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bug#3356: 23.0.93; Loss of undo info in calc
From: |
Leo |
Subject: |
bug#3356: 23.0.93; Loss of undo info in calc |
Date: |
Sun, 24 May 2009 01:25:20 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux) |
On 2009-05-23 16:48 +0100, Jay Belanger wrote:
>> 1. M-x calc
>> 2. do some calculation for example: ' sqrt ( x ) RET a t x 5 RET
>> 3. type q to quit calc
>> 4. M-x calc to bring it back
>> 5. type U
>>
>> You will get "No further undo information is available".
>
> calc-quit sets the undo list to nil on purpose, probably to save limited
> memory in the early days. If there are still memory considerations,
> then calc-quit could truncate the undo list rather than remove it,
I think it should do its best to protect user's data. This option seems
very desirable.
> otherwise it'd be easy to have calc-quit not do anything with the undo
> list.
--
.: Leo :. [ sdl.web AT gmail.com ] .: I use Emacs :.