Crash in closeEvent()

deisik

If I choose to ignore event in closeEvent() in QMainWindow, application crashes within a few seconds after clicking [x]

main.cpp:

#include "main_window.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

main_window.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QCloseEvent>

class MainWindow : public QMainWindow {
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
protected slots:
    void closeEvent(QCloseEvent*);
};

#endif // MAINWINDOW_H

main_window.cpp

#include "main_window.h"

void MainWindow::closeEvent(QCloseEvent *event) {
    event->ignore();
}

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) {
}

Call stack:

1 poll 0x7ffff638699f
2 ?? 0x7ffff5fd28ce
3 g_main_context_iteration 0x7ffff5fd29ef
4 QEventDispatcherGlib::processEvents qeventdispatcher_glib.cpp 393 0x7ffff6c59b3a
5 QEventLoop::exec qflags.h 108 0x7ffff69bdd5b
6 QCoreApplication::exec qflags.h 74 0x7ffff69ba13e
7 main main.cpp 10 0x55555555724f

Feels like the crash doesn't have anything to do with Qt (broken glibc?)

deisik

I updated glibc along with a few x11 libraries and after rebooting the problem is gone, although not sure if simple rebooting wouldn't do the trick (was up for a couple of months)

deisik

It turned it out to be a system-wide issue after an uptime of couple months or so. Any program (for example, Firefox) would be forcefully closed after a few seconds if it showed a warning dialog box on exit