Application: kmail (5.1.1)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-1-amd64 x86_64
Distribution: Debian GNU/Linux testing (stretch)

-- Information about the crash:
- What I was doing when the application crashed:
I've started to write address, it didn't find in recent, so I deleted what I wrote and clicked "pick" (from addressbook) and it crashed

- Custom settings of the application:
I have debian testing and kdepimlibs and akonadi from experimental

-- 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 0x7f4eb3649940 (LWP 3500))]

Thread 24 (Thread 0x7f4eabfff700 (LWP 3503)):
#0  0x00007f4ed39f9e4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4eca0b732c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4ea40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4eabffec80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x13b6e00) at thread/qthread_unix.cpp:331
#7  0x00007f4eca5d8454 in start_thread (arg=0x7f4eabfff700) at pthread_create.c:334
#8  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7f4eab7fe700 (LWP 3504)):
#0  0x00007f4eca0b6c8a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b72d0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e9c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4eab7fdc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x13eab60) at thread/qthread_unix.cpp:331
#7  0x00007f4eca5d8454 in start_thread (arg=0x7f4eab7fe700) at pthread_create.c:334
#8  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7f4eaaffd700 (LWP 3506)):
#0  0x00007f4eca0fba79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b6404 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b72e6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4ea00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4eaaffcc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x13be980) at thread/qthread_unix.cpp:331
#8  0x00007f4eca5d8454 in start_thread (arg=0x7f4eaaffd700) at pthread_create.c:334
#9  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7f4eaa7fc700 (LWP 3508)):
#0  0x00007f4ed39f5e2d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4eca0fa6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b6e14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b72d0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e940008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4eaa7fbc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x13eab20) at thread/qthread_unix.cpp:331
#9  0x00007f4eca5d8454 in start_thread (arg=0x7f4eaa7fc700) at pthread_create.c:334
#10 0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7f4ea9de3700 (LWP 3510)):
#0  0x00007f4eca0b43a1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b6c8a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b72d0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4ea9de2c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x1417800) at thread/qthread_unix.cpp:331
#8  0x00007f4eca5d8454 in start_thread (arg=0x7f4ea9de3700) at pthread_create.c:334
#9  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7f4ea8a16700 (LWP 3512)):
#0  0x00007f4eca0b694f in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b725b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e8c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4ea8a15c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x14d2220) at thread/qthread_unix.cpp:331
#7  0x00007f4eca5d8454 in start_thread (arg=0x7f4ea8a16700) at pthread_create.c:334
#8  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7f4e93fff700 (LWP 3514)):
#0  0x00007f4eca0fba94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b7446 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e880008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#3  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e93ffec80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#5  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x1544670) at thread/qthread_unix.cpp:331
#6  0x00007f4eca5d8454 in start_thread (arg=0x7f4e93fff700) at pthread_create.c:334
#7  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f4e937fe700 (LWP 3517)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4ec57c300b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f4ec57c3049 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f4eca5d8454 in start_thread (arg=0x7f4e937fe700) at pthread_create.c:334
#4  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f4e44f9a700 (LWP 3522)):
#0  0x00007f4ed39f9e4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4eca0b732c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e44f99c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x167b980) at thread/qthread_unix.cpp:331
#7  0x00007f4eca5d8454 in start_thread (arg=0x7f4e44f9a700) at pthread_create.c:334
#8  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f4e3ffff700 (LWP 3524)):
#0  __libc_disable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:98
#1  0x00007f4ed39f9e59 in poll () at ../sysdeps/unix/syscall-template.S:84
#2  0x00007f4eca0b732c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e3fffec80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x16f2d40) at thread/qthread_unix.cpp:331
#8  0x00007f4eca5d8454 in start_thread (arg=0x7f4e3ffff700) at pthread_create.c:334
#9  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f4e3f7fe700 (LWP 3526)):
#0  0x00007f4eca0fba94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b68b0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b725b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e3f7fdc80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x17a3a30) at thread/qthread_unix.cpp:331
#8  0x00007f4eca5d8454 in start_thread (arg=0x7f4e3f7fe700) at pthread_create.c:334
#9  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f4e3e5d2700 (LWP 3528)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4ec54d10f4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f4ec57f2ec1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f4eca5d8454 in start_thread (arg=0x7f4e3e5d2700) at pthread_create.c:334
#4  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f4e3ddd1700 (LWP 3529)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4ec54d2123 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f4ec57f2ec1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f4eca5d8454 in start_thread (arg=0x7f4e3ddd1700) at pthread_create.c:334
#4  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f4e3d5d0700 (LWP 3530)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4ec54d2123 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f4ec57f2ec1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f4eca5d8454 in start_thread (arg=0x7f4e3d5d0700) at pthread_create.c:334
#4  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f4e3cdcf700 (LWP 3531)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4ec54d2123 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f4ec57f2ec1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f4eca5d8454 in start_thread (arg=0x7f4e3cdcf700) at pthread_create.c:334
#4  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f4e2ffff700 (LWP 3532)):
#0  0x00007f4ed39f9e4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4eca0b732c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e200008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e2fffec80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x1902af0) at thread/qthread_unix.cpp:331
#7  0x00007f4eca5d8454 in start_thread (arg=0x7f4e2ffff700) at pthread_create.c:334
#8  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f4e2f1d8700 (LWP 3550)):
#0  0x00007f4eca0b4357 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b685b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b725b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e2f1d7c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x1a89d90) at thread/qthread_unix.cpp:331
#8  0x00007f4eca5d8454 in start_thread (arg=0x7f4e2f1d8700) at pthread_create.c:334
#9  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f4e2d14b700 (LWP 3552)):
#0  0x00007f4eca0fba94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b6b99 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b72a7 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e2d14ac80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x1742ab0) at thread/qthread_unix.cpp:331
#8  0x00007f4eca5d8454 in start_thread (arg=0x7f4e2d14b700) at pthread_create.c:334
#9  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f4e133e9700 (LWP 3563)):
#0  0x00007f4eca0fba90 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b6b99 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b72a7 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e133e8c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x1a3cd60) at thread/qthread_unix.cpp:331
#8  0x00007f4eca5d8454 in start_thread (arg=0x7f4e133e9700) at pthread_create.c:334
#9  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f4e12be8700 (LWP 3567)):
#0  0x00007f4eca0fba90 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b6d59 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b72d0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e12be7c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x1c34730) at thread/qthread_unix.cpp:331
#8  0x00007f4eca5d8454 in start_thread (arg=0x7f4e12be8700) at pthread_create.c:334
#9  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f4e10d72700 (LWP 11253)):
#0  0x00007f4eca0fba94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b71dd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4e00003dd0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e10d71c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x2674a40) at thread/qthread_unix.cpp:331
#7  0x00007f4eca5d8454 in start_thread (arg=0x7f4e10d72700) at pthread_create.c:334
#8  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4dfbfff700 (LWP 11265)):
#0  0x00007f4eca0fba94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b71dd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4dfc0042a0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4dfbffec80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x29821c0) at thread/qthread_unix.cpp:331
#7  0x00007f4eca5d8454 in start_thread (arg=0x7f4dfbfff700) at pthread_create.c:334
#8  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4e11573700 (LWP 11267)):
