Version:           3.0.0a7 (using KDE KDE 3.1.93)
Installed from:    Compiled From Sources
Compiler:          gcc (GCC) 3.2.3 
OS:          Linux

Crash during use (in an imported custom project).
I cannot explain exactly how it happens.
I hope this backtrace can help you :


[New Thread 16384 (LWP 5278)]
[New Thread 32769 (LWP 5298)]
[New Thread 16386 (LWP 5299)]
0x416bc178 in waitpid () from /lib/libpthread.so.0
#0  0x416bc178 in waitpid () from /lib/libpthread.so.0
#1  0x40d8bf60 in KCrash::defaultCrashHandler(int) ()
   from /usr/kde/3.2/lib/libkdecore.so.4
#2  0x416bafea in __pthread_sighandler () from /lib/libpthread.so.0
#3  <signal handler called>
#4  0x4115311b in QObject::connect(QObject const*, char const*, QObject const*, char const*) () from /usr/qt/3.2/lib/libqt-mt.so.3
#5  0x4116e291 in QSignal::connect(QObject const*, char const*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#6  0x4124bf44 in QMenuData::connectItem(int, QObject const*, char const*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#7  0x4124a8ce in QMenuData::insertItem(QString const&, QObject const*, char const*, QKeySequence const&, int, int) () from /usr/qt/3.2/lib/libqt-mt.so.3
#8  0x0806b7c5 in MainWindow::fillWindowMenu() ()
#9  0x0806d835 in MainWindow::qt_invoke(int, QUObject*) ()
#10 0x41154470 in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#11 0x411542a4 in QObject::activate_signal(int) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#12 0x414801ae in QPopupMenu::aboutToShow() ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#13 0x4124e5ae in QPopupMenu::popup(QPoint const&, int) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#14 0x41246f80 in QMenuBar::openActPopup() ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#15 0x41249166 in QMenuBar::setActiveItem(int, bool, bool) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#16 0x412489a8 in QMenuBar::mouseMoveEvent(QMouseEvent*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#17 0x41188bfb in QWidget::event(QEvent*) () from /usr/qt/3.2/lib/libqt-mt.so.3
#18 0x41246c5e in QMenuBar::tryMouseEvent(QPopupMenu*, QMouseEvent*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#19 0x4124ed03 in QPopupMenu::tryMenuBar(QMouseEvent*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#20 0x412532c7 in QPopupMenu::mouseMoveEvent(QMouseEvent*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#21 0x41188bfb in QWidget::event(QEvent*) () from /usr/qt/3.2/lib/libqt-mt.so.3
#22 0x410f9875 in QApplication::internalNotify(QObject*, QEvent*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#23 0x410f9012 in QApplication::notify(QObject*, QEvent*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#24 0x40ce507e in KApplication::notify(QObject*, QEvent*) ()
   from /usr/kde/3.2/lib/libkdecore.so.4
#25 0x4109381d in QETWidget::translateMouseEvent(_XEvent const*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#26 0x410913c2 in QApplication::x11ProcessEvent(_XEvent*) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#27 0x410a7777 in QEventLoop::processEvents(unsigned) ()
   from /usr/qt/3.2/lib/libqt-mt.so.3
#28 0x4110cac6 in QEventLoop::enterLoop() () from /usr/qt/3.2/lib/libqt-mt.so.3
#29 0x4110c968 in QEventLoop::exec() () from /usr/qt/3.2/lib/libqt-mt.so.3
#30 0x410f9ac1 in QApplication::exec() () from /usr/qt/3.2/lib/libqt-mt.so.3
#31 0x08067944 in main ()
#32 0x4182f90c in __libc_start_main () from /lib/libc.so.6