[GHC] #10279: panic on haskell-src-exts

[GHC]

#10279: panic on haskell-src-exts
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        Reporter:  throwaway123      |                   Owner:  ezyang
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Linux             |            Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash                              |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by ezyang):

 I can fix the proximal error fairly easily; just remove the unconditional
 lookup from `mkQualPackage`. I'm less clear why haskell-src-exts is not in
 the database.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10279#comment:4>
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