bug#19576: write-file writes the wrong buffer

[martin rudalics]

>> A silly example with emacs -Q is
>>
>> (defvar fun 0)
>>
>> (defun fun (frame)
>>     "..."
>>     (message "\n%s\n" (setq fun (1+ fun))) (ding))
>>
>> (add-hook 'window-size-change-functions 'fun)
>>
>> This gets me complete erratic behavior when moving point.
>
> Maybe I'm blind, but I don't see anything erratic.

OK.  Here the erratic behavior is caused by ‘eldoc-mode’.  In any case
‘window-size-change-functions’ is executed twice per redisplay IIUC.

> I see that, but does that mean we should remove the "once only"
> promise?

I'd just remove the qualifier "just".

martin