[GHC] #10691: certain operations in new integer-gmp are too lazy

[GHC]

#10691: certain operations in new integer-gmp are too lazy
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        Reporter:  rwbarton          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  libraries         |                 Version:  7.10.1
  (other)                            |
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by hvr):

 Replying to [comment:2 rwbarton]:
 > You can still save the work of doing a multiplication in GMP, you just
 have to force evaluation of the other argument when you do so.

 I'm not sure I understand that; a multiplication with 0 would have made no
 sense to dispatched a call into GMP anyway, that's not the cost I'm
 worried about. It's rather forcing of the other argument that may trigger
 all sorts of potentially costly evaluations and GMP-calls only to
 ultimately absorb it into a `0`-result...

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10691#comment:3>
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