Line 28: Char 35: runtime error: member access within misaligned address 0xbebebebebebebebe for type 'TreeNode', which requires 8 byte alignment (solution.cpp)
0xbebebebebebebebe: note: pointer points here
<memory cannot be printed>
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior prog_joined.cpp:37:35

    vector<vector<int>> zigzagLevelOrder(TreeNode* root) {
        queue<TreeNode* > q;
        q.push(root);
        vector<vector<int>> ans;
        while(!q.empty()){
            int x=q.size();
            int child_num=0;
            vector<int> v;
            while(x--){
                TreeNode* curr=q.front();
                q.pop();
                v.push_back(curr->val);
                if(curr->left) q.push(curr->left);
                if(curr->right) q.push(curr->right);
                x-=1;
            }
            reverse(v.begin(),v.end());
            ans.push_back(v);
            v.clear();
        }
        return ans;
    }