bug#46155: 28.0.50; Regression: buffer contents flicker on macOS frames when

[martin rudalics]

>> Where do you type those letters?  Into the normal frame?
>
> No, into the minibuffer-only frame.  After `make-frame` the
> minibuffer-only frame became focused and accept input.

Works here on Debian without problems, the minibuffer-only frame expands
by one character as expected.  I still doubt that this is an NS problem.

>> Some other function that resizes the frame more conservatively or
>> sporadically?
>
> I've set the `resize-mini-frames` to this function:
>
>      (defun test/resize (frame)
>        (modify-frame-parameters
>         frame `((width . ,(+ 80 (random 20))))))
>
> After each letter typed, the minibuffer-only frame is resized several
> times.  The text is not visible during resize.

Can you try with a function that explicitly keeps the height constant -
i.e., calls 'fit-frame-to-buffer' with ONLY set to 'horizontally'.

martin