### Godot version

4.2 Stable

### System information

Linux

### Issue description

Calling TreeItem set_text() on a TreeItem that was removed via remove_child() causes debugging to end and the application to close without any error message.

### Steps to reproduce

Run the included example to get the debugger to crash. Comment out "treeItem.remove_child(subTreeItem)" for normal behaviour. 

### Minimal reproduction project

[treeItemCrash.zip](https://github.com/godotengine/godot/files/13534005/treeItemCrash.zip)

TreeItem *loop = this;
	TreeItem *next_item = this->_get_next_in_tree(p_wrap);
	while (next_item && !next_item->is_visible()) {
		next_item = next_item->_get_next_in_tree(p_wrap);
		if (next_item == loop) {
			
			next_item = nullptr;
			break;
		}
	}
	return next_item;
}
TreeItem *TreeItem::get_prev_in_tree(bool p_wrap) {