Application: konsole (16.08.1)
 (Compiled from sources)
Qt Version: 5.6.1
Frameworks Version: 5.26.0
Operating System: Linux 4.8.0-gentoo x86_64
Distribution: "Gentoo Base System release 2.3"

-- Information about the crash:
1. Detached tab from one console.
2. Detached another tab from the same console
3. Opened a new empty tab in window from p.2
4. Drag'n'drop tab from p.2 to detached Window from p.1

-- Backtrace:
Application: Konsole (konsole), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5dddd437c0 (LWP 4700))]

Thread 2 (Thread 0x7f5dda9c3700 (LWP 4703)):
#0  0x00007f5dee632d6d in poll () from /lib64/libc.so.6
#1  0x00007f5de60cffdc in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f5de60d00ec in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f5deb298ecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f5deb248d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f5deb0a7e14 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007f5deec225c5 in QDBusConnectionManager::run() () from /usr/lib64/libQt5DBus.so.5
#7  0x00007f5deb0ac2bc in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#8  0x00007f5de7b61434 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f5dee63bded in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f5dddd437c0 (LWP 4700)):
[KCrash Handler]
#6  0x00007f5debd5a94d in QAction::~QAction() () from /usr/lib64/libQt5Widgets.so.5
#7  0x00007f5debdac51d in QWidgetAction::~QWidgetAction() () from /usr/lib64/libQt5Widgets.so.5
#8  0x00007f5dec9e1828 in KSelectAction::~KSelectAction() () from /usr/lib64/libKF5WidgetsAddons.so.5
#9  0x00007f5ded344b29 in KCodecAction::~KCodecAction() () from /usr/lib64/libKF5ConfigWidgets.so.5
#10 0x00007f5deb278305 in QObjectPrivate::deleteChildren() () from /usr/lib64/libQt5Core.so.5
#11 0x00007f5deb279249 in QObject::~QObject() () from /usr/lib64/libQt5Core.so.5
#12 0x00007f5dee2c9989 in Konsole::SessionController::~SessionController() () from /usr/lib64/libkonsoleprivate.so.16
#13 0x00007f5dee2c99c9 in Konsole::SessionController::~SessionController() () from /usr/lib64/libkonsoleprivate.so.16
#14 0x00007f5deb278305 in QObjectPrivate::deleteChildren() () from /usr/lib64/libQt5Core.so.5
#15 0x00007f5deb279249 in QObject::~QObject() () from /usr/lib64/libQt5Core.so.5
#16 0x00007f5dee2edb09 in Konsole::ViewManager::~ViewManager() () from /usr/lib64/libkonsoleprivate.so.16
#17 0x00007f5deb278305 in QObjectPrivate::deleteChildren() () from /usr/lib64/libQt5Core.so.5
#18 0x00007f5debda4c14 in QWidget::~QWidget() () from /usr/lib64/libQt5Widgets.so.5
#19 0x00007f5dedb6c841 in KMainWindow::~KMainWindow() () from /usr/lib64/libKF5XmlGui.so.5
#20 0x00007f5dee924eae in Konsole::MainWindow::~MainWindow() () from /usr/lib64/libkdeinit5_konsole.so
#21 0x00007f5deb272938 in QObject::event(QEvent*) () from /usr/lib64/libQt5Core.so.5
#22 0x00007f5debda93bb in QWidget::event(QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#23 0x00007f5debea397b in QMainWindow::event(QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#24 0x00007f5dedb6ece7 in KMainWindow::event(QEvent*) () from /usr/lib64/libKF5XmlGui.so.5
#25 0x00007f5dedbb3675 in KXmlGuiWindow::event(QEvent*) () from /usr/lib64/libKF5XmlGui.so.5
#26 0x00007f5debd63fbc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#27 0x00007f5debd694c6 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#28 0x00007f5deb249eca in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#29 0x00007f5deb24bf1a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQt5Core.so.5
#30 0x00007f5deb298e33 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib64/libQt5Core.so.5
#31 0x00007f5de60cfde7 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#32 0x00007f5de60d0040 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#33 0x00007f5de60d00ec in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#34 0x00007f5deb298eaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#35 0x00007f5deb248d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#36 0x00007f5deb25082c in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
#37 0x00007f5dee914da5 in kdemain () from /usr/lib64/libkdeinit5_konsole.so
#38 0x00007f5dee574710 in __libc_start_main () from /lib64/libc.so.6
#39 0x0000000000400779 in _start ()

Reported using DrKonqi