The C23 edition of Modern C

How does "Modern" C compare safety-wise to Rust or Zig?

You'd be surprised: Zig has one UB (Undefined Behaviour) that C doesn't have!

In release fast mode, unsigned overflow/underflow is undefined in Zig whereas in C it wraps.

:-)

Of course C has many UBs that Zig doesn't have, so C is far less safe than Zig, especially since you can use ReleaseSafe in Zig..

Does C automatically wrap? I thought you need to pass `-fwrapv` to the compiler to ensure that.