I'm neither a FreeBSD folk nor a Rust folk but that looks like a library version mismatch to me - is your libc++ the one that came with your 13.2 system? The symbol it's missing might be new in 13.3. (Not sure whether there's a feasible way to get a 13.3 libc++ without upgrading the whole system, your path of least resistance might be finding a 13.2 rust package.)