[GHC] #11309: Warn on shady data constructor export

[GHC]

#11309: Warn on shady data constructor export
-------------------------------------+-------------------------------------
        Reporter:  dfeuer            |                Owner:
            Type:  feature request   |               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 goldfire):

 Sounds quite sensible to me. +1.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11309#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler