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

[GHC]

#10627: Regression: cabal install of numeric-prelude hangs
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        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:
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Comment (by George):

 Replying to [comment:11 Lemming]:
 > I attached a minimal example that you can run with:
 > {{{
 > $ ghc-7.10.1.20150630 -O RealRing.hs
 > [1 of 1] Compiling RealRing         ( RealRing.hs, RealRing.o )
 >
 > RealRing.hs:11:6: Warning:
 >     Rule "NP.roundSimple :: a -> Word" may never fire
 >       because ‘roundSimple’ might inline first
 >     Probable fix: add an INLINE[n] or NOINLINE[n] pragma on
 ‘roundSimple’
 > ^C
 > }}}
 Thanks! That fails for me also. It works if I compile without the -O

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10627#comment:14>
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