[GHC] #10745: Error in fusion when compiling Data.Yaml

[GHC]

#10745: Error in fusion when compiling Data.Yaml
---------------------------------+-----------------------------------------
        Reporter:  nclarke       |                   Owner:
            Type:  bug           |                  Status:  merge
        Priority:  normal        |               Milestone:
       Component:  Compiler      |                 Version:  7.10.2
      Resolution:                |                Keywords:
Operating System:  Linux         |            Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown  |               Test Case:
      Blocked By:                |                Blocking:
 Related Tickets:                |  Differential Revisions:
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Changes (by nclarke):

 * milestone:  7.10.3 =>


Comment:

 I got this on both `0.8.11` and `0.8.12`, but I likewise have been unable
 to reproduce in a fresh sandbox. It happened consistently when building in
 one particular sandbox, and I'm surprised that the compiler was doing was
 being affected by this, but apparently it was.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10745#comment:4>
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