GHC does not warn for mistakenly empty case
{-# LANGUAGE EmptyCase #-}
{-# OPTIONS_GHC -Wall -fwarn-incomplete-uni-patterns #-}
oops :: Int -> a
oops x = case x of {}Since Int is inhabited, I would expect a warning, but I get none. Since empty case is typically used in situations where programmers want GHC to see an absurdity, this seems most unfortunate.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.10.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
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