[GHC] #7669: Empty case causes warning

[GHC]

#7669: Empty case causes warning
------------------------------------------------+---------------------------
  Reporter:  goldfire                           |          Owner:                  
      Type:  bug                                |         Status:  closed          
  Priority:  normal                             |      Milestone:                  
 Component:  Compiler                           |        Version:  7.7             
Resolution:  fixed                              |       Keywords:  EmptyCase       
        Os:  Unknown/Multiple                   |   Architecture:  Unknown/Multiple
   Failure:  Incorrect warning at compile-time  |     Difficulty:  Unknown         
  Testcase:  deSugar/should_compile/T7669       |      Blockedby:                  
  Blocking:                                     |        Related:                  
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Comment(by monoidal):

 However, previously empty case always gave a warning; now it never does.

 {{{
 f :: Bool -> a
 f x = case x of { }
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7669#comment:3>
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