Creating a QFont instance, not passing a font family name, before QApplication is created may cause font metrics to be wrong

Creating a QFont instance, not passing a font family, before QApplication is created may cause font metrics to be wrong, i.e.

int main(int argc, char** argv)

{ QFont foo; QApplication qapp(argc, argv); // ... return qapp.exec(); }

This will in some cases cause text to exceed the boundaries of it's widget, becoming clipped.

This does not happen if a family name is passed to the QFont instance, such as

QFont foo("foo");

The actual family name used doesn't seem to matter here, it can even be an non-existant one.