On Saturday, 18 September 2021 at 09:39:24 UTC, eugene wrote:
The definition of this struct was taken from /usr/include/dmd/druntime/import/core/sys/linux/epoll.d
...
If the reason for crash was in EpollEvent alignment, programs would segfaults always very soon after start, just right after the very first return from epoll_wait().
The struct's fine as far as libc and the kernel are concerned. epoll_wait is not even using those 64 bits or interpreting them as containing any kind of data, it's just moving them around for the caller to use. It's also not a hardware error to interpret those bits where they are as a pointer. They are however not 64-bit aligned so D's GC is collecting objects that only they point to.
