[GHC] #11742: 'Strict' extension is incompatible with 'deriving' mechanism

[GHC]

#11742: 'Strict' extension is incompatible with 'deriving' mechanism
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        Reporter:  awson             |                Owner:
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by awson):

 I tried it on quite recent ghc-8.1.20160317.

 Another thing I've forgotten to mention is that the bug needs `-O` to
 manifest itself. With no optimizations it doesn't happen.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11742#comment:4>
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