[GHC] #10600: -fwarn-incomplete-patterns doesn't work with -fno-code

[GHC]

#10600: -fwarn-incomplete-patterns doesn't work with -fno-code
-------------------------------------+-------------------------------------
        Reporter:  akio              |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Incorrect         |               Test Case:
  warning at compile-time            |  driver/T8101b
      Blocked By:                    |                Blocking:
 Related Tickets:  #8101             |  Differential Revisions:
-------------------------------------+-------------------------------------

Comment (by ntc2):

 This causes Emacs Flycheck to not warn for non-exhaustive patterns,
 because it runs GHC with `-fno-code`:
 https://github.com/flycheck/flycheck/issues/722.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10600#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler