[GHC] #7613: readSigned consumes too much input

[GHC]

#7613: readSigned consumes too much input
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  Reporter:  liyang                       |          Owner:                  
      Type:  bug                          |         Status:  closed          
  Priority:  normal                       |      Milestone:                  
 Component:  libraries/base               |        Version:  7.6.1           
Resolution:  wontfix                      |       Keywords:                  
        Os:  Unknown/Multiple             |   Architecture:  Unknown/Multiple
   Failure:  Incorrect result at runtime  |     Difficulty:  Unknown         
  Testcase:                               |      Blockedby:                  
  Blocking:                               |        Related:                  
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Comment(by liyang):

 http://comments.gmane.org/gmane.comp.lang.haskell.libraries/14508

 Just found the above thread. Turns out this is a duplicate of #4500. I
 ended up with Attoparsec on UTF-8 ByteStrings which behaves the way I
 expect, and is about 5x faster.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7613#comment:3>
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