[GHC] #10444: Tex.Read.Lex.lex broken

[GHC]

#10444: Tex.Read.Lex.lex broken
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        Reporter:  strake888         |                   Owner:  ekmett
            Type:  bug               |                  Status:  patch
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Core Libraries    |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by rwbarton):

 Replying to [comment:6 mfdyck.google]:
 > isPunctuation and isSymbol are defined in terms of GeneralCategory,
 which derives Read, and GHC.Read imports Text.Read.Lex.

 Ah, gotcha.

 > We could move GeneralCategory and generalCategory to GHC.Unicode and
 standalone derive Read instance in GHC.Read or Data.Char; acceptable?

 Probably more acceptable than the boot file; I'll defer to hvr on this
 subject though.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10444#comment:7>
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