[GHC] #16219: Backpack - TH+indefinite module interface file error

[GHC]

#16219: Backpack - TH+indefinite module interface file error
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        Reporter:  lightandlight     |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.7
      Resolution:                    |             Keywords:  backpack
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5475
       Wiki Page:                    |
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Comment (by ezyang):

 No, this is fine :)

 Lens generation shouldn't have problems on code front, because the splices
 should only ever refer to code in the lens package, which should be fully
 compiled at this point. But maybe the problem is we don't get good
 information about abstract data types at this time?

 I guess it would be good to see if this works at all or not at the moment.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16219#comment:11>
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