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Asked: 2026-05-10T21:13:27+00:00

I’m writing some disposable Haskell scripts to solve some of the Project Euler problems.

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I’m writing some disposable Haskell scripts to solve some of the Project Euler problems. I don’t really want to have to compile them because of the number of changes I’m constantly having to make, but in a few cases I’ve found that I’ve run out of stack space.

The documentation for runhaskell says that the following syntax should increase the stack space:

runhaskell +RTS -K5M -RTS Script.hs

This never, ever works (in any permutation I’ve tried). The stack size always remains 8,388,608. This is maddening, and I haven’t found much help on Google.

Any suggestions? What am I doing wrong?

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1 Answer

  1. I’m guessing you’re using GHC. Chapter 4 of the User’s Guide of the newly released 6.10.1 says:

    The only runghc flag currently is -f /path/to/ghc, which tells runghc which GHC to use to run the program.

    I don’t see a bug logged at http://hackage.haskell.org/trac/ghc . Seems pretty lame to me. I’d suggest asking on irc #ghc, or the cvs-ghc mailing list.

    Of the other Haskell compilers/interpreters, only nhc98 seems allow you to set the max stack size. Depending on your OS, nhc98 could be an option.

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