Confusing warning message for incomplete patterns
The following code
{-# OPTIONS_GHC -Wall #-}
import Data.Word
f :: Word8 -> Bool
f 0 = True
f 1 = False
f 2 = True
Produces the warning
7:1:
Warning: Pattern match(es) are non-exhaustive
In an equation for `f':
Patterns not matched: #x with #x `notElem` [0#, 1#, 2#]
While accurate, this is not exactly user friendly.
Found in GHC 7.4.1 RC 1
Trac metadata
Trac field | Value |
---|---|
Version | 7.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |