SIGSEGV: CoreApplicationPrivate29sendThroughObjectEventFilters using std::exit(0)

franku

Hi all, I am trying to fix a problem in my QApplication which has to do something with the std::exit() function. The application is built an run on a openSuse Linux 12.1 with Qt 4.8.2 installed.

The application looks similar like this:

@
int main(int argc, char* argv[])
{
atexit(cleanup); //external library code uses std::exit()

QApplication app(argc, argv);
app.setQuitOnLastWindowClosed(false);

MainWindow* win = MainWindowSingleton::instance();
win->show();
libraryCode->doSomething();

//simulate a "library-exit"
bool test = true;
if(test)
std::exit(0); //SIGSEGV

return 0;
}

void cleanup()
{
MainWindowSingleton::destroy();
}
@

I cannot send all the code but the above shows mostly the layout of my program. It is linked against a larger library that uses the std::exit() function if any error occurs. But instead of exiting cleanly my application now raises a segmentation fault in this Qt Method: CoreApplicationPrivate29sendThroughObjectEventFiltersEP7QObject.

There is a singleton for my MainWindow that gets destroyed in the cleanup handler. When the application exits normally (bool test = false) then I have no problem. It only segfaults when running through the exit() handlers. Did many debugging attempts but with no effort.

I'd really have to be prepared for the std::exit() since the library has no alternative. Has someone experience when mixing the std:exit() with Qt code?