[GHC] #10822: GHC inconsistently handles \\?\ for long paths on Windows

[GHC]

#10822: GHC inconsistently handles \\?\ for long paths on Windows
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        Reporter:  snoyberg      |                Owner:  (none)
            Type:  bug           |               Status:  patch
        Priority:  normal        |            Milestone:  8.6.1
       Component:  Compiler      |              Version:  7.10.2
      Resolution:                |             Keywords:
Operating System:  Windows       |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):  Phab:D4416
       Wiki Page:                |
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Changes (by Phyx-):

 * status:  new => patch
 * differential:   => Phab:D4416
 * milestone:   => 8.6.1


Comment:

 GCC/libiberty still needs a patch but this takes care of the Haskell side.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10822#comment:4>
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