Text height of QTextEdit is 1 pixel?

[clarify]

I've found an odd problem with Qt5.
When I do this in my QTextEdit subclass:

document()->size();

... I get back a size that has the correct width but the height is 1.
Is that a bug or a feature?

[SGaist]

Hi,

With only that line it's impossible to say.

Please provide a complete minimal compilable example that shows this behavior.