generated at
2/15/2025, 7:39:14 PM
例外
たまに起きる失敗
https://qiita.com/Kokudori/items/3a953c00012408f76ab9#例外的状況
https://yosuke-furukawa.hatenablog.com/entry/2021/12/24/145027
例外の初出はLisp?