Empty case causes warning
The following code
{-# LANGUAGE EmptyCase #-}
{-# OPTIONS_GHC -fwarn-incomplete-patterns #-}
data Void
foo :: Void -> ()
foo x = case x of {}
causes this warning
/Users/rae/temp/Scratch.hs:6:9: Warning:
Pattern match(es) are non-exhaustive
In a case alternative: Patterns not matched:
Ok, modules loaded: Main.
Trac metadata
Trac field | Value |
---|---|
Version | 7.7 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |