[GHC] #14771: TypeError reported too eagerly

[GHC]

#14771: TypeError reported too eagerly
-------------------------------------+-------------------------------------
        Reporter:  hsyl20            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.2.2
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  error/warning at compile-time      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by simonpj):

 * cc: diatchki (added)


Comment:

 Iavor, ideas?  `TypeError` is your baby

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14771#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler