// is zero or one. Both cases are invalid because a zero length
		// tree cannot encode anything and a length-1 tree can only
		// encode EOF and so is superfluous. We reject both.
		if len(codes) < 2 {
			return 0, StructuralError("empty Huffman tree")
		}

		// In this case the recursion doesn't always reduce the length
		// of codes so we need to ensure termination via another
		// mechanism.
		if level == 31 {

			klog.Errorf("failed to convert CRD validation to internal version: %v", err)
			continue
		}
		s, err := schema.NewStructural(internalSchema.OpenAPIV3Schema)
		if err != nil {
			cond.Reason = "StructuralError"
			cond.Message = fmt.Sprintf("failed to check validation schema for version %s: %v", v.Name, err)
			return cond
		}

		pth := field.NewPath("spec", "versions").Index(i).Child("schema", "openAPIV3Schema")