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fae86e0b4d3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fae86e75fca in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007fae86ef21e6 in QAbstractItemModel::layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fae86e0af11 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fae86e0b4d3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fae86e75fca in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fae86ef21e6 in QAbstractItemModel::layoutChanged(QList<QPersistentModelIndex> const&, QAbstractItemModel::LayoutChangeHint) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007fae86e13680 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fae86e186d4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007fae86e75fca in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fae86ef2722 in QAbstractItemModel::rowsMoved(QModelIndex const&, int, int, QModelIndex const&, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fae86defd84 in QAbstractItemModel::endMoveRows() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007fae80d349af in Akonadi::EntityTreeModelPrivate::monitoredCollectionMoved(Akonadi::Collection const&, Akonadi::Collection const&, Akonadi::Collection const&) () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#32 0x00007fae86e75fca in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007fae80c7b56f in Akonadi::Monitor::collectionMoved(Akonadi::Collection const&, Akonadi::Collection const&, Akonadi::Collection const&) () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#34 0x00007fae80c81762 in Akonadi::MonitorPrivate::emitCollectionNotification(Akonadi::Protocol::ChangeNotification const&, Akonadi::Collection const&, Akonadi::Collection const&, Akonadi::Collection const&) () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#35 0x00007fae80c89100 in Akonadi::MonitorPrivate::emitNotification(Akonadi::Protocol::ChangeNotification const&) () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#36 0x00007fae80c3f9ee in Akonadi::ChangeRecorderPrivate::emitNotification(Akonadi::Protocol::ChangeNotification const&) () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#37 0x00007fae80c83cb4 in Akonadi::MonitorPrivate::flushPipeline() () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#38 0x00007fae80c83f19 in Akonadi::MonitorPrivate::dataAvailable() () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#39 0x00007fae86e75fca in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007fae80c38a22 in  () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#41 0x00007fae80c5e614 in  () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#42 0x00007fae86e75fca in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x00007fae8786b6c2 in KJob::result(KJob*, KJob::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#44 0x00007fae8786c281 in KJob::finishJob(bool) () at /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#45 0x00007fae80cec4e3 in  () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#46 0x00007fae86e76ea1 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007fae87c1b05c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#48 0x00007fae87c20516 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#49 0x00007fae86e4762b in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#50 0x00007fae86e49a26 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#51 0x00007fae86e9d673 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#52 0x00007fae7ca811a7 in g_main_context_dispatch (context=0x7fae600016f0) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3154
#53 0x00007fae7ca811a7 in g_main_context_dispatch (context=context@entry=0x7fae600016f0) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3769
#54 0x00007fae7ca81400 in g_main_context_iterate (context=context@entry=0x7fae600016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3840
#55 0x00007fae7ca814ac in g_main_context_iteration (context=0x7fae600016f0, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#56 0x00007fae86e9da7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#57 0x00007fae86e44dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#58 0x00007fae86e4ce8c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#59 0x00000000004040d8 in main ()

Reported using DrKonqi