Crash while editing

Thread 1 "qtcreator" received signal SIGSEGV, Segmentation fault.
TextEditor::FunctionHintProposalWidget::abort (this=0x55555a1ae150) at codeassist/functionhintproposalwidget.cpp:230
230         if (proposalIsVisible())
(gdb) bt
#0  TextEditor::FunctionHintProposalWidget::abort (this=0x55555a1ae150) at codeassist/functionhintproposalwidget.cpp:230
#1  0x00007ffff64ddd58 in QtPrivate::QSlotObjectBase::call (a=0x7fffffffcd40, r=0x55555a1ae150, this=<optimized out>)
    at qtbase/include/QtCore/../../../../qtbase/src/corelib/kernel/qobjectdefs_impl.h:399
#2  doActivate<false> (sender=0x55555a1fa860, signal_index=0, argv=argv@entry=0x7fffffffcd40) at ../qtbase/src/corelib/kernel/qobject.cpp:3930
#3  0x00007ffff64d6218 in QMetaObject::activate (sender=sender@entry=0x55555a1fa860, m=m@entry=0x7ffff6927b00 <QObject::staticMetaObject>,
    local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffffffcd40) at ../qtbase/src/corelib/kernel/qobject.cpp:3990
#4  0x00007ffff64d62d3 in QObject::destroyed (this=this@entry=0x55555a1fa860, _t1=<optimized out>, _t1@entry=0x55555a1fa860) at qtbase/src/corelib/kernel/moc_qobject.cpp:218
#5  0x00007ffff64dbf46 in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at ../qtbase/src/corelib/kernel/qobject.cpp:1009
#6  0x00007ffff760d69c in QWidget::~QWidget (this=0x55555a1fa860, __in_chrg=<optimized out>) at ../qtbase/src/widgets/kernel/qwidget.cpp:1403
#7  0x00007ffff7e699e5 in Utils::FakeToolTip::~FakeToolTip (this=0x55555a1fa860, __in_chrg=<optimized out>) at .moc/release-shared/../../faketooltip.h:34
#8  Utils::FakeToolTip::~FakeToolTip (this=0x55555a1fa860, __in_chrg=<optimized out>) at .moc/release-shared/../../faketooltip.h:34
#9  0x00007ffff64ce393 in QObject::event (this=0x55555a1fa860, e=0x55555a1e9a20) at ../qtbase/src/corelib/kernel/qobject.cpp:1354
#10 0x00007ffff75b80e6 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x55555a1fa860, e=0x55555a1e9a20)
    at ../qtbase/src/widgets/kernel/qapplication.cpp:3336
#11 0x00007ffff647b19a in QCoreApplication::notifyInternal2 (receiver=0x55555a1fa860, event=0x55555a1e9a20) at ../qtbase/src/corelib/kernel/qcoreapplication.cpp:1067
#12 0x00007ffff647e55c in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x5555555b15b0) at ../qtbase/src/corelib/kernel/qcoreapplication.cpp:1847
#13 0x00007ffff6732e47 in postEventSourceDispatch (s=0x55555561b410) at ../qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:279
#14 0x00007ffff55748eb in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007ffff55c7d28 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007ffff5572023 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007ffff673275e in QEventDispatcherGlib::processEvents (this=0x555555618770, flags=...) at ../qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:429
#18 0x00007ffff6487fab in QEventLoop::exec (this=this@entry=0x7fffffffd250, flags=..., flags@entry=...)
    at qtbase/include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:70
#19 0x00007ffff6483946 in QCoreApplication::exec () at qtbase/include/QtCore/../../../../qtbase/src/corelib/global/qflags.h:110
#20 0x00007ffff6d54f50 in QGuiApplication::exec () at ../qtbase/src/gui/kernel/qguiapplication.cpp:1862
#21 0x00007ffff75b8059 in QApplication::exec () at ../qtbase/src/widgets/kernel/qapplication.cpp:2617
#22 0x0000555555561a93 in main (argc=<optimized out>, argv=<optimized out>) at main.cpp:771