[GHC] #14168: Installing math-functions with GHC-8.2.1 on windows crashed

[GHC]

#14168: Installing math-functions with GHC-8.2.1 on windows crashed
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        Reporter:  Qinka         |                Owner:  (none)
            Type:  bug           |               Status:  infoneeded
        Priority:  normal        |            Milestone:
       Component:  Compiler      |              Version:  8.2.1
      Resolution:                |             Keywords:
Operating System:  Windows       |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Changes (by Phyx-):

 * os:  Unknown/Multiple => Windows
 * architecture:  x86_64 (amd64) => Unknown/Multiple


Comment:

 Hmmm the output is quite suspicious. Both `expm1` and `GHC.Float` from the
 GHC build output show some character corruption. `mbstowcs` which `mkPath`
 uses fails when it encounters an invalid multibyte character.

 The source doesn't seem to contain this so I wonder where the corruption
 happened.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14168#comment:2>
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