QByteArray bool() result is wrong for empty string

bool(QByteArray(b"")) is True, but should be false (like bool(QByteArray())):

>>> from PySide6.QtCore import QByteArray
>>> ba1 = QByteArray(b"test")
>>> ba2 = QByteArray(b"")
>>> ba3 = QByteArray()
>>> ba1.__bool__
<method-wrapper '__bool__' of PySide6.QtCore.QByteArray object at 0x7f4544f35800>
>>> len(ba1)
4
>>> len(ba2)
0
>>> len(ba3)
0
>>> bool(ba1)
True
>>> bool(ba2)
True   # !!!
>>> bool(ba3)
False

Note especially that:

>>> ba2 == ba3
True

so we have two objects which are equal, yet produce different results with bool().

I believe the fix would be to just not define a __bool__ on it. According to the Python data model: When __bool__ is not defined, __len__() is called, if it is defined, and the object is considered true if its result is nonzero.

I tried to find where this is actually implemented in
sources/pyside6/PySide6/QtCore/typesystem_core_common.xml or sources/pyside6/PySide6/glue/qtcore.cpp but failed to find it.