(gdb) bt
#0  0x0000555555a530ed in QXcbKeyboard::updateVModMapping() ()
#1  0x0000555555a535c8 in QXcbKeyboard::QXcbKeyboard(QXcbConnection*) ()
#2  0x0000555555a6845d in QXcbConnection::QXcbConnection(QXcbNativeInterface*, bool, char const*) ()
#3  0x0000555555a523ef in QXcbIntegration::QXcbIntegration(QStringList const&, int&, char**) ()
#4  0x0000555555a5149b in QXcbIntegrationPlugin::create(QString const&, QStringList const&, int&, char**) ()
#5  0x0000555556111b43 in QPlatformIntegrationFactory::create(QString const&, QStringList const&, int&, char**, QString const&) ()
#6  0x0000555555f04486 in QGuiApplicationPrivate::createPlatformIntegration() ()
#7  0x0000555555f052c5 in QGuiApplicationPrivate::createEventDispatcher() ()
#8  0x000055555637c010 in QCoreApplication::init() ()
#9  0x000055555637c085 in QCoreApplication::QCoreApplication(QCoreApplicationPrivate&) ()
#10 0x0000555555f05c39 in QGuiApplication::QGuiApplication(QGuiApplicationPrivate&) ()
#11 0x0000555555bca162 in QApplication::QApplication(int&, char**, int) ()
#12 0x00005555556adb52 in BitcoinApplication::BitcoinApplication (this=0x7fffffffd930, argc=<optimized out>, argv=<optimized out>) at qt/bitcoin.cpp:306
#13 0x00005555556becc6 in main (argc=2, argv=0x7fffffffdd68) at qt/bitcoin.cpp:509