this post was submitted on 17 Oct 2024
1368 points (98.9% liked)

RetroGaming

19795 readers
439 users here now

Vintage gaming community.

Rules:

  1. Be kind.
  2. No spam or soliciting for money.
  3. No racism or other bigotry allowed.
  4. Obviously nothing illegal.

If you see these please report them.

founded 2 years ago
MODERATORS
 
you are viewing a single comment's thread
view the rest of the comments
[–] calcopiritus@lemmy.world 2 points 2 months ago

I recently came across a rust book on how pointers aren't just ints, because of UB.

fn main() {
    a = &1
    b = &2
    a++
    if a == b {
        *a = 3
        print(b)
    }
}

This may either: not print anything, print 3 or print 2.

Depending on the compiler, since b isn't changed at all, it might optimize the print for print(2) instead of print(b). Even though everyone can agree that it should either not print anything or 3, but never 2.