分段故障W / BST

Question

我一直收到分段错误11，我不确定如何解决它。

void printLevelOrderHelper(Node<T> *root) 
{

        cout<<endl;
        cout<<"Print Level Order Function"<<endl;

        if(!root) return;
        queue <Node<T>*> queue1;
        Node<T> *temp = root;
        while(temp!=nullptr)
        {
                cout<<temp->value<<" ";
                if(temp->left)
                        queue1.push(temp->left);
                if(temp->right)
                        queue1.push(temp->right);

                temp = queue1.front();
                 queue1.pop();

        }


    }

我还包括了我的副本分配操作员，希望你们能告诉我什么是错的。

BST& operator=(BST & other) 
{
    cout << " [d] Copy assignment operator called. " << endl;
    cout << " TODO: Implement copy assignment operator. " << endl;
    if(root != other.root){
            root = cloneTree(other.root);

    }
    return *this;


}