https://bugs.winehq.org/show_bug.cgi?id=37347
--- Comment #19 from James Hebden james@hebden.net.au --- Yeah, I totally agree. Just added this because at least I can get my games patched now, and it demonstrates that it's likely an issue with the driver rather than Wine.
It seems to be me that the new Battle.net client is using a GL operation that isn't handled by the Intel driver, but I haven't been able to figure out which one exactly.