[GHC] #2136: Not warned about unused recursive bindings

[GHC]

#2136: Not warned about unused recursive bindings
-------------------------+--------------------------------------------------
    Reporter:  igloo     |       Owner:         
        Type:  bug       |      Status:  new    
    Priority:  normal    |   Milestone:  6.8.3  
   Component:  Compiler  |     Version:  6.8.2  
    Severity:  normal    |    Keywords:         
  Difficulty:  Unknown   |    Testcase:  rn063  
Architecture:  Unknown   |          Os:  Unknown
-------------------------+--------------------------------------------------
 If we have this module:
 {{{
 module Q where

 v :: a
 v = let x = x in undefined

 w :: a
 w = let y = 'a' in undefined
 }}}
 then we get warned that `y` is unused, but not that `x` is:
 {{{
 q.hs:8:8: Warning: Defined but not used: `y'
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2136>
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