Core dumps when fuzzing

[futuretap]

In "Step 3" after choosing an endpoint, the app crashes.

Here's a backtrace from the core dump:

#0  0x0000000000000000 in ?? ()
#1  0x00007fe10ddbab8f in QOpenGLContext::makeCurrent(QSurface*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Gui.so.5
#2  0x00007fe0fe61b5e3 in ?? () from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5QuickWidgets.so.5
#3  0x00007fe0fe61bd70 in QQuickWidget::showEvent(QShowEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5QuickWidgets.so.5
#4  0x00007fe1068e4fd9 in ?? () from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5WebEngineWidgets.so.5
#5  0x00007fe10e5929b8 in QWidget::event(QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#6  0x00007fe1068e520b in ?? () from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5WebEngineWidgets.so.5
#7  0x00007fe10e5565ec in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#8  0x00007fe10e55da17 in QApplication::notify(QObject*, QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#9  0x00007fe10ef9f24e in sipQApplication::notify(QObject*, QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/QtWidgets.so
#10 0x00007fe10d7922b8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Core.so.5
#11 0x00007fe10e58f963 in QWidgetPrivate::show_helper() ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#12 0x00007fe10e592505 in QWidget::setVisible(bool) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#13 0x00007fe10e578147 in QStackedLayout::setCurrentIndex(int) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#14 0x00007fe10e5787ca in QStackedLayout::insertWidget(int, QWidget*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#15 0x00007fe10e578815 in QStackedLayout::addItem(QLayoutItem*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#16 0x00007fe1068e48ba in ?? () from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5WebEngineWidgets.so.5
#17 0x00007fe1068e2bd4 in ?? () from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5WebEngineWidgets.so.5
#18 0x00007fe1068e3826 in QWebEngineView::page() const ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5WebEngineWidgets.so.5
#19 0x00007fe1068e3ff1 in QWebEngineView::showEvent(QShowEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5WebEngineWidgets.so.5
#20 0x00007fe106b18a83 in sipQWebEngineView::showEvent(QShowEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/QtWebEngineWidgets.so
#21 0x00007fe10e5929b8 in QWidget::event(QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#22 0x00007fe106b172f3 in sipQWebEngineView::event(QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/QtWebEngineWidgets.so
#23 0x00007fe10e5565ec in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#24 0x00007fe10e55da17 in QApplication::notify(QObject*, QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#25 0x00007fe10ef9f24e in sipQApplication::notify(QObject*, QEvent*) ()
   from /usr/local/lib/python3.5/dist-packages/PyQt5/QtWidgets.so

Is there perhaps some library or Python module missing?