#0  IA__gdk_display_open (display_name=<optimized out>) at ./gdk/x11/gdkdisplay-x11.c:173
        xdisplay = 0x558c3be5e2d0
        display = <optimized out>
        display_x11 = <optimized out>
        attr = {title = 0x62696c2f73656c75 <error: Cannot access memory at address 0x62696c2f73656c75>, event_mask = 762016865, x = 1684632162, y = 0, width = 0, height = 0, wclass = GDK_INPUT_OUTPUT, visual = 0x0, colormap = 0x558c3be5b2c0, window_type = 1000, cursor = 0x7ffca6f53c00, wmclass_name = 0x7ffca6f53c30 " \311\344;\214U", wmclass_class = 0x7f1967c0518c <__GI___libc_free+76> "H\203\304([]A\\A]\303f\017\037\204", override_redirect = 1004909248, type_hint = 21900}
        argc = <optimized out>
        argv = {0x1 <error: Cannot access memory at address 0x1>}
        sm_client_id = <optimized out>
        class_hint = <optimized out>
        pid = 0
        i = <optimized out>
        ignore = 0
        maj = 0
        min = 0
#1  0x00007f1931edcfa2 in IA__gdk_display_open_default_libgtk_only () at ./gdk/gdk.c:324
        display = 0x0
        display = 0x0
#2  0x00007f19322a63d5 in IA__gtk_init_check (argv=<optimized out>, argc=<optimized out>) at ./gtk/gtkmain.c:1020
        argc = <optimized out>
        argv = <optimized out>
#3  IA__gtk_init (argc=<optimized out>, argv=<optimized out>) at ./gtk/gtkmain.c:1067
No locals.
#4  0x00007f19400ae4f5 in QGtkStylePrivate::initGtkWidgets (this=0x558c3be587a0) at qgtkstyle_p.cpp:276
        ruid = <optimized out>
        rgid = 1000
        euid = <optimized out>
        egid = <optimized out>
        qt_x_errhandler = 0x7f1955907740 <nullErrorHandler(Display*, XErrorEvent*)>
        gtkWindow = <optimized out>
        widgetPath = {m_size = 1004454832, m_data = 0x7f196889763b <QObject::QObject(QObjectPrivate&, QObject*)+155> "H\213\005.YA"}
        this = 0x558c3be587a0
        ruid = <optimized out>
        rgid = 1000
        euid = <optimized out>
        egid = <optimized out>
#5  0x00007f19400afbcd in QGtk2StylePlugin::create (this=<optimized out>, key=...) at plugin.cpp:51
No locals.
#6  0x00007f196992103b in qLoadPlugin<QStyle, QStylePlugin> (key=..., loader=<optimized out>) at ../../include/QtCore/5.7.1/QtCore/private/../../../../../src/corelib/plugin/qfactoryloader_p.h:103
        result = <optimized out>
        factoryObject = <optimized out>
        index = <optimized out>
#7  QStyleFactory::create (key=...) at styles/qstylefactory.cpp:158
        ret = 0x0
        style = {static null = {<No data fields>}, d = 0x558c3be4c920}
#8  0x0000558c39e18b76 in MainWindow::doChangeStyle() ()
No symbol table info available.
#9  0x0000558c39e20cb4 in MainWindow::MainWindow(QString const&, QUrl const&, QString const&, QWidget*) ()
No symbol table info available.
#10 0x0000558c39a709c1 in main ()
No symbol table info available.