SUMMARY
I was pressing esc because I was trying to navigate between the shelves and the primary menu, and eventually I got this crash.

Cannot figure out how to reproduce.

Thread 1 (Thread 0x7ffff20e88c0 (LWP 3348751)):
#0  0x00007ffff08f4b64 in QQuickShortcutContext::matcher(QObject*, Qt::ShortcutContext) () from /usr/lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#1  0x00007ffff683d74f in QShortcutMap::find(QKeyEvent*, int) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#2  0x00007ffff6840524 in QShortcutMap::nextState(QKeyEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#3  0x00007ffff68417c9 in QShortcutMap::tryShortcut(QKeyEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#4  0x00007ffff67eec72 in QWindowSystemInterface::handleShortcutEvent(QWindow*, unsigned long, int, QFlags<Qt::KeyboardModifier>, unsigned int, unsigned int, unsigned int, QString const&, bool, unsigned short) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#5  0x00007ffff680e881 in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#6  0x00007ffff6813b3b in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#7  0x00007ffff67eb7ac in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#8  0x00007ffff1cd6d7e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#9  0x00007ffff4cd4fbd in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007ffff4cd5240 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007ffff4cd52e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007ffff648afa2 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007ffff642f1ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007ffff6437354 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x000055555555b8dd in PeruseHelpers::init (path=..., app=..., filename=...) at /home/wolthera/Peruse/src/src/common/peruse_helpers.cpp:105
#16 0x0000555555559b97 in main (argc=1, argv=0x7fffffffe198) at /home/wolthera/Peruse/src/src/app/main.cpp:83
(gdb)