我刚开始学习C++，正在尝试使用二叉树。我找不到答案，如果我应该修复这个警告“局部变量的地址可能会转义函数”？我有类BinaryTree。这个类有两个指针BinaryTree * left = nullptr;和BinaryTree * right = nullptr;。我的类也有方法void BinaryTree::randomTree(bool grow, bool actDepth, short maxDepth, short depth = 0)。
从一开始我就做空树

BinaryTree tmpTree = BinaryTree(
                minDepth,
                mProbability,
                cProbability
        );

然后我想种这棵树

tmpTree.randomTree(
                (bool) Helper::fiftyFifty(),
                (bool) Helper::fiftyFifty(),
                Helper::getRandomNumber(minDepth, maxDepth + 1)
        );

在randomTree方法中有一个警告

... some code ...
        BinaryTree lTmpTree = BinaryTree(
                this->minDepth,
                this->mProbability,
                this->cProbability
        );
        this->left = &lTmpTree;  // <---- I have warning there

        this->left->randomTree(grow, actDepth, maxDepth, depth + (short) add);
... some code ...

请告诉我，我是否应该担心这个警告？