[GHC] #6132: Can't use both shebang line and #ifdef declarations in the same file.

[GHC]

#6132: Can't use both shebang line and #ifdef declarations in the same file.
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        Reporter:  gfxmonk           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  7.0.4
  (Parser)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:  runghc/T6132
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by rwbarton):

 It's because clang's CPP inserts a space before the `#` and then GHC no
 longer recognizes it as a shebang line. See #10044 for a related clang
 whitespace oddity.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/6132#comment:12>
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