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

[GHC]

#10444: Tex.Read.Lex.lex broken
-------------------------------------+-------------------------------------
              Reporter:  strake888   |             Owner:  ekmett
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Core        |           Version:  7.10.1
  Libraries                          |  Operating System:  Unknown/Multiple
              Keywords:              |   Type of failure:  Incorrect result
          Architecture:              |  at runtime
  Unknown/Multiple                   |        Blocked By:
             Test Case:              |   Related Tickets:
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
 {{{
 Prelude> lex "&) = mempty"
 [("&",") = mempty")]
 Prelude> lex "∘) = mempty"
 []
 }}}

 I traced this problem to Text.Read.Lex.lex

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