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  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #8101
Closed
Open
Created Jul 28, 2013 by exbb2@trac-exbb2

No pattern match non-exhaustiveness warnings when compiling with -fno-code

{-# OPTIONS_GHC -Wall #-}
module A where

data ABC = A | B | C

abc :: ABC -> Int
abc x = case x of
    A -> 1
$ ghc -fno-code -fforce-recomp /tmp/A.hs 
[1 of 1] Compiling A                ( /tmp/A.hs, nothing )
$ ghc -fobject-code -fforce-recomp /tmp/A.hs 
[1 of 1] Compiling A                ( /tmp/A.hs, /tmp/A.o )

/tmp/A.hs:7:9: Warning:
    Pattern match(es) are non-exhaustive
    In a case alternative:
        Patterns not matched:
            B
            C
Trac metadata
Trac field Value
Version 7.6.3
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
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