Function pop_to_level

crates/vm/src/builtins/frame.rs:90–100

(mut stack: i64, level: u32)

    }

    fn pop_to_level(mut stack: i64, level: u32) -> i64 {
        if level == 0 {
            return EMPTY_STACK;
        }
        let max_item: i64 = (1 << BITS_PER_BLOCK) - 1;
        let level_max_stack = max_item << ((level - 1) * BITS_PER_BLOCK);
        while stack > level_max_stack {
            stack = pop_value(stack);
        }
        stack
    }

    fn compatible_kind(from: i64, to: i64) -> bool {
        if to == 0 {