From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Tue,  5 Jul 2011 08:16:48 -0400
To: 9fans@9fans.net
Message-ID: <7b2dac703afeb364c6bb011f89b9b4b1@ladd.quanstro.net>
In-Reply-To: <201107050946.31302.dexen.devries@gmail.com>
References: <BANLkTim=JAO0bPPuCpCBS24jXs0j5ja9bQ@mail.gmail.com>
	<201107050946.31302.dexen.devries@gmail.com>
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Subject: Re: [9fans] debugging rc
Topicbox-Message-UUID: fabb435e-ead6-11e9-9d60-3106f5b1d025

> On Tuesday 05 of July 2011 09:31:43 Rudolf Sykora wrote:
> > (...)
> > Is there any better way? Can rc be told to give some
> > more helpful info?
>
> there are:
> flag x +
> flag r +
>
> the output produced by r + is somewhat strange, but may be good enough. In your case, it shows difference between *$a* and *$a^*:
>
> the former is:
>
> Xdol (a*) () ()
> Xmark () ()
> Xword () () ()
> Xconc (*) () ()
> rc: null list in concatenation

this is a trace of the rc virtual machine.  it's not easy to follow, or
helpful in most cases.

if the problem is the null list in concatination, i made a small change
to rc to give more information about these problems in the error
message on steve's suggestion.

this version of rc is available as quanstro/futharc or on the 9atom
cd.

- erik