bug#73775: 30.0.90; vtable: can't handle 0 data rows

[Adam Porter <adam@alphapapa.net>]

Hi Eli, Augusto,

On 10/12/24 13:24, Eli Zaretskii wrote:
>> From: Augusto Stoffel <arstoffel@gmail.com>
>> Date: Sat, 12 Oct 2024 19:22:46 +0200
>>
>> This call produces the error (wrong-number-of-arguments #<subr max> 0):
>>
>>      (make-vtable
>>       :use-header-line nil
>>       :columns (mapcar (lambda (name) (list :name name :min-width 10))
>>       '("A" "B" "C"))
>>       :objects nil)
>>
>> The following would get rid of the error, but the resulting table
>> misbehaves slightly (say when I press S on it to sort).  Perhaps someone
>> else has a better idea.
>>
>> modified   lisp/emacs-lisp/vtable.el
>> @@ -861,9 +861,10 @@ vtable--compute-widths
>>                      (vtable--compute-width table (vtable-column-width column)))
>>                 ;; Compute based on the displayed widths of
>>                 ;; the data.
>> -              (seq-max (seq-map (lambda (elem)
>> +              (seq-max (or (seq-map (lambda (elem)
>>                                     (nth 1 (elt (cdr elem) index)))
>> -                                cache)))))
>> +                                    cache)
>> +                           '(0))))))
>>           ;; Let min-width/max-width specs have their say.
>>           (when-let ((min-width (and (vtable-column-min-width column)
>>                                      (vtable--compute-width
>>
>>
> 
> Adam, any comments or suggestions?

I may be mistaken, but this seems like a duplicate of bug#69454.

--Adam