https://bugs.winehq.org/show_bug.cgi?id=44250
--- Comment #7 from A andrew@alshain.org.uk --- Wine 3.6 and mesa 18.0.1
I no longer have the save from outside the Vulkar base, but I tried it with a later save outside the Rakatan base which crashed with the same error and it's now working. So it does look like it's now been fixed.