[GHC] #15798: Flag to warn when deriving strategy is not explicitly specified

[GHC]

#15798: Flag to warn when deriving strategy is not explicitly specified
-------------------------------------+-------------------------------------
        Reporter:  andrewthad        |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.1
      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 andrewthad):

 That does sound better. I'll go with that. And I'm glad to know that
 someone else has thought about such a flag before.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15798#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler