[GHC] #5001: makeCorePair: arity missing

[GHC]

#5001: makeCorePair: arity missing
-------------------------------------+-------------------------------------
              Reporter:  maeder      |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  high        |        Milestone:  7.4.1
             Component:  Compiler    |          Version:  7.2.1
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:  Incorrect   |       Blocked By:
  warning at compile-time            |  Related Tickets:
             Test Case:              |
  deSugar/should_compile/T5001       |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by nomeata):

 * owner:  simonpj =>
 * status:  closed => new
 * resolution:  fixed =>


Comment:

 Not fully fixed yet. I just observed this when compiling `mono-
 traversable-0.6.2` using GHC-7.8.4-rc1:

 {{{
 [2 of 7] Compiling Data.MonoTraversable ( src/Data/MonoTraversable.hs,
 dist-ghc/build/Da
 ta/MonoTraversable.o )

 src/Data/MonoTraversable.hs:39:1: Warning:
     The import of `$, replicate' from module `Prelude' is redundant
 makeCorePair: arity missing $cofoldMap{v aaQ1} [lid]
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5001#comment:21>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler