Application: kontact (5.2.3)

Qt Version: 5.7.1
Frameworks Version: 5.31.0
Operating System: Linux 4.10.0-32-generic x86_64
Distribution: Ubuntu 17.04

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

Loading messages , or getting notifcations, from an imap kolab provider.

The crash can be reproduced every time.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fbc9d3be100 (LWP 3474))]

Thread 25 (Thread 0x7fbbce228700 (LWP 3524)):
#0  0x00007fbc932aa8b9 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007fbc9a9b2a26 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fbc9a9ae252 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc932a46da in start_thread (arg=0x7fbbce228700) at pthread_create.c:456
#5  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 24 (Thread 0x7fbbcea29700 (LWP 3523)):
#0  0x00007fbc9a9a8d99 in QMutex::lock() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fbc9abd482f in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fbc914d5a6d in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc914d649b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fbc932a46da in start_thread (arg=0x7fbbcea29700) at pthread_create.c:456
#10 0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 23 (Thread 0x7fbbcffff700 (LWP 3520)):
#0  0x00007fbc9abd50c1 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc932a46da in start_thread (arg=0x7fbbcffff700) at pthread_create.c:456
#5  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 22 (Thread 0x7fbbe0f81700 (LWP 3518)):
#0  0x00007fbc9d2c2f90 in update_get_addr (ti=0x7fbc9afc9660) at dl-tls.c:807
#1  0x00007fbc9a9b0ac6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fbc9abd480a in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fbc914d5a6d in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc914d649b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fbc932a46da in start_thread (arg=0x7fbbe0f81700) at pthread_create.c:456
#11 0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 21 (Thread 0x7fbbe1782700 (LWP 3516)):
#0  0x00007fbc9a09bd8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc914d6576 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc932a46da in start_thread (arg=0x7fbbe1782700) at pthread_create.c:456
#8  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 20 (Thread 0x7fbbe33ef700 (LWP 3503)):
#0  0x00007fbc9a09bd8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc914d6576 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc932a46da in start_thread (arg=0x7fbbe33ef700) at pthread_create.c:456
#8  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 19 (Thread 0x7fbbe3bf0700 (LWP 3501)):
#0  0x00007fbc914d5ec4 in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc914d6514 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc932a46da in start_thread (arg=0x7fbbe3bf0700) at pthread_create.c:456
#8  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 18 (Thread 0x7fbbf14df700 (LWP 3499)):
#0  0x00007fbc9151bed9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc914d6470 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc932a46da in start_thread (arg=0x7fbbf14df700) at pthread_create.c:456
#8  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 17 (Thread 0x7fbbf1ce0700 (LWP 3497)):
#0  0x00007fbc9151bef4 in g_mutex_unlock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc914d648e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc932a46da in start_thread (arg=0x7fbbf1ce0700) at pthread_create.c:456
#8  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 16 (Thread 0x7fbbf24e1700 (LWP 3495)):
#0  0x00007fbc9151bed9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc914d5a79 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d649b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fbc932a46da in start_thread (arg=0x7fbbf24e1700) at pthread_create.c:456
#9  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 15 (Thread 0x7fbbf3fff700 (LWP 3493)):
#0  0x00007fbc9abd3303 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fbc9abd468e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fbc914d5a6d in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc914d649b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fbc932a46da in start_thread (arg=0x7fbbf3fff700) at pthread_create.c:456
#10 0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 14 (Thread 0x7fbc0c84b700 (LWP 3491)):
#0  0x00007fbc9abd32f3 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fbc9abd468e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fbc914d5a6d in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc914d649b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fbc932a46da in start_thread (arg=0x7fbc0c84b700) at pthread_create.c:456
#10 0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 13 (Thread 0x7fbc0d48c700 (LWP 3489)):
#0  0x00007fbc9151bed9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc914d5f94 in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d6514 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fbc932a46da in start_thread (arg=0x7fbc0d48c700) at pthread_create.c:456
#9  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 12 (Thread 0x7fbc0dc8d700 (LWP 3487)):
#0  0x00007fbc9a09bd8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc914d6576 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc932a46da in start_thread (arg=0x7fbc0dc8d700) at pthread_create.c:456
#8  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 11 (Thread 0x7fbc0e48e700 (LWP 3484)):
#0  0x00007fbc9151bed9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc914d6678 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc932a46da in start_thread (arg=0x7fbc0e48e700) at pthread_create.c:456
#7  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 10 (Thread 0x7fbc0ec8f700 (LWP 3483)):
#0  0x00007fbc914d5d12 in g_main_context_query () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc914d64e8 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc932a46da in start_thread (arg=0x7fbc0ec8f700) at pthread_create.c:456
#8  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 9 (Thread 0x7fbc1ffff700 (LWP 3482)):
#0  0x00007fbc932aa510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc976a38d3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc979cb641 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc932a46da in start_thread (arg=0x7fbc1ffff700) at pthread_create.c:456
#4  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7fbc24fbf700 (LWP 3481)):
#0  0x00007fbc932aa510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc976a38d3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc979cb641 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc932a46da in start_thread (arg=0x7fbc24fbf700) at pthread_create.c:456
#4  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7fbc257c0700 (LWP 3480)):
#0  0x00007fbc932aa510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc976a38d3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc979cb641 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc932a46da in start_thread (arg=0x7fbc257c0700) at pthread_create.c:456
#4  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7fbc25fc1700 (LWP 3479)):
#0  0x00007fbc932aa510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc976a27b1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc979cb641 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc932a46da in start_thread (arg=0x7fbc25fc1700) at pthread_create.c:456
#4  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7fbc2cafe700 (LWP 3478)):
#0  0x00007fbc9a09bd8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc914d6576 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc932a46da in start_thread (arg=0x7fbc2cafe700) at pthread_create.c:456
#8  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7fbc749fb700 (LWP 3477)):
#0  0x00007fbc932aa510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc9799a94b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc9799a989 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc932a46da in start_thread (arg=0x7fbc749fb700) at pthread_create.c:456
#4  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7fbc75c0c700 (LWP 3476)):
#0  0x00007fbc9151bef4 in g_mutex_unlock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc914d5d99 in g_main_context_query () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc914d64e8 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc9abd50bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fbc9a9acf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc992a25d5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fbc932a46da in start_thread (arg=0x7fbc75c0c700) at pthread_create.c:456
#10 0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7fbc7de4e700 (LWP 3475)):
#0  0x00007fbc9a09bd8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc938d0c62 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fbc938d28d7 in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fbc801a0ef9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fbc9a9b1c38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fbc932a46da in start_thread (arg=0x7fbc7de4e700) at pthread_create.c:456
#6  0x00007fbc9a0a7d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7fbc9d3be100 (LWP 3474)):
[KCrash Handler]
#6  0x00007fbc9aa3812e in QString::append(QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fbc15830077 in  () at /usr/lib/x86_64-linux-gnu/libKF5KSieveUi.so.5
#8  0x00007fbc1583011a in  () at /usr/lib/x86_64-linux-gnu/libKF5KSieveUi.so.5
#9  0x00007fbc158304cc in  () at /usr/lib/x86_64-linux-gnu/libKF5KSieveUi.so.5
#10 0x00007fbc9abacafe in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fbc0f94defb in KManageSieve::SieveJob::gotScript(KManageSieve::SieveJob*, bool, QString const&, bool) () at /usr/lib/x86_64-linux-gnu/libKF5KManageSieve.so.5
#12 0x00007fbc0f94c4ed in KManageSieve::SieveJob::Private::handleResponse(KManageSieve::Response const&, QByteArray const&) () at /usr/lib/x86_64-linux-gnu/libKF5KManageSieve.so.5
#13 0x00007fbc0f944b91 in  () at /usr/lib/x86_64-linux-gnu/libKF5KManageSieve.so.5
#14 0x00007fbc9abad639 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fbc9baa735c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fbc9baaeb21 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fbc9ab80c00 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fbc9ab8339d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fbc9abd4c93 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fbc914d6377 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fbc914d65e0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fbc914d668c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fbc9abd509f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fbc9ab7ebea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fbc9ab8733c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x000056024d9b62bf in  ()
#27 0x00007fbc99fbf3f1 in __libc_start_main (main=0x56024d9b5320, argc=1, argv=0x7ffd989407b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd989407a8) at ../csu/libc-start.c:291
#28 0x000056024d9b67ca in _start ()

Reported using DrKonqi