Are there any programming languages which consider adding new functions to the std library a breaking change?? I know it technically is, but it seems to me that

Are there any programming languages which consider adding new functions to the std library a breaking change?? I know it technically is, but it seems to me that this is ignored everywhere, not just in Rust.(because the chance of breakage is small, and you wouldn't be able to make much in the way of meaningful changes otherwise).