Bug 384310

Summary: Kontact crashes every time when started
Product: [Applications] kontact Reporter: Kai Holthaus <kai_holthaus>
Component: generalAssignee: kdepim bugs <kdepim-bugs>
Status: RESOLVED DUPLICATE    
Severity: crash Keywords: drkonqi
Priority: NOR    
Version: 5.2.3   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Kai Holthaus 2017-09-03 12:57:03 UTC 
Application: kontact (5.2.3)

Qt Version: 5.7.1
Frameworks Version: 5.31.0
Operating System: Linux 4.10.0-33-generic x86_64
Distribution: Ubuntu 17.04

-- Information about the crash:
- What I was doing when the application crashed:
Starting Kontact. Kontact windows is displayed, and then immediately Kontact crashes.

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 0x7f9f8f1df000 (LWP 4400))]

Thread 18 (Thread 0x7f9ed9687700 (LWP 4430)):
#0  0x00007f9f850c98b9 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f9f8c7d0a26 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f9f8c7cc252 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9f850c36da in start_thread (arg=0x7f9ed9687700) at pthread_create.c:456
#5  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 17 (Thread 0x7f9ed9e88700 (LWP 4429)):
#0  0x00007f9f8333aef0 in g_mutex_unlock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f832f4b70 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f549b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9f850c36da in start_thread (arg=0x7f9ed9e88700) at pthread_create.c:456
#9  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 16 (Thread 0x7f9ef910f700 (LWP 4422)):
#0  0x00007f9f8333aef4 in g_mutex_unlock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f832f4f81 in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f5514 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9f850c36da in start_thread (arg=0x7f9ef910f700) at pthread_create.c:456
#9  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 15 (Thread 0x7f9ef9910700 (LWP 4420)):
#0  0x00007f9f8333aef4 in g_mutex_unlock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f832f4a60 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f549b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9f850c36da in start_thread (arg=0x7f9ef9910700) at pthread_create.c:456
#9  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 14 (Thread 0x7f9efa111700 (LWP 4418)):
#0  0x00007f9f832f2557 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f832f4ec4 in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f5514 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9f850c36da in start_thread (arg=0x7f9efa111700) at pthread_create.c:456
#9  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 13 (Thread 0x7f9efad52700 (LWP 4416)):
#0  0x00007f9f8333aef4 in g_mutex_unlock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f832f510a in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f55e0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9f850c36da in start_thread (arg=0x7f9efad52700) at pthread_create.c:456
#9  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 12 (Thread 0x7f9efb771700 (LWP 4414)):
#0  0x00007f9f832f4a28 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f832f549b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f850c36da in start_thread (arg=0x7f9efb771700) at pthread_create.c:456
#8  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 11 (Thread 0x7f9efbf72700 (LWP 4412)):
#0  0x00007f9f8beb9d8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f9f832f5576 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f850c36da in start_thread (arg=0x7f9efbf72700) at pthread_create.c:456
#8  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 10 (Thread 0x7f9efc773700 (LWP 4410)):
#0  0x00007f9f8333aed9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f832f4ce1 in g_main_context_query () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f54e8 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f9f850c36da in start_thread (arg=0x7f9efc773700) at pthread_create.c:456
#9  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 9 (Thread 0x7f9f163dd700 (LWP 4409)):
#0  0x00007f9f850c9510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9f894c18d3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f9f897e9641 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f9f850c36da in start_thread (arg=0x7f9f163dd700) at pthread_create.c:456
#4  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7f9f16bde700 (LWP 4408)):
#0  0x00007f9f850c9510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9f894c18d3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f9f897e9641 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f9f850c36da in start_thread (arg=0x7f9f16bde700) at pthread_create.c:456
#4  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7f9f173df700 (LWP 4407)):
#0  0x00007f9f850c9510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9f894c18d3 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f9f897e9641 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f9f850c36da in start_thread (arg=0x7f9f173df700) at pthread_create.c:456
