-ddump-minimal-imports creates incorrect imports for associated types
If you have a module URL.hs:
{-# LANGUAGE TypeFamilies #-}
module URL (ToURL(toURL, nullURL, errorURL), URLT) where
class ToURL a where
type URLT a
toURL :: a -> URLT a
nullURL :: a
errorURL :: a -> URLT a
And a module that uses it Tmp.hs:
{-# LANGUAGE FlexibleContexts #-}
module Tmp ( clean ) where
import Data.Char (isAlphaNum)
import Data.List (dropWhile)
import URL
clean :: (ToURL url, Show (URLT url)) => url -> String
clean = filter isAlphaNum . show . toURL
when you run ghc -ddump-minimal-imports Tmp.hs
the resulting Tmp.imports
will contain the line
import URL ( ToURL(URLT, toURL) )
but it should contain
import URL ( ToURL(toURL), URLT )
This affects both associated type and associated type synonym declarations.
Trac metadata
Trac field | Value |
---|---|
Version | 7.6.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |