CGAL users discussion list

[Tariq Dinar <>]

Hi,
I am trying to split leaf nodes that are stored  by means of  pointers in a list . When iterating over the list, while splitting each node, I get a violation of is_leaf() precondition, which should not occur in my list. It seems as if the tree is changing within the loop making some of the pointers not valid. Please have a look at the code below and advice if you may. 

```
 while (iter != tree_nodes.end() ){
    Quadtree::Node node = *iter;
    if (node.is_leaf()){
      list_nodes.push_back(&node);
    }
    iter++;
  }
  std::vector<Quadtree::Node*>::iterator index = list_nodes.begin();
  while (index != list_nodes.end() ){
    Quadtree::Node* p = *index;
    Quadtree::Node node = *p;
    CGAL::Orthtrees::Node_access::split(node);
    index++;
  }
```

Tariq

Thank you.