https://bugs.winehq.org/show_bug.cgi?id=43143
--- Comment #2 from zefkerr zefkerrigan@gmail.com --- (In reply to Sebastian Lackner from comment #1)
This also looks like a duplicate of bug 43127.
Please note that this is not really a regression. Archlinux decided to switch to GCC 7 for the Wine Staging 2.9 builds, but the Wine code wasn't really for that yet. The issue can be worked around by disabling optimization, or by applying the patch from the bug report above. I've already suggested to the Archlinux people to provide a backport, however they only want to do that when enough people report it directly to them. ;)
*** This bug has been marked as a duplicate of bug 43127 ***
Thank you for your reply!