3 ms·

I am not entirely sure, but it seems they chose to return a null pointer: https://github.com/ziglang/zig/commit/32e0dfd4f0dab351a024e7680280343db5d7c43e https:

• anonymoushn 3y ago
  This is a commit that changes the now-defunct Zig compiler written in C++ to be careful when it calls malloc. So it has nothing to do with the semantics of the Zig language or the compatibility of zero-sized Zig slices with Rust, C, or C++ APIs.