### 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)

} else {
				return nullptr;
			}
		}
	} else {
		current = prev_item;
		while ((!current->collapsed || p_include_invisible) && current->first_child) {
			
			current = current->first_child;
			while (current->next) {
				current = current->next;
			}
		}
	}
	return current;
}
TreeItem *TreeItem::get_prev_visible(bool p_wrap) {
	TreeItem *loop = this;
	TreeItem *prev_item = this->_get_prev_in_tree(p_wrap);
	while (prev_item && !prev_item->is_visible()) {
		prev_item = prev_item->_get_prev_in_tree(p_wrap);
		if (prev_item == loop) {
			
			prev_item = nullptr;
			break;
		}
	}
	return prev_item;
}
TreeItem *TreeItem::_get_next_in_tree(bool p_wrap, bool p_include_invisible) {