- builtin$print$implementation(NULL, NULL, 1, &(output.instance.string_concatenation->left));
- builtin$print$implementation(NULL, NULL, 1, &(output.instance.string_concatenation->right));
+ Stack_push(stack, output.instance.string_concatenation->left);
+ builtin$print$implementation(NULL, NULL, 1, stack);
+ Stack_push(stack, output.instance.string_concatenation->right);
+ builtin$print$implementation(NULL, NULL, 1, stack);