Application: kmail (5.1.3)

Qt Version: 5.5.1
Frameworks Version: 5.23.0
Operating System: Linux 4.4.0-35-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

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

After writing an email kmail asked if i want to encrypt the message as the gpg key is known. during this process kmail crashed.

The crash can be reproduced sometimes.

-- 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 0x7fbc7f130980 (LWP 25999))]

Thread 29 (Thread 0x7fbbb6a23700 (LWP 20665)):
#0  0x00007fbca0965e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc9707139c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbb6a22c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fbca127184e in QThreadPrivate::start (arg=0x53a86b0) at thread/qthread_unix.cpp:331
#7  0x00007fbc975926fa in start_thread (arg=0x7fbbb6a23700) at pthread_create.c:333
#8  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 28 (Thread 0x7fbbd541d700 (LWP 27499)):
#0  QListData::begin (this=0x7fbbc40030d0) at ../../include/QtCore/../../src/corelib/tools/qlist.h:108
#1  QList<QTimerInfo*>::constBegin (this=0x7fbbc40030d0) at ../../include/QtCore/../../src/corelib/tools/qlist.h:302
#2  QTimerInfoList::timerWait (this=0x7fbbc40030d0, tm=...) at kernel/qtimerinfo_unix.cpp:386
#3  0x00007fbca14a7e7e in timerSourcePrepareHelper (timeout=0x7fbbd541ca84, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#4  timerSourcePrepare (source=<optimized out>, timeout=0x7fbbd541ca84) at kernel/qeventdispatcher_glib.cpp:160
#5  0x00007fbc9707092d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fbc970712cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbc40034f0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#9  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbd541cc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#10 0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#11 0x00007fbca127184e in QThreadPrivate::start (arg=0x2f05970) at thread/qthread_unix.cpp:331
#12 0x00007fbc975926fa in start_thread (arg=0x7fbbd541d700) at pthread_create.c:333
#13 0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 27 (Thread 0x7fbbbf3cd700 (LWP 26152)):
#0  0x00007fbca0965e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc9707139c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbb00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbbf3ccc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fbca127184e in QThreadPrivate::start (arg=0x2e20760) at thread/qthread_unix.cpp:331
#7  0x00007fbc975926fa in start_thread (arg=0x7fbbbf3cd700) at pthread_create.c:333
#8  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 26 (Thread 0x7fbbbffff700 (LWP 26149)):
#0  0x00007fbca0965e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc9707139c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbb80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbbfffec40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fbca127184e in QThreadPrivate::start (arg=0x2d95b20) at thread/qthread_unix.cpp:331
#7  0x00007fbc975926fa in start_thread (arg=0x7fbbbffff700) at pthread_create.c:333
#8  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (Thread 0x7fbbd65f3700 (LWP 26143)):
#0  QTimerInfoList::repairTimersIfNeeded (this=0x7fbbc0002ed0) at kernel/qtimerinfo_unix.cpp:154
#1  0x00007fbca14a6aa3 in QTimerInfoList::timerWait (this=0x7fbbc0002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:382
#2  0x00007fbca14a7e7e in timerSourcePrepareHelper (timeout=0x7fbbd65f2a84, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#3  timerSourcePrepare (source=<optimized out>, timeout=0x7fbbd65f2a84) at kernel/qeventdispatcher_glib.cpp:160
#4  0x00007fbc9707092d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbc970712cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbc00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#8  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbd65f2c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#9  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#10 0x00007fbca127184e in QThreadPrivate::start (arg=0x2477930) at thread/qthread_unix.cpp:331
#11 0x00007fbc975926fa in start_thread (arg=0x7fbbd65f3700) at pthread_create.c:333
#12 0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7fbbd6df4700 (LWP 26142)):
#0  0x00007fbca12699aa in QBasicAtomicOps<8>::testAndSetRelaxed<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x21f1d68: 0x1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  QGenericAtomicOps<QBasicAtomicOps<8> >::testAndSetAcquire<QMutexData*, QMutexData*> (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, _q_value=@0x21f1d68: 0x1) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:166
