[GHC] #5599: msys has bad Unicode support

[GHC]

#5599: msys has bad Unicode support
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        Reporter:  simonpj                       |            Owner:
            Type:  bug                           |           Status:
        Priority:  normal                        |  closed
       Component:  Compiler                      |        Milestone:  7.4.1
      Resolution:  fixed                         |          Version:  7.2.1
Operating System:  Unknown/Multiple              |         Keywords:
 Type of failure:  None/Unknown                  |     Architecture:
       Test Case:  llibraries/tests/IO/T3307,    |  Unknown/Multiple
  environment001                                 |       Difficulty:
        Blocking:                                |  Unknown
                                                 |       Blocked By:
                                                 |  Related Tickets:
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Comment (by awson):

 Replying to [comment:6 schyler]:
 > #8842 would be a good thing to check before making it default.

 You shall *never* install msys2 runtime and development tools. You should
 only install msys2-base distribution and mingw(32|64)-* runtime and
 development tools.

 You also shall start msys2 shell with mingw(32|64)_shell.bat script
 included into distribution.

 This way you receive (native 32 or 64 bit windows) mingw-w64 runtime based
 development environment with no remnants of Msys2 runtime.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5599#comment:7>
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