I’m not sure I'd draw a distinction. People used to say you should initialise your variables in C89 to NULL, so you'd get a crash if you forget to properly set

I’m not sure I'd draw a distinction. People used to say you should initialise your variables in C89 to NULL, so you'd get a crash if you forget to properly set the variable. But enough security bugs have been caused by null pointer dereferences. In the Rust case, IIRC, Rust annotates functions with the LLVM attribute no_unwind. I'd expect bad things, thanks to optimisation passes, if an unwind were to start. Doubly so if mixing GCC with MSVC ABI.