Breakpoint 2, 0xb1d297d0 in gtk_init () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
(gdb) bt
#0  0xb1d297d0 in gtk_init () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
#1  0xb2299a33 in ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platformthemes/libappmenu-qt5.so
#2  0xb229a1d9 in ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platformthemes/libappmenu-qt5.so
#3  0xb6bdf784 in ?? () from /usr/lib/i386-linux-gnu/sse2/libQt5Gui.so.5
#4  0xb6be93f6 in QGuiApplicationPrivate::createPlatformIntegration() () from /usr/lib/i386-linux-gnu/sse2/libQt5Gui.so.5
#5  0xb6be9f24 in QGuiApplicationPrivate::createEventDispatcher() () from /usr/lib/i386-linux-gnu/sse2/libQt5Gui.so.5
#6  0xb71f0648 in QApplicationPrivate::createEventDispatcher() () from /usr/lib/i386-linux-gnu/libQt5Widgets.so.5
#7  0xb68b36a6 in QCoreApplication::init() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#8  0xb68b3725 in QCoreApplication::QCoreApplication(QCoreApplicationPrivate&) () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#9  0xb6bec07e in QGuiApplication::QGuiApplication(QGuiApplicationPrivate&) () from /usr/lib/i386-linux-gnu/sse2/libQt5Gui.so.5
#10 0xb719665d in QApplication::QApplication(int&, char**, int) () from /usr/lib/i386-linux-gnu/libQt5Widgets.so.5
#11 0x0804b17b in ?? ()
#12 0xb6331a83 in __libc_start_main (main=0x804ad60, argc=2, argv=0xbffff634, init=0x804eb90, fini=0x804ec00, rtld_fini=0xb7fed130 <_dl_fini>, stack_end=0xbffff62c) at libc-start.c:287
#13 0x0804d610 in ?? ()