Re: Patch for fit-window-to-buffer

[martin rudalics]

> I found a bug in the master and emacs-27 versions of fit-window-to-buffer.
> Another window's data might be used to determine the new width. I'm
> attaching a patch which I believe fixes the issue.

Thanks for finding these blatant bugs.  The 'window-start' fix is OK.

The 'point-max' fix could be improved: Since 'window-text-pixel-size'
has to make the buffer shown in WINDOW current before processing its
text anyway, it would IMO be more efficient to wrap the entire
'window-text-pixel-size' call into a

(with-current-buffer (window-buffer window)

form and thus avoid selecting WINDOW while providing the right buffer
for 'window-text-pixel-size' right away.  Can you try that?

Finally, the (frame-pixel-width) argument looks fishy too - it should
probably be (frame-pixel-width (window-frame window)).  Can you verify
that as well?

Thanks, martin