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Re: gab-buffer issue

From: Mark H Weaver
Subject: Re: gab-buffer issue
Date: Fri, 27 Jun 2014 10:06:48 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)

Hi Mario,

Mario Domenech Goulart <address@hidden> writes:
> I'm using the CHICKEN port [1] of Guile's gap-buffer implementation and
> noticed a strange behavior in a simple test case.  I can reproduce that
> behavior on Guile 2.0.5 and 2.0.9, but not on Guile 2.0.11.

In Guile versions 2.0.0 - 2.0.9, there was a bug in 'string-copy!' such
that it did not work properly when the source and destination ranges
overlapped.  The characters were always copied starting from the lowest
index, so it would fail when moving a block of characters to higher
indices.  'string-copy!' is used by 'substring-move!', which in turn is
used by 'gb-goto-char'.

The bug was introduced in f846bd1a8f0e0d366fb8bb6944598641bc3dd246 when
the SRFI-13 functions were updated for Unicode, and fixed in


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