bug#50096: args-out-of-range in redisplay_internal

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Cc: 50096@debbugs.gnu.org
> Date: Thu, 19 Aug 2021 10:17:22 +0300
> 
> Fortunately, finally I found the shortest test case 100% reproducible
> in 'emacs -Q'.  The line '(set-buffer (get-buffer-create "*test*"))'
> is not necessary, it just causes a slightly different error.
> Without 'set-buffer', the error is: (args-out-of-range 1737)
> With 'set-buffer', the error is: (args-out-of-range 1737 1737)

Thanks.  This actually produces an assertion violation here (I guess
your Emacs is compiled without --enable-checking).  I'll work on this.