bug#3356: 23.0.93; Loss of undo info in calc

On 2009-05-23 16:48 +0100, Jay Belanger wrote:
> Leo <[email protected]> writes:
> ...
>> 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,
> otherwise it'd be easy to have calc-quit not do anything with the undo
> list.
>
>> Incidentally, I wonder whether making the two windows dedicated is more
>> desirable than current behaviour.
>
> Maybe, but I wonder if this would cause problems in some situations.
> How would full-calc be affected, for instance.
>
> Jay

It seems this bug can be closed.

-- 
Leo's Emacs uptime: 1 day, 15 hours, 20 minutes, 27 seconds