[GHC] #10627: Regression: cabal install of numeric-prelude hangs (was: cabal install of numeric-prelude hangs)

[GHC]

#10627: Regression: cabal install of numeric-prelude hangs
-------------------------------------+-------------------------------------
        Reporter:  George            |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  high              |               Milestone:  7.10.2
       Component:  Compiler          |                 Version:  7.10.2-rc2
      Resolution:                    |                Keywords:
Operating System:  MacOS X           |            Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+-------------------------------------
Description changed by George:

Old description:

> While trying to do cabal install species with 7.10.2rc2 I discovered that
> it hangs compiling numeric-prelude in src/Algebra/RealRing.h. It doesn't
> seem to be busy computing as cpu usage is 0%
> {{{
> ghc -V
> The Glorious Glasgow Haskell Compilation System, version 7.10.1.20150630
> cabal install --verbose=3 numeric-prelude
> ...
> [39 of 97] Compiling Algebra.RealRing ( src/Algebra/RealRing.hs,
> dist/build/Algebra/RealRing.o )
> ...
>
> Result size of Float out(FOS {Lam = Just 0,
>                               Consts = True,
>                               OverSatApps = True})
>   = {terms: 3,506, types: 3,224, coercions: 4}
> *** Common sub-expression:
> Result size of Common sub-expression
> }}}

New description:

 While trying to do cabal install species with HP 7.10.2rc2 I discovered
 that it hangs compiling numeric-prelude in src/Algebra/RealRing.h. It
 doesn't seem to be busy computing as cpu usage is 0%.
 It also hangs with HP 7.10.1.20150612 but works with HP 7.10.1.20150601
 {{{
 ghc -V
 The Glorious Glasgow Haskell Compilation System, version 7.10.1.20150630
 cabal install --verbose=3 numeric-prelude
 ...
 [39 of 97] Compiling Algebra.RealRing ( src/Algebra/RealRing.hs,
 dist/build/Algebra/RealRing.o )
 ...

 Result size of Float out(FOS {Lam = Just 0,
                               Consts = True,
                               OverSatApps = True})
   = {terms: 3,506, types: 3,224, coercions: 4}
 *** Common sub-expression:
 Result size of Common sub-expression
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10627#comment:2>
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