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Re: Running files from command-line vs. load'ing them

From: Andy Wingo
Subject: Re: Running files from command-line vs. load'ing them
Date: Sun, 28 Dec 2008 11:59:05 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux)


On Sat 27 Dec 2008 17:27, Daniel Kraft <address@hidden> writes:

> $ myguile -L .. program.scm
> ERROR: In procedure string-contains:
> ERROR: Wrong type argument in position 1 (expecting string): #<winder
> b7d6e360>

I think this means that your extension missed a GC reference somewhere,
and that a SCM that you have has been freed and replaced with a

("Winders" are part of guile's dynamic-wind implementation and are not
normally exposed to scheme -- a pretty good indication that this is the

Probably what's happening is that GC runs at different times when
running from the command line, or when running with the repl loaded; or
that it has marked but not yet swept that cell; etc.

> As I understand it, all three calls above should (more or less) do the
> same thing.

Yep. But I think you'll find you forgot a GC reference. Check your SMOB
marking functions, or scm_gc_protect_object() calls for global



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