#2  QBasicAtomicPointer<QMutexData>::testAndSetAcquire (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, this=0x21f1d68, this@entry=0x1) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:276
#3  QBasicMutex::fastTryLock (current=<synthetic pointer>, this=0x21f1d68, this@entry=0x1) at thread/qmutex.h:82
#4  QMutex::lock (this=this@entry=0x21f1d68) at thread/qmutex.cpp:212
#5  0x00007fbca14a801f in QMutexLocker::QMutexLocker (m=0x21f1d68, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#6  QThreadData::canWaitLocked (this=0x21f1d40) at ../../include/QtCore/5.5.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:240
#7  postEventSourcePrepare (s=0x7fbbcc0012d0, timeout=0x7fbbd6df3a84) at kernel/qeventdispatcher_glib.cpp:254
#8  0x00007fbc9707092d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fbc970712cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbcc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#12 0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbd6df3c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#13 0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#14 0x00007fbca127184e in QThreadPrivate::start (arg=0x2463d00) at thread/qthread_unix.cpp:331
#15 0x00007fbc975926fa in start_thread (arg=0x7fbbd6df4700) at pthread_create.c:333
#16 0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7fbbd75f5700 (LWP 26141)):
#0  0x00007fbca09619cd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc970b4740 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc97070e84 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc97071340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbc80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbd75f4c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007fbca127184e in QThreadPrivate::start (arg=0x2409800) at thread/qthread_unix.cpp:331
#9  0x00007fbc975926fa in start_thread (arg=0x7fbbd75f5700) at pthread_create.c:333
#10 0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7fbbd7df6700 (LWP 26140)):
#0  0x00007fbc97070e28 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc97071340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbd00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbd7df5c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fbca127184e in QThreadPrivate::start (arg=0x24140c0) at thread/qthread_unix.cpp:331
#7  0x00007fbc975926fa in start_thread (arg=0x7fbbd7df6700) at pthread_create.c:333
#8  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7fbbeddd5700 (LWP 26134)):
#0  0x00007fbc970b5ac9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc97070330 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc97071255 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbdc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbeddd4c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fbca127184e in QThreadPrivate::start (arg=0x28bc880) at thread/qthread_unix.cpp:331
#8  0x00007fbc975926fa in start_thread (arg=0x7fbbeddd5700) at pthread_create.c:333
#9  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7fbbeebfd700 (LWP 26113)):
#0  0x00007fbca0965e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc9707139c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbbd80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbbeebfcc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fbca127184e in QThreadPrivate::start (arg=0x28bb2a0) at thread/qthread_unix.cpp:331
#7  0x00007fbc975926fa in start_thread (arg=0x7fbbeebfd700) at pthread_create.c:333
#8  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7fbbef7fe700 (LWP 26108)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc923c7aa3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc926e8541 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc975926fa in start_thread (arg=0x7fbbef7fe700) at pthread_create.c:333
#4  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7fbbeffff700 (LWP 26107)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc923c7aa3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc926e8541 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc975926fa in start_thread (arg=0x7fbbeffff700) at pthread_create.c:333
#4  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7fbc0c838700 (LWP 26106)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc923c7aa3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc926e8541 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc975926fa in start_thread (arg=0x7fbc0c838700) at pthread_create.c:333
#4  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7fbc0d039700 (LWP 26105)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc923c7aa3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc926e8541 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc975926fa in start_thread (arg=0x7fbc0d039700) at pthread_create.c:333
#4  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7fbc0d83a700 (LWP 26104)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc923c7aa3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc926e8541 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc975926fa in start_thread (arg=0x7fbc0d83a700) at pthread_create.c:333
#4  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7fbc0e03b700 (LWP 26103)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc923c7aa3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc926e8541 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc975926fa in start_thread (arg=0x7fbc0e03b700) at pthread_create.c:333
#4  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7fbc0e83c700 (LWP 26102)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc923c6a74 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc926e8541 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc975926fa in start_thread (arg=0x7fbc0e83c700) at pthread_create.c:333
#4  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7fbc0fffd700 (LWP 26098)):
#0  0x00007fbc97070db8 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc97071340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc0fffcc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fbca127184e in QThreadPrivate::start (arg=0x2500710) at thread/qthread_unix.cpp:331
#7  0x00007fbc975926fa in start_thread (arg=0x7fbc0fffd700) at pthread_create.c:333
#8  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fbc58ab9700 (LWP 26096)):
#0  0x00007fbca0965e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc9707139c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc000008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc58ab8c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fbca127184e in QThreadPrivate::start (arg=0x2501060) at thread/qthread_unix.cpp:331
#7  0x00007fbc975926fa in start_thread (arg=0x7fbc58ab9700) at pthread_create.c:333
#8  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fbc592ba700 (LWP 26094)):
#0  0x00007fbca09619cd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc970b4740 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc97070e84 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc97071340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc592b9c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007fbca127184e in QThreadPrivate::start (arg=0x245b020) at thread/qthread_unix.cpp:331
#9  0x00007fbc975926fa in start_thread (arg=0x7fbc592ba700) at pthread_create.c:333
#10 0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fbc5b7fe700 (LWP 26093)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbc926b888b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fbc926b88c9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fbc975926fa in start_thread (arg=0x7fbc5b7fe700) at pthread_create.c:333
#4  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fbc5bfff700 (LWP 26091)):
#0  0x00007fbca12699aa in QBasicAtomicOps<8>::testAndSetRelaxed<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x244de98: 0x1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  QGenericAtomicOps<QBasicAtomicOps<8> >::testAndSetAcquire<QMutexData*, QMutexData*> (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, _q_value=@0x244de98: 0x1) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:166
#2  QBasicAtomicPointer<QMutexData>::testAndSetAcquire (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, this=0x244de98, this@entry=0x1) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:276
#3  QBasicMutex::fastTryLock (current=<synthetic pointer>, this=0x244de98, this@entry=0x1) at thread/qmutex.h:82
#4  QMutex::lock (this=this@entry=0x244de98) at thread/qmutex.cpp:212
#5  0x00007fbca14a801f in QMutexLocker::QMutexLocker (m=0x244de98, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#6  QThreadData::canWaitLocked (this=0x244de70) at ../../include/QtCore/5.5.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:240
#7  postEventSourcePrepare (s=0x7fbc500012d0, timeout=0x7fbc5bffea84) at kernel/qeventdispatcher_glib.cpp:254
#8  0x00007fbc9707092d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fbc970712cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#12 0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc5bffec40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#13 0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#14 0x00007fbca127184e in QThreadPrivate::start (arg=0x2458a90) at thread/qthread_unix.cpp:331
#15 0x00007fbc975926fa in start_thread (arg=0x7fbc5bfff700) at pthread_create.c:333
#16 0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fbc64a3c700 (LWP 26088)):
#0  0x00007fbca09619cd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc970b4740 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc97070e84 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc97071340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc64a3bc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007fbca127184e in QThreadPrivate::start (arg=0x246eeb0) at thread/qthread_unix.cpp:331
#9  0x00007fbc975926fa in start_thread (arg=0x7fbc64a3c700) at pthread_create.c:333
#10 0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fbc67fff700 (LWP 26060)):
#0  0x00007fbca0965e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc9707139c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc5c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc67ffec40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fbca127184e in QThreadPrivate::start (arg=0x2235e70) at thread/qthread_unix.cpp:331
#7  0x00007fbc975926fa in start_thread (arg=0x7fbc67fff700) at pthread_create.c:333
#8  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fbc75069700 (LWP 26057)):
#0  idleTimerSourceCheck (source=0x7fbc60002f20) at kernel/qeventdispatcher_glib.cpp:211
#1  0x00007fbc97070dd1 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc97071340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc75068c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fbca127184e in QThreadPrivate::start (arg=0x21916d0) at thread/qthread_unix.cpp:331
#8  0x00007fbc975926fa in start_thread (arg=0x7fbc75069700) at pthread_create.c:333
#9  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fbc7586a700 (LWP 26053)):
#0  0x00007fbc970b5af0 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc970709b0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970712cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc6c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc75869c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fbca127184e in QThreadPrivate::start (arg=0x2186c60) at thread/qthread_unix.cpp:331
#8  0x00007fbc975926fa in start_thread (arg=0x7fbc7586a700) at pthread_create.c:333
#9  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fbc7606b700 (LWP 26052)):
#0  0x00007fbc970b5ad8 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbc97070939 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc970712cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc680008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc7606ac40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fbca127184e in QThreadPrivate::start (arg=0x220e160) at thread/qthread_unix.cpp:331
#8  0x00007fbc975926fa in start_thread (arg=0x7fbc7606b700) at pthread_create.c:333
#9  0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fbc768ff700 (LWP 26040)):
#0  0x00007fbca09619cd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbc970b4740 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbc97070e84 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbc97071340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbca14a8a9b in QEventDispatcherGlib::processEvents (this=0x7fbc700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7fbc768fec40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007fbca126c8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007fbca127184e in QThreadPrivate::start (arg=0x21393f0) at thread/qthread_unix.cpp:331
#9  0x00007fbc975926fa in start_thread (arg=0x7fbc768ff700) at pthread_create.c:333
#10 0x00007fbca0971b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fbc7f130980 (LWP 25999)):
[KCrash Handler]
#6  QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data (this=0x630069fffffff7) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
#7  qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:983
#8  QObject::d_func (this=this@entry=0x630069ffffffef) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:110
#9  QObjectPrivate::get (o=o@entry=0x630069ffffffef) at ../../include/QtCore/5.5.1/QtCore/private/../../../../../src/corelib/kernel/qobject_p.h:192
#10 QtSharedPointer::ExternalRefCountData::getAndRef (obj=obj@entry=0x630069ffffffef) at tools/qsharedpointer.cpp:1327
#11 0x00007fbca177af1c in QWeakPointer<QObject>::QWeakPointer<QWindow> (ptr=0x630069ffffffef, this=0x3f37090) at ../../include/QtCore/../../src/corelib/tools/qsharedpointer_impl.h:696
#12 QPointer<QWindow>::QPointer (p=0x630069ffffffef, this=0x3f37090) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:62
#13 QWindowSystemInterfacePrivate::UserEvent::UserEvent (t=QWindowSystemInterfacePrivate::Key, time=68957911, w=0x630069ffffffef, this=0x3f37080) at kernel/qwindowsysteminterface_p.h:200
#14 QWindowSystemInterfacePrivate::InputEvent::InputEvent (mods=..., t=QWindowSystemInterfacePrivate::Key, time=68957911, w=0x630069ffffffef, this=0x3f37080) at kernel/qwindowsysteminterface_p.h:212
#15 QWindowSystemInterfacePrivate::KeyEvent::KeyEvent (count=1, autorep=false, text=..., nativeMods=16, nativeVK=65421, nativeSC=104, mods=..., k=16777221, t=QEvent::KeyRelease, time=68957911, w=0x630069ffffffef, this=0x3f37080) at kernel/qwindowsysteminterface_p.h:258
#16 QWindowSystemInterface::handleExtendedKeyEvent (tlw=0x630069ffffffef, timestamp=68957911, type=<optimized out>, key=16777221, modifiers=..., nativeScanCode=104, nativeVirtualKey=65421, nativeModifiers=16, text=..., autorep=false, count=1, tryShortcutOverride=true) at kernel/qwindowsysteminterface.cpp:346
#17 0x00007fbc7ebebb43 in QXcbKeyboard::handleKeyEvent (this=<optimized out>, sourceWindow=<optimized out>, type=type@entry=QEvent::KeyRelease, code=104 'h', state=<optimized out>, time=68957911) at qxcbkeyboard.cpp:1520
#18 0x00007fbc7ebebded in QXcbKeyboard::handleKeyReleaseEvent (this=<optimized out>, event=event@entry=0x7fbc780046d0) at qxcbkeyboard.cpp:1562
#19 0x00007fbc7ebe38bc in QXcbConnection::handleXcbEvent (this=this@entry=0x20a09c0, event=event@entry=0x7fbc780046d0) at qxcbconnection.cpp:1106
#20 0x00007fbc7ebe3e53 in QXcbConnection::processXcbEvents (this=0x20a09c0) at qxcbconnection.cpp:1532
#21 0x00007fbca1481ea1 in QObject::event (this=0x20a09c0, e=<optimized out>) at kernel/qobject.cpp:1239
#22 0x00007fbca222805c in QApplicationPrivate::notify_helper (this=this@entry=0x2094eb0, receiver=receiver@entry=0x20a09c0, e=e@entry=0x7fbc78003640) at kernel/qapplication.cpp:3716
#23 0x00007fbca222d516 in QApplication::notify (this=0x7ffd2962b7a0, receiver=0x20a09c0, e=0x7fbc78003640) at kernel/qapplication.cpp:3499
#24 0x00007fbca145262b in QCoreApplication::notifyInternal (this=0x7ffd2962b7a0, receiver=0x20a09c0, event=event@entry=0x7fbc78003640) at kernel/qcoreapplication.cpp:965
#25 0x00007fbca1454a26 in QCoreApplication::sendEvent (event=0x7fbc78003640, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#26 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x2090d50) at kernel/qcoreapplication.cpp:1593
#27 0x00007fbca1454f08 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#28 0x00007fbca14a8673 in postEventSourceDispatch (s=0x20d7db0) at kernel/qeventdispatcher_glib.cpp:271
#29 0x00007fbc970711a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007fbc97071400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007fbca14a8a7f in QEventDispatcherGlib::processEvents (this=0x20d77b0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#33 0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7ffd29627b30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#34 0x00007fbca2422c7d in QDialog::exec (this=0x562c4a0) at dialogs/qdialog.cpp:541
#35 0x00007fbc9ea8bb18 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#36 0x00007fbca1480e4f in QtPrivate::QSlotObjectBase::call (a=0x7ffd29627e30, r=0x4e88a50, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#37 QMetaObject::activate (sender=0x4e8afe0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3698
#38 0x00007fbca1e781b2 in KJob::result(KJob*, KJob::QPrivateSignal) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#39 0x00007fbca1e78d81 in KJob::finishJob(bool) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#40 0x00007fbc9b2e64e3 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5AkonadiCore.so.5
#41 0x00007fbca1481ea1 in QObject::event (this=0x4e8afe0, e=<optimized out>) at kernel/qobject.cpp:1239
#42 0x00007fbca222805c in QApplicationPrivate::notify_helper (this=this@entry=0x2094eb0, receiver=receiver@entry=0x4e8afe0, e=e@entry=0x4e89b20) at kernel/qapplication.cpp:3716
#43 0x00007fbca222d516 in QApplication::notify (this=0x7ffd2962b7a0, receiver=0x4e8afe0, e=0x4e89b20) at kernel/qapplication.cpp:3499
#44 0x00007fbca145262b in QCoreApplication::notifyInternal (this=0x7ffd2962b7a0, receiver=0x4e8afe0, event=event@entry=0x4e89b20) at kernel/qcoreapplication.cpp:965
#45 0x00007fbca1454a26 in QCoreApplication::sendEvent (event=0x4e89b20, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#46 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x2090d50) at kernel/qcoreapplication.cpp:1593
