Subject: Re: bug#9664: (format #t "~3tX") fails in the REPL

From: Andy Wingo <[email-masked]>
Date: Wed, 16 Nov 2011 23:15:00 +0100

On Wed 05 Oct 2011 20:18, Andy Wingo <[email-masked]> writes:

> It appears that there is some difference between the readline-enabled
> reader and the normal one.
>
>     $ meta/guile -q
>     scheme@(guile-user)> (port-column (current-output-port))
>     $1 = 21
>
> It is 0 with the readline reader.
>
> I don't think the set-port-column! fix is right.  Why is the newline not
> being chomped after the `(read)', I wonder?

That isn't the right question, it turns out.  21 is the length of the
`scheme@(guile-user)> ' prompt.  We need to set the output port column
to 0 after printing a prompt.  In the readline case it's different
because readline is the part that prints the prompt.

Fixed in stable-2.0.

Thanks for the report,

Andy
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