自己写的一个程序，在Linux运行时会core掉，出现Segmentation fault (core dumped)错误
用idb看core文件后有下面的错误
#0 0x00002b80af58b1aa in _ZN8QX11Info8appDepthEi () in /usr/local/Trolltech/Qt-4.5.2/lib/libQtGui.so.4.5.2
#1 0x00002b80af58b17c in _ZNK8QX11Info5depthEv () in /usr/local/Trolltech/Qt-4.5.2/lib/libQtGui.so.4.5.2
#2 0x00002b80af5e1d24 in _ZN14QX11PixmapData6resizeEii () in /usr/local/Trolltech/Qt-4.5.2/lib/libQtGui.so.4.5.2
#3 0x00002b80af5cef81 in _ZN7QPixmap4initEiii () in /usr/local/Trolltech/Qt-4.5.2/lib/libQtGui.so.4.5.2
#4 0x00002b80af5cba9e in _ZN7QPixmapC9Ev () in /usr/local/Trolltech/Qt-4.5.2/lib/libQtGui.so.4.5.2
#5 0x00002b80af5cba1e in _ZN7QPixmapC1Ev () in /usr/local/Trolltech/Qt-4.5.2/lib/libQtGui.so.4.5.2
#6 0x00002b80adaafcb2 in _ZN6MGraphC9Ev () in /users/ems/sophic/deployment/bin/mmi/lib2dengine.so.1.0.0
#7 0x00002b80adab0046 in _ZN6MGraphC2Ev () in /users/ems/sophic/deployment/bin/mmi/lib2dengine.so.1.0.0
求高手指教这是什么错误
另，主程序main函数中这样写QApplication qa(argc, argv)就没错，但是QApplication qa(argc, argv, false)就会有上面的错误
