QDebug nospace() is broken

The result of:
qDebug().nospace() << "hello" << QSize(10, 10) << "world";

is:
helloQSize(10, 10) world

not:
helloQSize(10, 10)world

(i.e. a space is added before "world"). This issue seems to be shared with a lot of the Qt classes and not just QSize.