#0  0xb7a0fe8c in QBoxLayout::d_func () from /usr/lib/qt4/libQtGui_debug.so.4
#1  0xb7a0e2ee in QBoxLayout::insertWidget () from /usr/lib/qt4/libQtGui_debug.so.4
#2  0xb7a0e4ae in QBoxLayout::addWidget () from /usr/lib/qt4/libQtGui_debug.so.4
#3  0x0804ab1d in addwidget::test (this=0x80714f8) at addwidget.cpp:36
#4  0x0804ae53 in addwidget::qt_metacall (this=0x80714f8, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfd57e70) at moc_addwidget.cpp:64
#5  0xb75ef142 in QMetaObject::activate () from /usr/lib/qt4/libQtCore_debug.so.4
#6  0xb75ef394 in QMetaObject::activate () from /usr/lib/qt4/libQtCore_debug.so.4
#7  0xb7e0ae4e in QAbstractButton::clicked () from /usr/lib/qt4/libQtGui_debug.so.4
#8  0xb7c75cf9 in QAbstractButtonPrivate::click () from /usr/lib/qt4/libQtGui_debug.so.4
#9  0xb7c76f3b in QAbstractButton::mouseReleaseEvent () from /usr/lib/qt4/libQtGui_debug.so.4
#10 0xb7a5298f in QWidget::event () from /usr/lib/qt4/libQtGui_debug.so.4
#11 0xb7c76e05 in QAbstractButton::event () from /usr/lib/qt4/libQtGui_debug.so.4
#12 0xb7ceec16 in QPushButton::event () from /usr/lib/qt4/libQtGui_debug.so.4
#13 0xb7a07261 in QApplicationPrivate::notify_helper () from /usr/lib/qt4/libQtGui_debug.so.4
#14 0xb7a060af in QApplication::notify () from /usr/lib/qt4/libQtGui_debug.so.4
#15 0xb7a080c8 in QCoreApplication::sendSpontaneousEvent () from /usr/lib/qt4/libQtGui_debug.so.4
#16 0xb7a68560 in QETWidget::translateMouseEvent () from /usr/lib/qt4/libQtGui_debug.so.4
#17 0xb7a65bf3 in QApplication::x11ProcessEvent () from /usr/lib/qt4/libQtGui_debug.so.4
#18 0xb7a7ecf1 in QEventDispatcherX11::processEvents () from /usr/lib/qt4/libQtGui_debug.so.4
#19 0xb75d78e2 in QEventLoop::processEvents () from /usr/lib/qt4/libQtCore_debug.so.4
#20 0xb75d79cd in QEventLoop::exec () from /usr/lib/qt4/libQtCore_debug.so.4
#21 0xb75db4d7 in QCoreApplication::exec () from /usr/lib/qt4/libQtCore_debug.so.4
#22 0xb7a057db in QApplication::exec () from /usr/lib/qt4/libQtGui_debug.so.4
#23 0x0804a2b0 in main ()