https://bugs.winehq.org/show_bug.cgi?id=35477
--- Comment #20 from Henri Verbeet hverbeet@gmail.com --- (In reply to Fabian Maurer from comment #19)
I'd argue it's working as intended.
How so? It's a missing extension that other drivers support.
Sure, but there are plenty of extensions that are supported on some drivers/hardware but not others. The authors of the application made a choice to only run on drivers that support GL_EXT_geometry_shader4; Mesa doesn't (for reasons that I happen to agree with), so the application doesn't run there.
You could consider that unfortunate on either the side of the application or on the side of the driver, but at best that would result in a feature request, not a bug report. In either case, Wine isn't a party in that particular issue, and the originally reported issue seems resolved.