[GHC] #12596: can't find interface-file declaration

[GHC]

#12596: can't find interface-file declaration
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        Reporter:  mwotton           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by j.waldmann):

 I ran into this when trying to use a derived instance for TH.Lift (for
 some algebraic data type that used Text somewhere).

 Some web searching turned up this work-around (use TH.dataToExpQ)

 https://stackoverflow.com/questions/38143464/cant-find-inerface-file-
 declaration-for-variable

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12596#comment:7>
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