Program Crashing because of Singal [need help!]

[nix]

That's normal after deleting the QSplashScreen base you should not do any stuff with signal or metadata.

Why don't do that :

//slots
void QSS::fechar()
{
hide();
emit fechou();
close();
}

//slots
void QSS::fechar()
{
hide();
emit fechou();
close();
}

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and add a Qt::WA_DeleteOnClose flag on your splashscreen (or use deleteLater() ).

And please, use CODE TAG!!