#47 0x00007fbca1454f08 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#48 0x00007fbca14a8673 in postEventSourceDispatch (s=0x20d7db0) at kernel/qeventdispatcher_glib.cpp:271
#49 0x00007fbc970711a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#50 0x00007fbc97071400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#51 0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#52 0x00007fbca14a8a7f in QEventDispatcherGlib::processEvents (this=0x20d77b0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#53 0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7ffd29628400, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#54 0x00007fbca2422c7d in QDialog::exec (this=0x53c1520) at dialogs/qdialog.cpp:541
#55 0x00007fbc99527fe9 in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QIcon const&, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&, QMessageBox::Icon) () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#56 0x00007fbc995286c8 in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QMessageBox::Icon, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&) () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#57 0x00007fbc9952a4b7 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#58 0x00007fbc9952a80c in KMessageBox::warningContinueCancel(QWidget*, QString const&, QString const&, KGuiItem const&, KGuiItem const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#59 0x00007fbc9eaafb94 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#60 0x00007fbc9eab5e15 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#61 0x00007fbc9eab6ab8 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#62 0x00007fbc9ea9f253 in MessageComposer::ComposerViewBase::generateCryptoMessages(bool&) () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#63 0x00007fbc9eaa4df6 in MessageComposer::ComposerViewBase::slotEmailAddressResolved(KJob*) () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#64 0x00007fbca1480e4f in QtPrivate::QSlotObjectBase::call (a=0x7ffd29629240, r=0x585ab30, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#65 QMetaObject::activate (sender=0x58a1fb0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3698
#66 0x00007fbca1e781b2 in KJob::result(KJob*, KJob::QPrivateSignal) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#67 0x00007fbca1e78d81 in KJob::finishJob(bool) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#68 0x00007fbc9ea876b4 in MessageComposer::EmailAddressResolveJob::start() () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#69 0x00007fbc9ea97f4a in MessageComposer::ComposerViewBase::readyForSending() () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#70 0x00007fbc9eaa3633 in MessageComposer::ComposerViewBase::send(MessageComposer::MessageSender::SendMethod, MessageComposer::MessageSender::SaveIn, bool) () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#71 0x00007fbca2ce3db6 in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#72 0x00007fbca2ce62fa in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#73 0x00007fbca1480e4f in QtPrivate::QSlotObjectBase::call (a=0x7ffd29629940, r=0x4084fb0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#74 QMetaObject::activate (sender=0x53a51d0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3698
#75 0x00007fbca1e781b2 in KJob::result(KJob*, KJob::QPrivateSignal) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#76 0x00007fbca1e78d81 in KJob::finishJob(bool) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#77 0x00007fbca2c483ff in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#78 0x00007fbca2c488a0 in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#79 0x00007fbca1480fca in QMetaObject::activate (sender=0x53a6300, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3713
#80 0x00007fbca1e781b2 in KJob::result(KJob*, KJob::QPrivateSignal) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#81 0x00007fbca1e78d81 in KJob::finishJob(bool) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#82 0x00007fbc9ea850c4 in MessageComposer::AliasesExpandJob::start() () from /usr/lib/x86_64-linux-gnu/libKF5MessageComposer.so.5
#83 0x00007fbca2c47dbf in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#84 0x00007fbca2ce4add in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#85 0x00007fbca2ce5a68 in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#86 0x00007fbca1480e4f in QtPrivate::QSlotObjectBase::call (a=0x7ffd2962a0a0, r=0x4084fb0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#87 QMetaObject::activate (sender=0x2cb0790, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3698
#88 0x00007fbca2d10832 in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#89 0x00007fbca2cf6c2d in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#90 0x00007fbca2ce142b in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#91 0x00007fbca2d1893f in ?? () from /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#92 0x00007fbca1480fca in QMetaObject::activate (sender=sender@entry=0x60c80b0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffd2962a490) at kernel/qobject.cpp:3713
#93 0x00007fbca14817d7 in QMetaObject::activate (sender=sender@entry=0x60c80b0, m=m@entry=0x7fbca2729f00 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffd2962a490) at kernel/qobject.cpp:3578
#94 0x00007fbca221e412 in QAction::triggered (this=this@entry=0x60c80b0, _t1=false) at .moc/moc_qaction.cpp:365
#95 0x00007fbca2220898 in QAction::activate (this=0x60c80b0, event=<optimized out>) at kernel/qaction.cpp:1162
#96 0x00007fbca2326560 in QAbstractButtonPrivate::click (this=0x6186890) at widgets/qabstractbutton.cpp:516
#97 0x00007fbca2326694 in QAbstractButton::mouseReleaseEvent (this=0x5874c90, e=0x7ffd2962a9a0) at widgets/qabstractbutton.cpp:1132
#98 0x00007fbca23eb15a in QToolButton::mouseReleaseEvent (this=<optimized out>, e=<optimized out>) at widgets/qtoolbutton.cpp:609
#99 0x00007fbca226af88 in QWidget::event (this=0x5874c90, event=0x7ffd2962a9a0) at kernel/qwidget.cpp:9044
#100 0x00007fbca23273f1 in QAbstractButton::event (this=this@entry=0x5874c90, e=e@entry=0x7ffd2962a9a0) at widgets/qabstractbutton.cpp:1089
#101 0x00007fbca23eb239 in QToolButton::event (this=0x5874c90, event=0x7ffd2962a9a0) at widgets/qtoolbutton.cpp:970
#102 0x00007fbca222805c in QApplicationPrivate::notify_helper (this=this@entry=0x2094eb0, receiver=receiver@entry=0x5874c90, e=e@entry=0x7ffd2962a9a0) at kernel/qapplication.cpp:3716
#103 0x00007fbca222dc19 in QApplication::notify (this=<optimized out>, receiver=0x5874c90, e=0x7ffd2962a9a0) at kernel/qapplication.cpp:3276
#104 0x00007fbca145262b in QCoreApplication::notifyInternal (this=0x7ffd2962b7a0, receiver=receiver@entry=0x5874c90, event=event@entry=0x7ffd2962a9a0) at kernel/qcoreapplication.cpp:965
#105 0x00007fbca222cb32 in QCoreApplication::sendSpontaneousEvent (event=0x7ffd2962a9a0, receiver=0x5874c90) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#106 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x5874c90, event=event@entry=0x7ffd2962a9a0, alienWidget=alienWidget@entry=0x5874c90, nativeWidget=0x4084fb0, buttonDown=buttonDown@entry=0x7fbca2758b20 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:2770
#107 0x00007fbca228557b in QWidgetWindow::handleMouseEvent (this=this@entry=0x589edb0, event=event@entry=0x7ffd2962adb0) at kernel/qwidgetwindow.cpp:555
#108 0x00007fbca2287b3b in QWidgetWindow::event (this=0x589edb0, event=0x7ffd2962adb0) at kernel/qwidgetwindow.cpp:210
#109 0x00007fbca222805c in QApplicationPrivate::notify_helper (this=this@entry=0x2094eb0, receiver=receiver@entry=0x589edb0, e=e@entry=0x7ffd2962adb0) at kernel/qapplication.cpp:3716
#110 0x00007fbca222d516 in QApplication::notify (this=0x7ffd2962b7a0, receiver=0x589edb0, e=0x7ffd2962adb0) at kernel/qapplication.cpp:3499
#111 0x00007fbca145262b in QCoreApplication::notifyInternal (this=0x7ffd2962b7a0, receiver=receiver@entry=0x589edb0, event=event@entry=0x7ffd2962adb0) at kernel/qcoreapplication.cpp:965
#112 0x00007fbca1794521 in QCoreApplication::sendSpontaneousEvent (event=0x7ffd2962adb0, receiver=0x589edb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#113 QGuiApplicationPrivate::processMouseEvent (e=0x2d3be60) at kernel/qguiapplication.cpp:1804
#114 0x00007fbca17961e5 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x2d3be60) at kernel/qguiapplication.cpp:1596
#115 0x00007fbca1779f38 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:625
#116 0x00007fbc7ec13070 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#117 0x00007fbc970711a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#118 0x00007fbc97071400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#119 0x00007fbc970714ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#120 0x00007fbca14a8a7f in QEventDispatcherGlib::processEvents (this=0x20d77b0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#121 0x00007fbca144fdea in QEventLoop::exec (this=this@entry=0x7ffd2962b130, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#122 0x00007fbca1457e8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#123 0x00000000004040d8 in main ()

Reported using DrKonqi