"例外は共有の秘密である" - linglang’s diaryExceptions are shared secrets | Existential Type の内容が興味深かったので試訳してみました。 It's quite obvious to me that the treatment of exceptions in Haskell is wrong. Setting aside the example I gave before of an outright unsoundness, exceptions in Haskell are nevertheless done improperly, even if they happen to be sound. One reason is that the current formulation is not stable under seemingly mild extensions to H
