Application: kontact (4.14.2)
KDE Platform Version: 4.14.2 (Compiled from sources)
Qt Version: 4.8.6
Operating System: Linux 3.19.0-32-generic x86_64
Distribution: Linux Mint 17.3 Rosa

-- Information about the crash:
- What I was doing when the application crashed:
I had just restarted the computer, opened Kmail and was looking for an email when the viewing pane got hung on loading, followed by the crash.

- Unusual behavior I noticed:
On the previous session I noticed an email had disappeared from one of my inboxes, and another inbox was not loading new mails. I restarted the computer, and started again as noted above.

The crash can be reproduced sometimes.

-- 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 0x7f4868e2c800 (LWP 3156))]

Thread 5 (Thread 0x7f4849267700 (LWP 3157)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4863bce81d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f4863bce859 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f48602ef182 in start_thread (arg=0x7f4849267700) at pthread_create.c:312
#4  0x00007f48663a347d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f4808964700 (LWP 3158)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f486390f20d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f4863bfdfd6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f48602ef182 in start_thread (arg=0x7f4808964700) at pthread_create.c:312
#4  0x00007f48663a347d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f47f92f0700 (LWP 3165)):
#0  0x00007f48602f15c0 in __GI___pthread_mutex_lock (mutex=0x7f47f4000a60) at ../nptl/pthread_mutex_lock.c:146
#1  0x00007f485fe51981 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f485fe0f87b in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f485fe0ff52 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f485fe100ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4866b1c7be in QEventDispatcherGlib::processEvents (this=0x7f47f40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007f4866aee0af in QEventLoop::processEvents (this=this@entry=0x7f47f92efda0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f4866aee3a5 in QEventLoop::exec (this=this@entry=0x7f47f92efda0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f48669eac5f in QThread::exec (this=this@entry=0x252b0a0) at thread/qthread.cpp:537
#9  0x00007f4866acf823 in QInotifyFileSystemWatcherEngine::run (this=0x252b0a0) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007f48669ed32f in QThreadPrivate::start (arg=0x252b0a0) at thread/qthread_unix.cpp:349
#11 0x00007f48602ef182 in start_thread (arg=0x7f47f92f0700) at pthread_create.c:312
#12 0x00007f48663a347d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f47f335d700 (LWP 3180)):
#0  0x00007f486639612d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f485fe0ffe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f485fe100ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4866b1c7be in QEventDispatcherGlib::processEvents (this=0x7f47ec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007f4866aee0af in QEventLoop::processEvents (this=this@entry=0x7f47f335cde0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f4866aee3a5 in QEventLoop::exec (this=this@entry=0x7f47f335cde0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f48669eac5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#7  0x00007f48669ed32f in QThreadPrivate::start (arg=0x1feee80) at thread/qthread_unix.cpp:349
#8  0x00007f48602ef182 in start_thread (arg=0x7f47f335d700) at pthread_create.c:312
#9  0x00007f48663a347d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f4868e2c800 (LWP 3156)):
[KCrash Handler]
#6  operator QItemSelectionModel* (this=<error reading variable: Cannot access memory at address 0xa0000000a>) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:78
#7  QAbstractItemView::selectionModel (this=0xa00000002) at itemviews/qabstractitemview.cpp:766
#8  0x00007f47fe6c65be in MailCommon::FolderTreeWidget::selectedCollections (this=<optimized out>) at ../../mailcommon/folder/foldertreewidget.cpp:243
#9  0x00007f47fea619db in KMMainWidget::updateFolderMenu (this=0x2b4eb00) at ../../kmail/kmmainwidget.cpp:4105
#10 0x00007f47fea626dc in KMMainWidget::slotUpdateActionsAfterMailChecking (this=<optimized out>) at ../../kmail/kmmainwidget.cpp:441
#11 0x00007f47feb3c33a in KMMainWidget::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at moc_kmmainwidget.cpp:526
#12 0x00007f4866b0387a in QMetaObject::activate (sender=0x2b4ed50, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#13 0x00007f4866b07a31 in QObject::event (this=0x2b4ed50, e=<optimized out>) at kernel/qobject.cpp:1156
#14 0x00007f48674e1e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1d8a860, receiver=receiver@entry=0x2b4ed50, e=e@entry=0x7ffd3ac94d40) at kernel/qapplication.cpp:4567
#15 0x00007f48674e84a0 in QApplication::notify (this=this@entry=0x7ffd3ac959f0, receiver=receiver@entry=0x2b4ed50, e=e@entry=0x7ffd3ac94d40) at kernel/qapplication.cpp:4353
#16 0x00007f48681eccca in KApplication::notify (this=0x7ffd3ac959f0, receiver=0x2b4ed50, event=0x7ffd3ac94d40) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f4866aef4dd in QCoreApplication::notifyInternal (this=0x7ffd3ac959f0, receiver=0x2b4ed50, event=0x7ffd3ac94d40) at kernel/qcoreapplication.cpp:953
