[GHC] #11451: Inconsistent warnings for unused binders

[GHC]

#11451: Inconsistent warnings for unused binders
-------------------------------------+-------------------------------------
        Reporter:  simonpj           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 > What do we think about `length :: [_] -> Int`?

 No, this is not a use in a ''type pattern'' (as are all they cases
 discussed above).  It's an occurrence, pure and simple.  This is
 explicitly covered by `PartialTypeSignatures` and I don't want to change
 all of that.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11451#comment:6>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler