[GHC] #9971: GHC 7.10 dies with "out of memory"

[GHC]

#9971: GHC 7.10 dies with "out of memory"
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        Reporter:  albertov          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1-rc1
      Resolution:                    |                Keywords:
Operating System:  Linux             |            Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash                              |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by albertov):

 Ok, now for real. It seems the culprit is the code generated by
 `derivingUnbox "Point"`. The changes that sidestep the bug are
 [https://github.com/meteogrid/sigym4-geometry/compare/ghc-9971?expand=1#diff-0
 these].

 I've reconfigured with `cabal configure --disable-optimization --ghc-
 options="-ddump-splices" --enable-tests -w
 /usr/local/bin/ghc-7.10.0.20141222`, added back the `derivingUnbox` part
 (which now I'm positive that it's the real culprit) and I'm attaching the
 build output with the generated TH code.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9971#comment:11>
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