[GHC] #10762: On Windows, out-of-codepage characters can cause GHC build to fail

[GHC]

#10762: On Windows, out-of-codepage characters can cause GHC build to fail
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        Reporter:  snoyberg      |                   Owner:  snoyberg
            Type:  bug           |                  Status:  new
        Priority:  normal        |               Milestone:
       Component:  Compiler      |                 Version:  7.10.2
      Resolution:                |                Keywords:
Operating System:  Windows       |            Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown  |               Test Case:
      Blocked By:                |                Blocking:
 Related Tickets:  #6037         |  Differential Revisions:
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Comment (by Ben Gamari <bgamari.foss@…>):

 In [changeset:"22aca5368864070bbed3b44dca3ce57e243bf415/ghc"
 22aca536/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="22aca5368864070bbed3b44dca3ce57e243bf415"
 Transliterate unknown characters at output

 This avoids the compiler from crashing when, for example, a warning
 contains a non-Latin identifier and the LANG variable is set to C.
 Fixes #6037.

 Test Plan:
 Create a Haskell source file containing an identifier with non-Latin
 characters and no type signature. Compile with `LANG=C ghc -Wall
 foo.hs`, and it should fail. With this patch, it will succeed.

 Reviewers: austin, rwbarton, bgamari

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D1153

 GHC Trac Issues: #6037, #10762
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10762#comment:11>
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