[Haskell-cafe] heap issues

Spencer Janssen spencerjanssen at gmail.com
Thu Jul 27 17:38:03 EDT 2006

ghci keeps the value of your last computation in a special variable
called "it".  Therefore, the value of your last run can't be garbage
collected until the current run is finished.  Try "print run" or type
in a dummy expression in between runs.

Spencer Janssen

On 7/27/06, Jeff Polakow <jeff.polakow at db.com> wrote:
> Hello,
>   Why would ghci run out of heap space (and crash) the second time I run a
> computation?
> More specifically, I have a ghci session which goes something like this:
>     *Analysis>run
>     [ ... print out of a very long list ...]
>     *Analysis>run
>     [ ... partial print out
>     GHC's heap exhausted: current limit is 268435456 bytes;
>     Use the `-M<size>' option to increase the total heap size.
> Shouldn't the garbage collector free up everything in between my top-level
> function executions?
> Also, there doesn't appear to be a  '-M<size>' flag for ghc (I'm using 6.4.2
> on windows xp).
> thanks,
>   Jeff
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