[GHC] #11339: Possible type-checker regression in GHC 8.0

[GHC]

#11339: Possible type-checker regression in GHC 8.0
-------------------------------------+-------------------------------------
        Reporter:  hvr               |                Owner:  simonpj
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Compiler (Type    |              Version:  8.0.1-rc1
  checker)                           |
      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 goldfire):

 So it does. How maddening. I don't know why. I stand by my analysis that
 the original program should be rejected according to the monomorphism
 restriction.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11339#comment:8>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler