https://bugs.winehq.org/show_bug.cgi?id=41988
--- Comment #3 from Henri Verbeet hverbeet@gmail.com --- (In reply to fjfrackiewicz from comment #2)
The games do run but I did notice a slight delay between launching the application's menu while this output is being spammed somewhat and I think the only way to bring up the menu is by clicking a few times in its window or otherwise it remains black until I do so.
Not sure if that makes this bug report valid in your opinion or not, however.
Assuming that's not how the application is supposed to work, that's a valid bug. But then that's what the bug report should be about, instead of the message by itself. The message may or may not be related.