### 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)

emit_signal(SNAME("multi_selected"), p_item, col, false);
					} else {
						p_item->select(col);
						emit_signal(SNAME("multi_selected"), p_item, col, true);
						emit_signal(SNAME("item_mouse_selected"), get_local_mouse_position(), p_button);
					}
				} else {
					if (select_mode == SELECT_MULTI && p_mod->is_shift_pressed() && selected_item && selected_item != p_item) {
						bool inrange = false;
						select_single_item(p_item, root, col, selected_item, &inrange);
						emit_signal(SNAME("item_mouse_selected"), get_local_mouse_position(), p_button);
					} else {
						int icount = _count_selected_items(root);
						if (select_mode == SELECT_MULTI && icount > 1 && p_button != MouseButton::RIGHT) {
							single_select_defer = p_item;
							single_select_defer_column = col;
						} else {
							if (p_button != MouseButton::RIGHT || !c.selected) {
								select_single_item(p_item, root, col);
							}
							emit_signal(SNAME("item_mouse_selected"), get_local_mouse_position(), p_button);
						}
					}
					queue_redraw();
				}
			}
		}
		if (!c.editable) {
			return -1; 
		}