Yes, I was using it to describe the standard library. C and C++ are both described as having a runtime, and Rust has one in the same sense. In any case I would

Yes, I was using it to describe the standard library. C and C++ are both described as having a runtime, and Rust has one in the same sense. In any case I would consider the code needed for handling stack unwinding to be worthy of the name runtime (small though it may be). I understand it doesn't have a runtime in the way a JIT'ed or GC'ed language has a runtime, but it's a runtime nonetheless.