[GHC] #9813: Error when reifying type constructor

[GHC]

#9813: Error when reifying type constructor
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        Reporter:  owst              |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Template Haskell  |              Version:  7.8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1899
       Wiki Page:                    |
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Comment (by owst):

 I can confirm that with `$(return [])` the code compiles on 7.8.3 and
 7.10.3.

 My issue is that the `$(return [])` trick seems to be just that, a trick,
 required to make GHC accept a program that naively appears reasonable. I
 was hoping to be able to make a (small, I thought) change to GHC to allow
 this program to work without the trick.

 I know this isn't the most-important issue, but I was hoping to find a
 small ticket to work on as a first go at hacking on GHC that a) I
 understand the need for (albeit perhaps minor!), and b) is reasonably
 small, so I don't bite off more than I can chew.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9813#comment:36>
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