Esme Povirk (@madewokherd) commented about dlls/ntdll/ntdll.spec:
# Debugging @ stdcall -norelay __wine_dbg_write(ptr long) @ cdecl -norelay __wine_dbg_get_channel_flags(ptr) -@ cdecl -norelay __wine_dbg_header(long long str) +@ cdecl -norelay __wine_dbg_header(long long str long str)
I think Wine Mono's wpfgfx_cor3.dll uses this function and would be broken by the change.