https://bugs.winehq.org/show_bug.cgi?id=27680
--- Comment #32 from Justas L bucaneer@gmail.com --- Another correction: I was mistakenly assuming that the WINAPI define always included force_align_arg_pointer attribute, whereas it was only true for the 32bit target. Adding force_align_arg_pointer on 64bit as well fixes the bug (the 4 testcases mentioned before) without the use of -mincoming-stack-boundary=3.