Zig Error

tree.zig

// Using Zig 0.14.0

pub const Node = struct {
    allocator: Allocator,
    children: ArrayList(Node),
    parent: ?*Node,
    max_level: usize,
    ...

    pub fn init(allocator: Allocator, value: u8, level: usize) Node {
        const children = ArrayList(Node).init(allocator);
        return Node{
            .allocator = allocator,
            .children = children,
            .parent = null,
            .max_level = 0,
            ...
        };
    }

    pub fn reportLevel(self: *Node, max_level: usize) void {
        print("reportLevel: {d} -> {d}\n", .{ self.level, max_level });
        self.max_level = max_level;

        if (self.parent) |parent| {
            print("Parent exists at: {*}---\n", .{parent});
            parent.reportLevel(max_level);
            print("Parent exists OK\n", .{});
        } else {
            print("No parent, stopping recursion.\n", .{});
        }
    }
};