### Godot version

3.5.1mono

### System information

windows10

### Issue description

Error message
 scene/main/node.cpp:1362 - Index p_index = 0 is out of bounds (data.children.size() = 0).
 scene/main/node.cpp:397 - Parameter "p_child" is null.
 scene/gui/tab_container.cpp:593 - Index p_current = 0 is out of bounds (get_tab_count() = 0).
See "Steps to reproduce for details"

### Steps to reproduce

Set an external text editor
Create a script
Drop the script to the built-in text editor like this image:
![image](https://user-images.githubusercontent.com/119792950/209504041-039f2620-5e42-4c0f-8c41-cd24486fb3d2.png)
And got error message:
 scene/main/node.cpp:1362 - Index p_index = 0 is out of bounds (data.children.size() = 0).
 scene/main/node.cpp:397 - Parameter "p_child" is null.
 scene/gui/tab_container.cpp:593 - Index p_current = 0 is out of bounds (get_tab_count() = 0).

### Minimal reproduction project

An empty project
for (int i = 0; i < tab_container->get_tab_count(); i++) {
		ScriptEditorBase *se = Object::cast_to<ScriptEditorBase>(tab_container->get_tab_control(i));
		if (!se) {
			continue;
		}
		if (se->get_meta("_edit_res_path") == p_removed_file) {
			
			_close_tab(i, false, false);
		}
	}
	
	if (script_editor_cache->has_section(p_removed_file)) {
		Array breakpoints = _get_cached_breakpoints_for_script(p_removed_file);
		for (int i = 0; i < breakpoints.size(); i++) {
			EditorDebuggerNode::get_singleton()->set_breakpoint(p_removed_file, (int)breakpoints[i] + 1, false);
		}
		script_editor_cache->erase_section(p_removed_file);
	}
}
void ScriptEditor::_update_find_replace_bar() {
	ScriptEditorBase *se = _get_current_editor();
	if (se) {
		se->set_find_replace_bar(find_replace_bar);
	} else {
		find_replace_bar->set_text_edit(nullptr);
		find_replace_bar->hide();
	}
}
void ScriptEditor::_autosave_scripts() {