Description:
Knotes crashes on "Delete selected" command.
And it don't show previous notes (russian text) but black square.

Additional info:
* package version(s)
knotes 15.12.1-1
* config and/or log files etc.
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff3426947 in QObjectPrivate::connectImpl(QObject const*, int, QObject const*, void**, QtPrivate::QSlotObjectBase*, Qt::ConnectionType, int const*, QMetaObject const*) ()
from /usr/lib/libQt5Core.so.5
(gdb) bt
#0 0x00007ffff3426947 in QObjectPrivate::connectImpl(QObject const*, int, QObject const*, void**, QtPrivate::QSlotObjectBase*, Qt::ConnectionType, int const*, QMetaObject const*) ()
from /usr/lib/libQt5Core.so.5
#1 0x00007ffff3426d9a in QObject::connectImpl(QObject const*, void**, QObject const*, void**, QtPrivate::QSlotObjectBase*, Qt::ConnectionType, int const*, QMetaObject const*) ()
from /usr/lib/libQt5Core.so.5
#2 0x000000000042d952 in KNoteDeleteSelectedNotesDialog::KNoteDeleteSelectedNotesDialog(QWidget*) ()
#3 0x000000000042371e in KNotesApp::slotDeleteSelectedNotes() ()
#4 0x00007ffff34231a7 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#5 0x00007ffff3cddd92 in QAction::triggered(bool) () from /usr/lib/libQt5Widgets.so.5
#6 0x00007ffff3ce0218 in QAction::activate(QAction::ActionEvent) () from /usr/lib/libQt5Widgets.so.5
#7 0x00007ffff3ce079f in ?? () from /usr/lib/libQt5Widgets.so.5
#8 0x00007ffff34241e1 in QObject::event(QEvent*) () from /usr/lib/libQt5Core.so.5
#9 0x00007ffff3ce0aa1 in QAction::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5
#10 0x00007ffff3ce79ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#11 0x00007ffff3cece86 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#12 0x00007ffff33f4bab in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#13 0x00007ffff33f6fa6 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQt5Core.so.5
#14 0x00007ffff344b143 in ?? () from /usr/lib/libQt5Core.so.5
#15 0x00007fffeb76fdc7 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#16 0x00007fffeb770020 in ?? () from /usr/lib/libglib-2.0.so.0
#17 0x00007fffeb7700cc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#18 0x00007ffff344b54f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#19 0x00007ffff33f257a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#20 0x00007ffff33fa53c in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#21 0x000000000041d169 in main ()


Steps to reproduce:
Run knotes, klick left button on icon, say Delete selected.