Re: [PATCH 0/5] MR3919: uiautomationcore: Initial IProxyProviderWinEventHandler WinEvent translation patches.

[Connor McAdams (＠cmcadams)]

On Fri Sep 22 19:45:07 2023 +0000, Esme Povirk wrote:
> When can this happen?

I haven't seen it happen in practice, but in theory:

- `uia_stop_event_thread()` is called and sets the the thread reference count to 0.
- This clears the `event_thread` structure and posts `WM_UIA_EVENT_THREAD_STOP` to the event thread's message queue.
- WinEvents are still in the queue and need to be processed before `WM_UIA_EVENT_THREAD_STOP` is encountered. In this case, these will need to be discarded.