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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #1422

wrong warning for exporting all constructors of a void type

{-# LANGUAGE EmptyDataDecls #-}

module WrongExportWarning (Empty(..)) where

data Empty

produces the incorrect warning:

WrongExportWarning.hs:3:27:
    Warning: The export item `Empty(..)'
             suggests that `Empty' has constructor or class methods
             but it has none; it is a type synonym or abstract type or class

If this was already fixed, I state in my defense that trac's search sucks.

Trac metadata
Trac field Value
Version 6.6
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
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Blocking
CC
Operating system Unknown
Architecture Unknown
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