bug#5852: 23.1; Incorrect references in ses-mode

[Stefan Kangas <stefan@marxist.se>]

Hi Vincent,

Could you please take a look at the below bug report?  It was reported
in 2010, before you were listed as the maintainer of ses.el.

Thanks in advance.

Best regards,
Stefan Kangas


Göran Uddeborg <goeran@uddeborg.se> writes:

> I discovered this when emacs sometimes complains that I have circular
> references in ses-mode files where there shouldn't be any.  When
> investigating the ses file I've noticed some cells contain references
> that are incorrect.  When I remove these incorrect references, the
> complaints about circular references go away, so I strongly suspect
> the problems are related.  And even if I'm wrong, the incorrect
> references is a bug.
>
> While I haven't been able to create a simple test case where I get a
> circular reference complaint, I can easily get to a state where there
> are incorrect references.  Create a ses file with these keystrokes:
>
>     C-x C-f s . s e s <return> <tab> 1 <return> C-o 2 <return>
>     <tab> <left> ( + SPC B 1 SPC A 2 <return>
>     C-n C-o 3 <return> ( + SPC B 2 SPC A 3 <return> C-a
>     C-o 4 <return> C-p C-SPC C-f M-w C-n C-b C-y C-n C-y
>     C-x C-s
>
> In the resulting file, cell B2 has cell B4 incorrectly listed among
> its references:
>
>     (ses-cell B2 3 (+ B1 A2) nil (B3 B4))
>
> Only B3 does actually reference B2.
>
>
> In GNU Emacs 23.1.1 (x86_64-redhat-linux-gnu, GTK+ Version 2.18.3)
>  of 2009-12-02 on x86-3.fedora.phx.redhat.com
> Windowing system distributor `Fedora Project', version 11.0.10705000
> configured using `configure  '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--target=x86_64-redhat-linux-gnu' '--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--with-dbus' '--with-gif' '--with-jpeg' '--with-png' '--with-rsvg' '--with-tiff' '--with-xft' '--with-xpm' '--with-x-toolkit=gtk' 'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu' 'target_alias=x86_64-redhat-linux-gnu' 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic''
>
> Important settings:
>   value of $LC_ALL: nil
>   value of $LC_COLLATE: nil
>   value of $LC_CTYPE: nil
>   value of $LC_MESSAGES: nil
>   value of $LC_MONETARY: nil
>   value of $LC_NUMERIC: nil
>   value of $LC_TIME: nil
>   value of $LANG: sv_SE.utf8
>   value of $XMODIFIERS: nil
>   locale-coding-system: utf-8-unix
>   default-enable-multibyte-characters: t
>
> Major mode: SES
>
> Minor modes in effect:
>   tooltip-mode: t
>   tool-bar-mode: t
>   mouse-wheel-mode: t
>   menu-bar-mode: t
>   file-name-shadow-mode: t
>   global-font-lock-mode: t
>   font-lock-mode: t
>   blink-cursor-mode: t
>   global-auto-composition-mode: t
>   auto-composition-mode: t
>   auto-encryption-mode: t
>   auto-compression-mode: t
>   line-number-mode: t
>   transient-mark-mode: t
>
> Recent input:
> <tab> 1 <tab> <backspace> <return> C-o 2 <return> <tab> 
> <left> ( + SPC B 1 SPC A 2 <return> <return> <return> 
> C-n C-o 3 <return> ( + SPC B 2 SPC A 3 <return> C-n 
> C-o C-p C-o 4 <return> C-p C-SPC C-f M-w C-n C-b C-y 
> C-n C-y C-x C-s <help-echo> M-x r e p o r t - e m a 
> c s - b u g <return>
>
> Recent messages:
>   [2 times]
> Yanking...done
> Mark set
> Yanking...done
>   [2 times]
> Yanking...done
>   [2 times]
> Yanking...done
> Saving file /home/g=f6ran/x.ses...
> Wrote /home/g=f6ran/x.ses