[GHC] #9800: Panic when building HEAD with BuildFlavour=quickest: "Can't use Integer in integer-*"

[GHC]

#9800: Panic when building HEAD with BuildFlavour=quickest: "Can't use Integer in
integer-*"
-------------------------------------+-------------------------------------
              Reporter:  thomie      |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.8.3
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:  Building    |       Blocked By:
  GHC failed                         |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------

Comment (by thomie):

 Using `BuildFlavour=quick` does work.

 Note to self: after this is fixed, also check #9302.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9800#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler