[GHC] #11170: (read ".9") :: Double unable to parse

[GHC]

#11170: (read ".9") :: Double unable to parse
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        Reporter:  varosi            |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  7.10.2
      Resolution:                    |             Keywords:  Read
Operating System:  Windows           |         Architecture:  x86_64
 Type of failure:  Incorrect result  |  (amd64)
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by ekmett):

 In the past we've avoided in the past making GHC-specific changes in what
 `read` will accept to avoid hard to track down differences across
 compilers.

 We've rejected at least one similar generalization request (binary
 literals) on those grounds. #10092

 That said, there is already a chink in that armor as I believe we've let
 in a patch in that generalized `lex` to allow a bit more unicode. #10444

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11170#comment:5>
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