[GHC] #8635: GHC optimisation flag ignored when importing a local module with derived type classes

[GHC]

#8635: GHC optimisation flag ignored when importing a local module with derived
type classes
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        Reporter:  NeilMitchell      |                Owner:  RolandSenn
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.6.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #9370 #13002      |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RolandSenn):

 * owner:  (none) => RolandSenn
 * related:  #9370 => #9370 #13002


Comment:

 [https://ghc.haskell.org/trac/ghc/ticket/13002#comment:18 | See ticket
 #13002 comment 18]

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8635#comment:7>
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