-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7faa52e818c0 (LWP 7925))]

Thread 3 (Thread 0x7faa44ae9700 (LWP 7927)):
#0  0x00007faa6472be8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007faa5af2039c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faa5af204ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faa5f534a9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007faa5f4dbdea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007faa5f2f88a4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007faa5f2fd84e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007faa5baab6fa in start_thread (arg=0x7faa44ae9700) at pthread_create.c:333
#8  0x00007faa64737b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7faa5001a700 (LWP 7926)):
#0  0x00007faa6472be8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007faa58e99c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007faa58e9b8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007faa5299e629 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007faa5f2fd84e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007faa5baab6fa in start_thread (arg=0x7faa5001a700) at pthread_create.c:333
#6  0x00007faa64737b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7faa52e818c0 (LWP 7925)):
[KCrash Handler]
#6  0x00007faa637d8ac3 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOFileWidgets.so.5
#7  0x00007faa637dc3d0 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOFileWidgets.so.5
#8  0x00007faa5f50cfca in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007faa5ffda95f in QActionGroup::triggered(QAction*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007faa5ffdb5d9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007faa5f50cfca in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007faa5ffd7412 in QAction::triggered(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007faa5ffd9898 in QAction::activate(QAction::ActionEvent) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007faa6015be22 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007faa601620bc in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007faa60166030 in QMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007faa60023f88 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007faa60166a83 in QMenu::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007faa5ffe105c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007faa5ffe6c19 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007faa5f4de62b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007faa5ffe5b32 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007faa6003e8dd in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007faa60040b3b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007faa5ffe105c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007faa5ffe6516 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007faa5f4de62b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007faa5fa30521 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#29 0x00007faa5fa321e5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#30 0x00007faa5fa15f38 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#31 0x00007faa529d0070 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#32 0x00007faa5af201a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007faa5af20400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007faa5af204ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007faa5f534a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007faa5f4dbdea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007faa60160e10 in QMenu::exec(QPoint const&, QAction*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#38 0x00007faa64a4fe8b in DolphinContextMenu::openViewportContextMenu (this=0x1aec150) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/dolphincontextmenu.cpp:366
#39 0x00007faa64a5024b in DolphinContextMenu::open (this=0x1aec150) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/dolphincontextmenu.cpp:116
#40 0x00007faa64a45e84 in DolphinMainWindow::openContextMenu (this=0x1b65920, pos=..., item=..., url=..., customActions=...) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/dolphinmainwindow.cpp:759
#41 0x00007faa5f50ce4f in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#42 0x00007faa643f08d4 in DolphinView::requestContextMenu (this=this@entry=0x1f481c0, _t1=..., _t2=..., _t3=..., _t4=...) at /build/dolphin-HvGmRr/dolphin-15.12.3/obj-x86_64-linux-gnu/src/moc_dolphinview.cpp:927
#43 0x00007faa643cc272 in DolphinView::slotViewContextMenuRequested (this=0x1f481c0, pos=...) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/views/dolphinview.cpp:862
#44 0x00007faa5f50ce4f in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x00007faa643eecf5 in KItemListController::viewContextMenuRequested (this=this@entry=0x1f802e0, _t1=...) at /build/dolphin-HvGmRr/dolphin-15.12.3/obj-x86_64-linux-gnu/src/moc_kitemlistcontroller.cpp:427
#46 0x00007faa6438e92c in KItemListController::mousePressEvent (this=0x1f802e0, event=0x7ffd14770f60, transform=...) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/kitemviews/kitemlistcontroller.cpp:632
#47 0x00007faa6438dbf4 in KItemListController::processEvent (this=0x1f802e0, event=event@entry=0x7ffd14770f60, transform=...) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/kitemviews/kitemlistcontroller.cpp:1010
#48 0x00007faa643a01b2 in KItemListView::event (this=0x1f4de20, event=0x7ffd14770f60) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/kitemviews/kitemlistview.cpp:907
#49 0x00007faa5ffe105c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#50 0x00007faa5ffe6516 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#51 0x00007faa5f4de62b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#52 0x00007faa603054b3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#53 0x00007faa60305f61 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#54 0x00007faa6030e716 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#55 0x00007faa6030eb59 in QGraphicsScene::mousePressEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#56 0x00007faa603180e0 in QGraphicsScene::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#57 0x00007faa5ffe105c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#58 0x00007faa5ffe6516 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#59 0x00007faa5f4de62b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#60 0x00007faa60331abf in QGraphicsView::mousePressEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#61 0x00007faa600243cf in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#62 0x00007faa60122b5e in QFrame::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#63 0x00007faa60332eb3 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#64 0x00007faa5f4de412 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#65 0x00007faa5ffe103c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#66 0x00007faa5ffe6c19 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#67 0x00007faa5f4de62b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#68 0x00007faa5ffe5b32 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#69 0x00007faa6003e57b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#70 0x00007faa60040b3b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#71 0x00007faa5ffe105c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#72 0x00007faa5ffe6516 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#73 0x00007faa5f4de62b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#74 0x00007faa5fa30521 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#75 0x00007faa5fa321e5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#76 0x00007faa5fa15f38 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#77 0x00007faa529d0070 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#78 0x00007faa5af201a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#79 0x00007faa5af20400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#80 0x00007faa5af204ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#81 0x00007faa5f534a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#82 0x00007faa5f4dbdea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#83 0x00007faa5f4e3e8c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#84 0x00007faa64a57e2b in kdemain (argc=1, argv=<optimized out>) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/main.cpp:150
#85 0x00007faa64651830 in __libc_start_main (main=0x400710 <main(int, char**)>, argc=1, argv=0x7ffd14771f38, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd14771f28) at ../csu/libc-start.c:291
#86 0x0000000000400749 in _start ()

Reproducible: Sometimes

Steps to Reproduce:
1. Click right-mouse button
2. Create Folder

Actual Results:  
Crash


kubuntu 16.04