Python 3.10.12
6.6.1
Child.__init__()
## Parent.f()
## Child.f()
## Parent._disconnect(): disconnecting
signalInstanceDisconnect PyObject(PySide6.QtCore.SignalInstance: 0x7ff378f360b0) PyObject(tuple: 1 [method: "Parent.f" instance=0x7ff3919c7e20])
signalInstanceDisconnect signal2signat "sig()"
signalInstanceDisconnect 
   src= PyObject(Sig: 0x7ff378f7ec00) 
   pyMethod= PyObject(builtin_function_or_method: 0x7ff378f844a0) 
   tupleArgs= PyObject(tuple: 3 [Sig: 0x7ff378f7ec00, str: "2sig()", method: "Parent.f" instance=0x7ff3919c7e20]) >call
signalInstanceDisconnect <call
rets= PyObject(True)
## Child._disconnect(): disconnecting
signalInstanceDisconnect PyObject(PySide6.QtCore.SignalInstance: 0x7ff378f360b0) PyObject(tuple: 1 [method: "Child.f" instance=0x7ff378f7ee00])
signalInstanceDisconnect signal2signat "sig()"
signalInstanceDisconnect 
   src= PyObject(Sig: 0x7ff378f7ec00) 
   pyMethod= PyObject(builtin_function_or_method: 0x7ff378f844a0) 
   tupleArgs= PyObject(tuple: 3 [Sig: 0x7ff378f7ec00, str: "2sig()", method: "Child.f" instance=0x7ff378f7ee00]) >call
signalInstanceDisconnect <call
rets= PyObject(False)
Traceback (most recent call last):
  File "/home/kleint/pyside229.py", line 47, in <module>
    c._disconnect()
  File "/home/kleint/pyside229.py", line 20, in _disconnect
    self._s.sig.disconnect(self.f)
RuntimeError: Failed to disconnect signal sig().