[GHC] #13185: haskell-relational-query: ghc: panic! (the 'impossible' happened)

[GHC]

#13185: haskell-relational-query: ghc: panic! (the 'impossible' happened)
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        Reporter:  LocutusOfBorg     |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:  build
  crash or panic                     |  relational-query with ghc 8.0.2
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Ahh, yes. Thanks for point this out. Indeed that is a rather significant
 jump and it shouldn't be hard to work out what it's from, given that there
 are only 300 commits or so between the releases. That being said, having
 had a brief look through the commits, nothing in particular jumps out.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13185#comment:11>
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