Application: plasma-desktop (4.11.22)
KDE Platform Version: 4.14.32
Qt Version: 4.8.7
Operating System: Linux 4.9.68-wifislax64 x86_64

-- Information about the crash:
I was using Bleachbit and I opened the Dolphin and I do not know what else to write because I was not doing anything else.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Shell de escritorio Plasma (plasma-desktop), signal: Bus error
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f35be321780 (LWP 2400))]

Thread 3 (Thread 0x7f35051cd700 (LWP 2404)):
#0  0x00007f35bae612fd in poll () at /lib64/libc.so.6
#1  0x00007f35b7584964 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f35b7584a6c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f35bccfa0ce in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/qt/lib/libQtCore.so.4
#4  0x00007f35bccca5d1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/qt/lib/libQtCore.so.4
#5  0x00007f35bccca8e5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/qt/lib/libQtCore.so.4
#6  0x00007f35bcbc3c39 in QThread::exec() () at /usr/lib64/qt/lib/libQtCore.so.4
#7  0x00007f35bccab733 in  () at /usr/lib64/qt/lib/libQtCore.so.4
#8  0x00007f35bcbc63bc in  () at /usr/lib64/qt/lib/libQtCore.so.4
#9  0x00007f35bc925684 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f35bae6ceed in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f359346b700 (LWP 2401)):
#0  0x00007f35bc92b36f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f35ae8c95aa in  () at /usr/lib64/qt/lib/libQtScript.so.4
#2  0x00007f35ae8c95d9 in  () at /usr/lib64/qt/lib/libQtScript.so.4
#3  0x00007f35bc925684 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f35bae6ceed in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f35be321780 (LWP 2400)):
[KCrash Handler]
#6  0x00007f35bae050e0 in __memcpy_sse2_unaligned () at /lib64/libc.so.6
#7  0x00007f35bcc3ef82 in QBuffer::readData(char*, long long) () at /usr/lib64/qt/lib/libQtCore.so.4
#8  0x00007f35bcc57436 in QIODevice::read(char*, long long) () at /usr/lib64/qt/lib/libQtCore.so.4
#9  0x00007f35bcc3fea5 in QDataStream::operator>>(int&) () at /usr/lib64/qt/lib/libQtCore.so.4
#10 0x00007f35bd4c4683 in KSycocaDict::Private::offsetForKey(QString const&) const () at /usr/lib64/libkdecore.so.5
#11 0x00007f35bd4c47e8 in KSycocaDict::find_string(QString const&) const () at /usr/lib64/libkdecore.so.5
#12 0x00007f35bd424cee in KMimeTypeTrader::query(QString const&, QString const&, QString const&) const () at /usr/lib64/libkdecore.so.5
#13 0x00007f35b3777d20 in KFileItemActions::associatedApplications(QStringList const&, QString const&) () at /usr/lib64/libkio.so.5
#14 0x00007f35b37791ed in KFileItemActions::preferredOpenWithAction(QString const&) () at /usr/lib64/libkio.so.5
#15 0x00007f359b6b0b93 in  () at /usr/lib64/kde4/plasma_applet_folderview.so
#16 0x00007f3595ac315f in  () at /usr/lib64/kde4/plasma_containmentactions_contextmenu.so
#17 0x00007f35b11bbaf0 in  () at /usr/lib64/libplasma.so.3
#18 0x00007f35b11bbd8e in  () at /usr/lib64/libplasma.so.3
#19 0x00007f35b11c419b in Plasma::Containment::contextMenuEvent(QGraphicsSceneContextMenuEvent*) () at /usr/lib64/libplasma.so.3
#20 0x00007f35bc3dc2b1 in QGraphicsItem::sceneEvent(QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#21 0x00007f35bc4022ea in QGraphicsScene::contextMenuEvent(QGraphicsSceneContextMenuEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#22 0x00007f35bc41753c in QGraphicsScene::event(QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#23 0x00007f35bbe2148c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#24 0x00007f35bbe27f5c in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#25 0x00007f35bdd2a8aa in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#26 0x00007f35bcccbc0d in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtCore.so.4
#27 0x00007f35bc42f207 in QGraphicsView::contextMenuEvent(QContextMenuEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#28 0x00007f35bbe744d0 in QWidget::event(QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#29 0x00007f35bc21bfae in QFrame::event(QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#30 0x00007f35bc42ecbf in QGraphicsView::viewportEvent(QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#31 0x00007f35bcccbd76 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtCore.so.4
#32 0x00007f35bbe2146c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#33 0x00007f35bbe287f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#34 0x00007f35bdd2a8aa in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#35 0x00007f35bcccbc0d in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtCore.so.4
#36 0x00007f35bbe9eb66 in  () at /usr/lib64/qt/lib/libQtGui.so.4
#37 0x00007f35bbe9cdf5 in QApplication::x11ProcessEvent(_XEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#38 0x00007f35bbec4942 in  () at /usr/lib64/qt/lib/libQtGui.so.4
#39 0x00007f35b7584797 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#40 0x00007f35b75849c8 in  () at /usr/lib64/libglib-2.0.so.0
#41 0x00007f35b7584a6c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#42 0x00007f35bccfa0ae in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/qt/lib/libQtCore.so.4
#43 0x00007f35bbec49e6 in  () at /usr/lib64/qt/lib/libQtGui.so.4
#44 0x00007f35bccca5d1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/qt/lib/libQtCore.so.4
#45 0x00007f35bccca8e5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/qt/lib/libQtCore.so.4
#46 0x00007f35bcccfec9 in QCoreApplication::exec() () at /usr/lib64/qt/lib/libQtCore.so.4
#47 0x00007f35a74b1874 in kdemain () at /usr/lib64/libkdeinit4_plasma-desktop.so
#48 0x0000000000408c21 in  ()
#49 0x00000000004099f7 in  ()
#50 0x000000000040a13a in  ()
#51 0x0000000000405952 in  ()
#52 0x00007f35bad867d0 in __libc_start_main () at /lib64/libc.so.6
#53 0x00000000004067b9 in _start ()

Reported using DrKonqi