[GHC] #12170: Add flag to control whether out of scope variables should be deferred with -fdefer-typed-holes

[GHC]

#12170: Add flag to control whether out of scope variables should be deferred with
-fdefer-typed-holes
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        Reporter:  mpickering        |                Owner:  ak3n
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #10569, #12156,   |  Differential Rev(s):  Phab:D2458
  #12406                             |
       Wiki Page:                    |
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Comment (by ertes):

 I'd be very grateful, if you could include the flag in 8.0.2, too.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12170#comment:7>
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