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bug#3688: Also need (auto-fill-mode nil) to trigger this bug

From: Alan Mackenzie
Subject: bug#3688: Also need (auto-fill-mode nil) to trigger this bug
Date: Fri, 26 Jun 2009 15:26:03 +0000
User-agent: Mutt/1.5.9i

Hi, Kees,

On Fri, Jun 26, 2009 at 01:56:48PM +0200, Kees Bakker wrote:
> Hi,

> In my report I forgot to run emacs with -Q, but the problem is still
> present with -Q. But here is extra information to reproduce the error.

> After entering the suggested C text (and emacs is in a basic C mode)
> you have to evaluate the following before the error can be reproduced.
>    (auto-fill-mode nil)

> In the status bar it shows "*C/l Abbrev Fill)". In the buffer you'll
> have the following.

>    /*type a space here=>
>    /* 3 tabs following after this=>                   */

> (Notice that there are 3 TABs before the closing C comment.) If you
> type a space on the first comment line, you'll see that it jumps back
> 21 positions.

OK, I've got it now.  As a matter of interest, M-x auto-fill-mode is
equivalent to your expression.

It also happens in Emacs 22, and it also happens on the console, not just
on a GUI system.  So it looks like a CC mode bug.

Give me a few days to track this down.

> If you evaluate this again, the problem goes away.
>    (auto-fill-mode nil)
> Now, the "Fill" flag is gone from the status bar.

Again, thanks for reporting this bug.

> Kind regards,
> Kees Bakker

Alan Mackenzie (Nuremberg, Germany).

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