[GHC] #11762: GHC 8 superclass chain constraint regression

[GHC]

#11762: GHC 8 superclass chain constraint regression
-------------------------------------+-------------------------------------
        Reporter:  _deepfire         |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Compiler (Type    |              Version:  8.0.1-rc2
  checker)                           |
      Resolution:  duplicate         |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11427            |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by simonpj):

 * status:  new => closed
 * resolution:   => duplicate


Comment:

 OK so currently this is by design, and so I'll mark it as invalid

 By all means suggest something better, but we can't do much for 8.0.

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11762#comment:6>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler