[GHC] #2525: maps created by Data.Map.fromAscList fail lookup on some keys present

[GHC]

#2525: maps created by Data.Map.fromAscList fail lookup on some keys present
-----------------------+----------------------------------------------------
    Reporter:  guest   |       Owner:                
        Type:  bug     |      Status:  new           
    Priority:  normal  |   Component:  libraries/base
     Version:  6.8.2   |    Severity:  normal        
    Keywords:          |    Testcase:                
Architecture:  x86     |          Os:  Linux         
-----------------------+----------------------------------------------------
 {{{
 import Data.Map
 member "foo" $ fromAscList [("foo", True), ("bar", False)]
 }}}

 The above expression evaluates to False, when it should clearly be True.
 This works fine when fromList is used instead.

 Tested on 6.8.2, but I don't see anything in the release notes vaguely
 related for 6.8.3.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2525>
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