#18 0x00007f4866b1f323 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QTimerInfoList::activateTimers (this=0x1d83860) at kernel/qeventdispatcher_unix.cpp:621
#20 0x00007f4866b1c629 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:193
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:240
#22 0x00007f485fe0fe04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f485fe10048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f485fe100ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f4866b1c7a1 in QEventDispatcherGlib::processEvents (this=0x1d49bb0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#26 0x00007f4867583be6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f4866aee0af in QEventLoop::processEvents (this=this@entry=0x7ffd3ac94fb0, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f4866aee3a5 in QEventLoop::exec (this=0x7ffd3ac94fb0, flags=...) at kernel/qeventloop.cpp:204
#29 0x00007f4866f7aaf3 in KJob::exec (this=this@entry=0x2437f70) at ../../kdecore/jobs/kjob.cpp:210
#30 0x00007f47fea2eb56 in KMKernel::cleanup (this=0x23dae70) at ../../kmail/kmkernel.cpp:1311
#31 0x00007f47fede9e48 in KMailPart::~KMailPart (this=this@entry=0x21f8e20, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at ../../kmail/kmail_part.cpp:119
#32 0x00007f47fede9f29 in KMailPart::~KMailPart (this=0x21f8e20, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at ../../kmail/kmail_part.cpp:121
#33 0x00007f4868a67d2e in KontactInterface::Plugin::~Plugin (this=0x2203720, __vtt_parm=<optimized out>, __in_chrg=<optimized out>) at ../../kontactinterface/plugin.cpp:92
#34 0x00007f4801655d26 in KMailPlugin::~KMailPlugin (this=0x2203720, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at ../../../../kontact/plugins/kmail/kmail_plugin.cpp:173
#35 0x00007f4801655d49 in KMailPlugin::~KMailPlugin (this=0x2203720, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at ../../../../kontact/plugins/kmail/kmail_plugin.cpp:177
#36 0x00007f486862ef8e in Kontact::MainWindow::~MainWindow (this=this@entry=0x1f14ac0, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at ../../../kontact/src/mainwindow.cpp:296
#37 0x00007f486862f0e9 in Kontact::MainWindow::~MainWindow (this=0x1f14ac0, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at ../../../kontact/src/mainwindow.cpp:298
#38 0x00007f4866b07c58 in QObject::event (this=this@entry=0x1f14ac0, e=e@entry=0x5eef660) at kernel/qobject.cpp:1175
#39 0x00007f486753156b in QWidget::event (this=this@entry=0x1f14ac0, event=event@entry=0x5eef660) at kernel/qwidget.cpp:8846
#40 0x00007f48678eba33 in QMainWindow::event (this=this@entry=0x1f14ac0, event=event@entry=0x5eef660) at widgets/qmainwindow.cpp:1478
#41 0x00007f48682a1441 in KMainWindow::event (this=this@entry=0x1f14ac0, ev=ev@entry=0x5eef660) at ../../kdeui/widgets/kmainwindow.cpp:1084
#42 0x00007f48682d8ed9 in KXmlGuiWindow::event (this=0x1f14ac0, ev=0x5eef660) at ../../kdeui/xmlgui/kxmlguiwindow.cpp:126
#43 0x00007f48674e1e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1d8a860, receiver=receiver@entry=0x1f14ac0, e=e@entry=0x5eef660) at kernel/qapplication.cpp:4567
#44 0x00007f48674e84a0 in QApplication::notify (this=this@entry=0x7ffd3ac959f0, receiver=receiver@entry=0x1f14ac0, e=e@entry=0x5eef660) at kernel/qapplication.cpp:4353
#45 0x00007f48681eccca in KApplication::notify (this=0x7ffd3ac959f0, receiver=0x1f14ac0, event=0x5eef660) at ../../kdeui/kernel/kapplication.cpp:311
#46 0x00007f4866aef4dd in QCoreApplication::notifyInternal (this=0x7ffd3ac959f0, receiver=receiver@entry=0x1f14ac0, event=event@entry=0x5eef660) at kernel/qcoreapplication.cpp:953
#47 0x00007f4866af2b3d in sendEvent (event=0x5eef660, receiver=0x1f14ac0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#48 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1d482b0) at kernel/qcoreapplication.cpp:1577
#49 0x00007f4866af2fe3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#50 0x00007f4866b1cf83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#51 postEventSourceDispatch (s=0x1d85060) at kernel/qeventdispatcher_glib.cpp:287
#52 0x00007f485fe0fe04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#53 0x00007f485fe10048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#54 0x00007f485fe100ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#55 0x00007f4866b1c7a1 in QEventDispatcherGlib::processEvents (this=0x1d49bb0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#56 0x00007f4867583be6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#57 0x00007f4866aee0af in QEventLoop::processEvents (this=this@entry=0x7ffd3ac958f0, flags=...) at kernel/qeventloop.cpp:149
#58 0x00007f4866aee3a5 in QEventLoop::exec (this=this@entry=0x7ffd3ac958f0, flags=...) at kernel/qeventloop.cpp:204
#59 0x00007f4866af3b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#60 0x00007f48674e037c in QApplication::exec () at kernel/qapplication.cpp:3828
#61 0x0000000000403660 in main (argc=1, argv=0x7ffd3ac95b38) at ../../../kontact/src/main.cpp:219

The reporter indicates this bug may be a duplicate of or related to bug 360227.

Possible duplicates by query: bug 360227, bug 357243.

Reported using DrKonqi