[GHC] #6037: Compile-time crash with sources with non-representable unicode characters

[GHC]

#6037: Compile-time crash with sources with non-representable unicode characters
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        Reporter:  akio              |                   Owner:  snoyberg
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.4.1
      Resolution:                    |                Keywords:
Operating System:  Linux             |            Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |               Test Case:  T6037
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  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/6037#comment:12>
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