#0  IA__gdk_display_open (display_name=<optimized out>) at ./gdk/x11/gdkdisplay-x11.c:173
  [Error: gdkdisplay-x11.c was not found in source tree]
#1  0x00007f1931edcfa2 in IA__gdk_display_open_default_libgtk_only () at ./gdk/gdk.c:324
  [Error: gdk.c was not found in source tree]
#2  0x00007f19322a63d5 in IA__gtk_init_check (argv=<optimized out>, argc=<optimized out>) at ./gtk/gtkmain.c:1020
  [Error: gtkmain.c was not found in source tree]
#3  IA__gtk_init (argc=<optimized out>, argv=<optimized out>) at ./gtk/gtkmain.c:1067
  [Error: gtkmain.c was not found in source tree]
#4  0x00007f19400ae4f5 in QGtkStylePrivate::initGtkWidgets (this=0x558c3be587a0) at qgtkstyle_p.cpp:276
  [Error: qgtkstyle_p.cpp was not found in source tree]
#5  0x00007f19400afbcd in QGtk2StylePlugin::create (this=<optimized out>, key=...) at plugin.cpp:51
  [Error: plugin.cpp was not found in source tree]
#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
  [Error: qfactoryloader_p.h was not found in source tree]
#7  QStyleFactory::create (key=...) at styles/qstylefactory.cpp:158
  [Error: qstylefactory.cpp was not found in source tree]
#8  0x0000558c39e18b76 in MainWindow::doChangeStyle() ()
#9  0x0000558c39e20cb4 in MainWindow::MainWindow(QString const&, QUrl const&, QString const&, QWidget*) ()
#10 0x0000558c39a709c1 in main ()