https://bugs.winehq.org/show_bug.cgi?id=56583
--- Comment #1 from Stefan Dösinger stefan@codeweavers.com --- This might not be a bug after all. Wiping my ccache directory and rebuilding wine from scratch fixed the problem. The rebuild alone was not enough, so ccache is involved somehow.
I'll keep the bug open for now to see if similar problems are reported by others or if I randomly run into it again. It could be a random bug that just went away by luck.