MainWindow deleteLater() segmentation fault

[abarmotov]

If this is RTFM, point me )
Create simple GUI App in Creator, append button and write in slot: deleteLater()
Run it, press this button - segmentation fault take place
In application output "double free or curruption" error shown
Ubuntu 16.04 64Bit, Qt 5.12.0 from offline installer

[Christian Ehrlicher]

Please show use you code.

[abarmotov]

This post is deleted!

[abarmotov]

void MainWindow::on_pushButton_clicked()
{
    deleteLater();
}

[jsulm]

@abarmotov Why do you do this?

[abarmotov]

@jsulm Why i cant ?
Is it unsafe to call QObject::deleteLater() here ?

[jsulm]

@abarmotov It is unusual that an object destroys itself. Can you explain why you're doing this?
The problem is (I guess your code looks like this):

void main()
{
    ...
    MainWindow window;
    ...
    app.exec();
    // Here window will be destroyed, but you call deleteLater() in in the slot -> double delete
}

[abarmotov]

@jsulm yes, forgot about main.cpp )

[Christian Ehrlicher]

So how does your main.cpp looks like? The same as jsulm posted? Then you must not call deleteLater() since you created MainWindow on the stack.

[abarmotov]

Yes, this is default project main.cpp, i failed to saw where double free occured. But now ok.