Application: kactivitymanagerd (3.0)
KDE Platform Version: 4.14.3 (Compiled from sources)
Qt Version: 4.8.6
Operating System: NetBSD 6.1.3 amd64
Distribution (Platform): NetBSD pkgsrc

-- Information about the crash:
- What I was doing when the application crashed:
Opening a pdf file with Okular. 
- Unusual behavior I noticed:
Crash continues appearing even when Okular can display the file(s)

The crash can be reproduced every time.

-- Backtrace:
Application: KDE Activity Manager (kactivitymanagerd), signal: Segmentation fault
[KCrash Handler]
#7  0x00007f7ff64c15d9 in QThread::exit(int) () from /usr/pkg/qt4/lib/libQtCore.so.4
#8  0x00007f7fe3e0b2db in ActivityRankingPlugin::~ActivityRankingPlugin (this=<optimized out>, __in_chrg=<optimized out>) at /work/x11/kactivities/work/kactivities-4.13.3/src/service/plugins/activityranking/ActivityRankingPlugin.cpp:73
#9  0x00007f7fe3e0b317 in ActivityRankingPlugin::~ActivityRankingPlugin (this=0x7f7ff63359a0, __in_chrg=<optimized out>) at /work/x11/kactivities/work/kactivities-4.13.3/src/service/plugins/activityranking/ActivityRankingPlugin.cpp:75
#10 0x000000000040919d in create<Plugin> (args=..., parent=0x7f7ff7b09aa0, this=<optimized out>) at /work/x11/kactivities/work/.buildlink/include/kpluginfactory.h:511
#11 Application::loadPlugins (this=0x7f7ff7b09aa0) at /work/x11/kactivities/work/kactivities-4.13.3/src/service/Application.cpp:161
#12 0x00007f7ff65c0bb5 in QObject::event(QEvent*) () from /usr/pkg/qt4/lib/libQtCore.so.4
#13 0x00007f7ff551daf0 in QApplication::event(QEvent*) () from /usr/pkg/qt4/lib/libQtGui.so.4
#14 0x00007f7ff551b780 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/pkg/qt4/lib/libQtGui.so.4
#15 0x00007f7ff551fe64 in QApplication::notify(QObject*, QEvent*) () from /usr/pkg/qt4/lib/libQtGui.so.4
#16 0x00007f7ff703c110 in KApplication::notify (this=0x7f7ff7b09aa0, receiver=0x7f7ff7b09aa0, event=0x7f7ff6d70f20) at /work/x11/kdelibs4/work/kdelibs-4.14.3/kdeui/kernel/kapplication.cpp:311
#17 0x00007f7ff65ae04c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/pkg/qt4/lib/libQtCore.so.4
#18 0x00007f7ff65b0ea5 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/pkg/qt4/lib/libQtCore.so.4
#19 0x00007f7ff55b3605 in QEventDispatcherX11::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/pkg/qt4/lib/libQtGui.so.4
#20 0x00007f7ff65acf1e in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/pkg/qt4/lib/libQtCore.so.4
#21 0x00007f7ff65ad17f in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/pkg/qt4/lib/libQtCore.so.4
#22 0x00007f7ff65b11f1 in QCoreApplication::exec() () from /usr/pkg/qt4/lib/libQtCore.so.4
#23 0x0000000000408724 in main (argc=1, argv=0x7f7fffffdbe8) at /work/x11/kactivities/work/kactivities-4.13.3/src/service/Application.cpp:236

Reported using DrKonqi