Re: [PATCH v28 0/1] MR9442: comctl32/treeview: check for child item before SendExpanding

[Thomas Csovcsity (＠thc13)]

I had a deeper look at the app behavior and tried to write a small app reproducing it without success.
Following code flow and app behavior triggers the error, but i am not sure which additional conditions are necessary to reproduce this.
- the app is actively deleting child items from node, after receiving TVN_ITEMEXPANDINGW
- without changing `item->state |= TVIS_EXPANDED;` the next mouse click triggers a toggle, but this code still assumes that the node is expanded, therefore it takes the wrong branch.

If i follow the rules https://gitlab.winehq.org/wine/wine/-/wikis/Clean-Room-Guidelines, i am stuck here to write a small app to reproduce the bug or to write a test for this case.

Any hint is appreciated or please close this MR otherwise with a note.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/9442#note_130401