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bug#5639: 23.1.92; Undo doesn't work

From: Glenn Morris
Subject: bug#5639: 23.1.92; Undo doesn't work
Date: Wed, 24 Feb 2010 13:59:05 -0500
User-agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/)

Torsten Bronger wrote:

> If I visit the *scratch* buffer, enter a character, and use C-x u, the
> whole buffer ist emptied and the error message "Error: No further undo
> information" appears.

I cannot reproduce this, unless I press C-x u twice, in which case
emptying the whole buffer is the expected behaviour. (The insertion of
the initial scratch buffer text has been undoable in this way since
Emacs 22.1.)

> Similarly, undoing undo doesn't work anymore by using undo, hitting
> e.g. a cursor key and using undo again (for undoing the first undo).

I cannot reproduce this at all (with `emacs -Q').

> In GNU Emacs (x86_64-unknown-linux-gnu)
>  of 2010-02-23 on wilson

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