[GHC] #11664: Core Lint failure when building warp-3.2.2

[GHC]

#11664: Core Lint failure when building warp-3.2.2
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        Reporter:  anton.dessiatov  |                Owner:
            Type:  bug              |               Status:  new
        Priority:  normal           |            Milestone:
       Component:  Compiler         |              Version:  7.10.3
      Resolution:                   |             Keywords:
Operating System:  Linux            |         Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown     |            Test Case:
      Blocked By:                   |             Blocking:
 Related Tickets:                   |  Differential Rev(s):
       Wiki Page:                   |
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Comment (by anton.dessiatov):

 Current `master` 57b4c5524fcbf02f61dfc8d9395906dc7f50f048 also fails to
 build `attoparsec-0.13.0.1` with core lint failure. Created #11665 for
 that.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11664#comment:9>
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