What will cause NVDA freezing?

[jstar920]

Hi, guys,
When we use NVDA(2024.3.1.33894) to test our windows app which is writen by QT/QML (QT6 version), sometimes, we find the NVDA is not working, and the log complain freezing, I don't know if anyone have this issue, and how to overcome it.
Thanks very much!

The log as following:

ERROR - eventHandler.executeEvent (17:16:57.651) - MainThread (37096):
error executing event: gainFocus on <NVDAObjects.Dynamic_DialogUIAWindowNVDAObject object at 0x0ED96B50> with extra args of {}
Traceback (most recent call last):
  File "eventHandler.pyc", line 345, in executeEvent
  File "eventHandler.pyc", line 116, in __init__
  File "eventHandler.pyc", line 125, in next
  File "NVDAObjects\UIA\__init__.pyc", line 1382, in event_gainFocus
  File "NVDAObjects\__init__.pyc", line 1306, in event_gainFocus
  File "NVDAObjects\__init__.pyc", line 1157, in reportFocus
  File "speech\speech.pyc", line 769, in speakObject
  File "speech\speech.pyc", line 808, in getObjectSpeech
  File "speech\speech.pyc", line 664, in getObjectPropertiesSpeech
  File "baseObject.pyc", line 62, in __get__
  File "baseObject.pyc", line 168, in _getPropertyViaCache
  File "NVDAObjects\behaviors.pyc", line 156, in _get_description
  File "NVDAObjects\behaviors.pyc", line 111, in getDialogText
  File "NVDAObjects\behaviors.pyc", line 111, in getDialogText
  File "NVDAObjects\behaviors.pyc", line 111, in getDialogText
  [Previous line repeated 954 more times]
  File "NVDAObjects\behaviors.pyc", line 86, in getDialogText
  File "baseObject.pyc", line 62, in __get__
  File "baseObject.pyc", line 168, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 1880, in _get_children
  File "NVDAObjects\__init__.pyc", line 100, in __call__
  File "NVDAObjects\UIA\__init__.pyc", line 1056, in findOverlayClasses
  File "baseObject.pyc", line 41, in __get__
  File "NVDAObjects\UIA\__init__.pyc", line 1532, in _get_TextInfo
  File "baseObject.pyc", line 62, in __get__
  File "baseObject.pyc", line 168, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 1503, in _get_UIATextPattern
  File "NVDAObjects\UIA\__init__.pyc", line 1410, in _getUIAPattern
  File "comtypes\__init__.pyc", line 831, in QueryInterface
  File "monkeyPatches\comtypesMonkeyPatches.pyc", line 31, in __call__
ctypes.ArgumentError: argument 1: RecursionError: maximum recursion depth exceeded while calling a Python object
INFO - watchdog.waitForFreezeRecovery (17:16:57.727) - watchdog (144328):
Recovered from freeze after 20.69754259986803 seconds.

[Adriani90]

cc: @michaelDCurran

[seanbudd]

Can you please open a new issue and fill out the bug template as thoroughly as you can?
Don't forget to include a sample application to test with, sample code and full debug level log file.

I'd also encourage reporting this bug to the QT developers.