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From: | Stefan Monnier |
Subject: | bug#23785: Emacs 25: 'Undo' overdoes things. |
Date: | Mon, 20 Jun 2016 10:04:01 -0400 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) |
> I don't understand why you say this. AFAICT, the problem is that the > buffer-undo-list doesn't have a nil after the command has happened. Hmm... I thought I had seen a trace showing that there was a nil before the revert-buffer that then disappeared. But it looks like I misremember. Sorry. > I think that it does -- it calls "insert_from_buffer" which then calls > "prepare_to_modify_buffer". > I *think* what is happening is that prepare_to_modify_buffer is being > called when buffer-undo-list is specbound to t -- hence the change does > not register as undoable change. That would be a good explanation, indeed. So I guess your patch is the right fix. Thank you. Stefan
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