https://bugs.winehq.org/show_bug.cgi?id=36120
--- Comment #1 from Henri Verbeet hverbeet@gmail.com --- Commit 301a17d55649b0159f3ecc1e394a3dd6608ecc74 is likely to have helped here. (And not just because vertexdeclaration.c is gone, I think it should avoid the actual leak as well.)