### 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)

if (p_event->is_action_pressed("ui_text_newline_blank", true)) {
		accept_event();
	} else if (p_event->is_action_pressed("ui_text_newline")) {
		popup_editor->hide();
		_apply_multiline_edit();
		accept_event();
	}
}
void Tree::_apply_multiline_edit() {
	if (!popup_edited_item) {
		return;
	}
	if (popup_edited_item_col < 0 || popup_edited_item_col > columns.size()) {
		return;
	}
	TreeItem::Cell &c = popup_edited_item->cells.write[popup_edited_item_col];
	switch (c.mode) {
		case TreeItem::CELL_MODE_STRING: {
			c.text = text_editor->get_text();
		} break;
		default: {
			ERR_FAIL();
		}
	}
	item_edited(popup_edited_item_col, popup_edited_item);
	queue_redraw();
}
void Tree::_line_editor_submit(String p_text) {