Showing QListWidget freezes application

swirl

Title says it all. It happens with code as simple as this:

QListWidget* list = new QListWidget();
new QListWidgetItem(tr("Test"), list);
list->show();

I've tried:

Not adding an item at all
Making its parent a regular window
Adding an item in different ways
Setting sorting modes
Setting it as visible, and different ways to show (i.e. minimized, fullscreen, etc)

None of which helped. All of them just pop up a blank window with a title, each completely unresponsive. When I click on the X in the top right, I get a Plasma error saying the app is unresponsive, and I have to forcefully terminate it. However, oddly, the application doesn't stop when it's shown, it keeps going which I don't think is supposed to happen. What's going on?

swirl

Attached it to a QDialog and it worked. Woops.