#4  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7f9f17be0700 (LWP 4406)):
#0  0x00007f9f850c9510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9f894c07b1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f9f897e9641 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f9f850c36da in start_thread (arg=0x7f9f17be0700) at pthread_create.c:456
#4  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7f9f1e866700 (LWP 4405)):
#0  0x00007f9f8333aed9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f832f555b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f850c36da in start_thread (arg=0x7f9f1e866700) at pthread_create.c:456
#8  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7f9f6674b700 (LWP 4404)):
#0  0x00007f9f850c9510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9f897b894b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007f9f897b8989 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007f9f850c36da in start_thread (arg=0x7f9f6674b700) at pthread_create.c:456
#4  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7f9f6795c700 (LWP 4403)):
#0  0x00007f9f8333aef4 in g_mutex_unlock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f832f4d99 in g_main_context_query () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f832f54e8 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f8c9f30bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9f8c7caf83 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9f8b0c05d5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f9f850c36da in start_thread (arg=0x7f9f6795c700) at pthread_create.c:456
#10 0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7f9f6fb40700 (LWP 4401)):
#0  0x00007f9f8beb9d8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f9f856eec62 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f9f856f08d7 in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f9f71e92ef9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f9f8c7cfc38 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9f850c36da in start_thread (arg=0x7f9f6fb40700) at pthread_create.c:456
#6  0x00007f9f8bec5d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7f9f8f1df000 (LWP 4400)):
[KCrash Handler]
#6  0x00007f9f8c85612e in QString::append(QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f9eff2a1077 in  () at /usr/lib/x86_64-linux-gnu/libKF5KSieveUi.so.5
#8  0x00007f9eff2a111a in  () at /usr/lib/x86_64-linux-gnu/libKF5KSieveUi.so.5
#9  0x00007f9eff2a1b18 in  () at /usr/lib/x86_64-linux-gnu/libKF5KSieveUi.so.5
#10 0x00007f9eff2a1e82 in  () at /usr/lib/x86_64-linux-gnu/libKF5KSieveUi.so.5
#11 0x00007f9f8c9caafe in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f9efd431f7a in KManageSieve::SieveJob::gotList(KManageSieve::SieveJob*, bool, QStringList const&, QString const&) () at /usr/lib/x86_64-linux-gnu/libKF5KManageSieve.so.5
#13 0x00007f9efd4311d7 in KManageSieve::SieveJob::Private::handleResponse(KManageSieve::Response const&, QByteArray const&) () at /usr/lib/x86_64-linux-gnu/libKF5KManageSieve.so.5
#14 0x00007f9efd428b91 in  () at /usr/lib/x86_64-linux-gnu/libKF5KManageSieve.so.5
#15 0x00007f9f8c9cb639 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f9f8d8c535c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f9f8d8ccb21 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f9f8c99ec00 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f9f8c9a139d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f9f8c9f2c93 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f9f832f5377 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f9f832f55e0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f9f832f568c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f9f8c9f309f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f9f8c99cbea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f9f8c9a533c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x000055808002b2bf in  ()
#28 0x00007f9f8bddd3f1 in __libc_start_main (main=0x55808002a320, argc=1, argv=0x7ffc2c5d2cb8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc2c5d2ca8) at ../csu/libc-start.c:291
#29 0x000055808002b7ca in _start ()

Reported using DrKonqi
Comment 1 Kai Holthaus 2017-09-08 13:13:07 UTC 
Additional info:
Crash happens when Laptop (Lenovo Thinkpad X220) is docked and connected to two external displays (via displayport and vga).
Crash does not happen when laptop is undocked and internal display ist used.
Comment 2 Christoph Feck 2017-09-27 14:26:26 UTC 

*** This bug has been marked as a duplicate of bug 372799 ***
Comment 3 Kai Holthaus 2017-09-28 08:22:38 UTC 
I have a hard time imagining the HTML email bug to be a duplicate, because I don't use any preview panes. Meaning, Kontact crashes without trying to interpret HTML.
Kontact works fine on my laptop when I use the internal display. It crashes when any external display is connected.
Comment 4 Christoph Feck 2017-10-12 18:31:01 UTC 
The backtrace is the same, it points to the sieve filtering code.