#0  0x00007f4eca0fba79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4eca0b68c9 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4eca0b725b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4ed452ba5b in QEventDispatcherGlib::processEvents (this=0x7f4df4003680, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7f4e11572c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ed42ef854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ed42f47fe in QThreadPrivate::start (arg=0x297c8c0) at thread/qthread_unix.cpp:331
#8  0x00007f4eca5d8454 in start_thread (arg=0x7f4e11573700) at pthread_create.c:334
#9  0x00007f4ed3a02edd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4eb3649940 (LWP 3500)):
[KCrash Handler]
#6  QSortFilterProxyModelPrivate::index_to_iterator (this=0x24a7fc0, proxy_index=...) at itemmodels/qsortfilterproxymodel.cpp:185
#7  QSortFilterProxyModelPrivate::proxy_to_source (proxy_index=..., this=0x24a7fc0) at itemmodels/qsortfilterproxymodel.cpp:376
#8  QSortFilterProxyModel::mapToSource (proxyIndex=..., this=0x262c070) at itemmodels/qsortfilterproxymodel.cpp:2721
#9  QSortFilterProxyModelPrivate::store_persistent_indexes (this=this@entry=0x24a7fc0) at itemmodels/qsortfilterproxymodel.cpp:1016
#10 0x00007f4ed44a4ceb in QSortFilterProxyModelPrivate::_q_sourceDataChanged (this=<optimized out>, source_top_left=..., source_bottom_right=..., roles=...) at itemmodels/qsortfilterproxymodel.cpp:1200
#11 0x00007f4ed44a6828 in QSortFilterProxyModel::qt_static_metacall (_o=_o@entry=0x262c070, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=5, _a=_a@entry=0x7ffd575079e0) at .moc/moc_qsortfilterproxymodel.cpp:202
#12 0x00007f4ed4503f8a in QMetaObject::activate (sender=sender@entry=0x2883e90, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd575079e0) at kernel/qobject.cpp:3713
#13 0x00007f4ed4504797 in QMetaObject::activate (sender=sender@entry=0x2883e90, m=m@entry=0x7f4ed471dec0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd575079e0) at kernel/qobject.cpp:3578
#14 0x00007f4ed458008c in QAbstractItemModel::dataChanged (this=this@entry=0x2883e90, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:548
#15 0x00007f4ed44a4c3d in QSortFilterProxyModelPrivate::_q_sourceDataChanged (this=<optimized out>, source_top_left=..., source_bottom_right=..., roles=...) at itemmodels/qsortfilterproxymodel.cpp:1233
#16 0x00007f4ed44a6828 in QSortFilterProxyModel::qt_static_metacall (_o=_o@entry=0x2883e90, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=5, _a=_a@entry=0x7ffd57507cf0) at .moc/moc_qsortfilterproxymodel.cpp:202
#17 0x00007f4ed4503f8a in QMetaObject::activate (sender=0x298b320, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd57507cf0) at kernel/qobject.cpp:3713
#18 0x00007f4ed4504797 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f4ed471dec0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd57507cf0) at kernel/qobject.cpp:3578
#19 0x00007f4ed458008c in QAbstractItemModel::dataChanged (this=<optimized out>, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:548
#20 0x00007f4ece39dd1f in Akonadi::EntityTreeModelPrivate::dataChanged(QModelIndex const&, QModelIndex const&) () from /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#21 0x00007f4ece3a1200 in Akonadi::EntityTreeModelPrivate::itemFetchJobDone(KJob*) () from /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#22 0x00007f4ed4503f8a in QMetaObject::activate (sender=0x29afca0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3713
#23 0x00007f4ed4ed89d2 in KJob::result(KJob*, KJob::QPrivateSignal) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#24 0x00007f4ed4ed9591 in KJob::finishJob(bool) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#25 0x00007f4ece35f653 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#26 0x00007f4ed4504e61 in QObject::event (this=0x29afca0, e=<optimized out>) at kernel/qobject.cpp:1239
#27 0x00007f4ed5286ffc in QApplicationPrivate::notify_helper (this=this@entry=0x1275ce0, receiver=receiver@entry=0x29afca0, e=e@entry=0x2b37a20) at kernel/qapplication.cpp:3716
#28 0x00007f4ed528c4b6 in QApplication::notify (this=0x7ffd57508be0, receiver=0x29afca0, e=0x2b37a20) at kernel/qapplication.cpp:3499
#29 0x00007f4ed44d55ab in QCoreApplication::notifyInternal (this=0x7ffd57508be0, receiver=0x29afca0, event=event@entry=0x2b37a20) at kernel/qcoreapplication.cpp:965
#30 0x00007f4ed44d79a6 in QCoreApplication::sendEvent (event=0x2b37a20, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#31 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1271760) at kernel/qcoreapplication.cpp:1593
#32 0x00007f4ed44d7e88 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#33 0x00007f4ed452b633 in postEventSourceDispatch (s=0x12bc2a0) at kernel/qeventdispatcher_glib.cpp:271
#34 0x00007f4eca0b7137 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f4eca0b7390 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f4eca0b743c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f4ed452ba3f in QEventDispatcherGlib::processEvents (this=0x12c8110, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#38 0x00007f4ed44d2d6a in QEventLoop::exec (this=this@entry=0x7ffd57508570, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#39 0x00007f4ed44dae0c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#40 0x0000000000404078 in main ()

Reported using DrKonqi