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Editorial Team
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Asked: 2026-05-11T16:13:24+00:00

I have looked through the SMLNJ User Guide and can’t find anything about debugging

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I have looked through the SMLNJ User Guide and can’t find anything about debugging capabilities. I’d love to just see a stack trace, or step through a function. Is this possible. Are there other implementations for similar variants of SML that do provide this feature?

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  1. Editorial Team

    From section 3.3 of the SMLNJ faq:

    Q: Is there a debugger for SML/NJ?
    What ever happened to Tolmach’s
    debugger for SML/NJ 0.93?

    A: The short answer is no.

    Also:

    Debugging SML 

    * For years, no one had an SML debugger

    * Why?
          o No one had any bugs?
          o It is hard to write a debugger for SML
          o The user community wasn’t large enough

    * Likely all three are true

    There’s a .NET compiler, though, which claims to have some debugging support..

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