[GHC] #7401: Can't derive instance for Eq when datatype has no constructor, while it is trivial do do so.

[GHC]

#7401: Can't derive instance for Eq when datatype has no constructor, while it is
trivial do do so.
-------------------------------------+-------------------------------------
              Reporter:  jpbernardy  |            Owner:  monoidal
                  Type:  feature     |           Status:  new
  request                            |        Milestone:  7.10.1
              Priority:  normal      |          Version:  7.6.1
             Component:  Compiler    |         Keywords:  deriving,
            Resolution:              |  newcomer
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:  GHC         |       Blocked By:
  rejects valid program              |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by jstolarek):

 * keywords:  deriving => deriving, newcomer


--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7401#comment:20>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler