https://bugs.winehq.org/show_bug.cgi?id=55931
--- Comment #1 from Nikolay Sivov bunglehead@gmail.com --- Created attachment 75498 --> https://bugs.winehq.org/attachment.cgi?id=75498 test patch
This looks like VarMod() bug to me, so the fix belongs to oleaut32. Our current tests hide this problem, see attached diff.