[GHC] #13056: Deriving Foldable causes GHC to take a long time (GHC 8.0 ONLY)

[GHC]

#13056: Deriving Foldable causes GHC to take a long time (GHC 8.0 ONLY)
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        Reporter:  ezyang            |                Owner:
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:  8.0.3
       Component:  Compiler          |              Version:  8.0.2-rc2
      Resolution:                    |             Keywords:  deriving-perf
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12234            |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * status:  new => merge
 * milestone:   => 8.0.3


Comment:

 This can be merged alongside #12234.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13056#comment:8>
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