[GHC] #12692: Can't find interface-file decl with Typeable

[GHC]

#12692: Can't find interface-file decl with Typeable
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        Reporter:  crockeea          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 If anyone can offer an easy way to reproduce this, it'd be great.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12692#comment:1>
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