Re: [GHC] #11632: Data.Char repeated readLitChar barfs on output from show "ó1" (was: read (show "ó1") fails)

[GHC]

#11632: Data.Char repeated readLitChar barfs on output from show "ó1"
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        Reporter:  inversemot        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  libraries/base    |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by rwbarton):

 * priority:  high => normal


@@ -1,5 +1,0 @@
- {{{
- Prelude> let s = "ó1" in read (show s)
- *** Exception: Prelude.read: no parse
- }}}
-

New description:

 "ó1" is "\243\&1" and when shown that's `"\"\\243\\&1\""`

 {{{#!hs
 readLitChar "\"\\243\\&1\"" = [('"', "\\243\\&1\"")]
 readLitChar "\\243\\&1\"" = [('\243', "\\&1\"")] --should have consumed
 "\\&"
 readLitChar "\\&1\"" = []
 }}}

--

Comment:

 Wait no, I'm wrong. `read (show "ó1")` works fine, I just forgot to ask
 for a string.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11632#comment:3>
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