OverloadedLists breaks exhaustiveness check
{-# LANGUAGE OverloadedLists #-}
module Bug where
f :: [a] -> ()
f x = case x of
[] -> ()
(_:_) -> ()
GHC reports:
bug.hs:6:7: Warning:
Pattern match(es) are non-exhaustive
In a case alternative: Patterns not matched: []
This is reproducible with 7.8 and 7.10rc1.
Trac metadata
Trac field | Value |
---|---|
Version | 7.8.4 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |