[GHC] #12570: Different behaviour in Linux and Mac OS when using some locale environments

[GHC]

#12570: Different behaviour in Linux and Mac OS when using some locale environments
-------------------------------------+-------------------------------------
           Reporter:  asr            |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 While reporting [https://github.com/malcolmwallace/cpphs/issues/6 this]
 cpphs issue, we found the following behaviour:

 {{{
 $ echo -e '\u2200' > test
 $ LC_CTYPE=C ghc -e 'putStr =<< readFile "test"'
 }}}

 In Ubuntu, we get the error

 {{{
 <interactive>: test: hGetContents: invalid argument (invalid byte
 sequence)
 }}}

 but in Mac OS the output is

 {{{
 ∀
 }}}

 GHC version: 8.0.1

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12570>
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