bug#23871: 25.1.50; Undo unexpectedly leads to blank buffer

[Eli Zaretskii]

> From: Markus Triska <triska@metalevel.at>
> Cc: Eli Zaretskii <eliz@gnu.org>,  23871@debbugs.gnu.org
> Date: Sat, 02 Jul 2016 22:53:37 +0200
> 
> (2) at a position that is outside the buffer (point 323 of 322).

This is not outside the buffer, this is EOB.  Try "M->" in any buffer,
and then type "C-x =".

(The above comment is meant to make the facts accurate, it doesn't
change the main issue discussed here.)