[GHC] #12158: ghc: panic! (the 'impossible' happened) translateConPatVec: lookup

[GHC]

#12158: ghc: panic! (the 'impossible' happened)  translateConPatVec: lookup
-------------------------------------+-------------------------------------
        Reporter:  wozgonon          |                Owner:  gkaracha
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  GHCi              |              Version:  8.0.1
      Resolution:                    |             Keywords:
                                     |  PatternMatchWarnings
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13644            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by philderbeast):

 I may have struck this problem too.

 {{{
 [34 of 59] Compiling Published.Bedford
 ( /flare-timing/earth/test-suite-earth/Published/Bedford.hs, interpreted )
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.2.2 for x86_64-apple-darwin):
         translateConPatVec: lookup
 }}}

 This [[https://github.com/BlockScope/flare-
 timing/commit/07ea720ec98c9c756f7ed63ee7b80f574eb00a07|revision]]
 introduced the problem from which I was able to
 [[https://github.com/BlockScope/flare-
 timing/commit/b3963f61f97d0c70d726319260241bbedbe45f7f|workaround]] by
 using qualified imports.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12158#comment:14>
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