bug#23935: 25.1.50; simple reproducible crash for emacs -Q: `M-: (+ 1997 120 400)'

[Drew Adams]

> > > Middle/Near East was successful.  Clicking once more crashed Emacs.
> >
> > Looks like your problem is more basic than just one font.  Do other
> > (older) Emacs versions also crash trying to display HELLO?
> 
> One more thing to try is start Emacs like this:
> 
>   emacs -Q -xrm Emacs.fontBackend:gdi
> 
> and then see if "C-h H" crashes Emacs.

No, it does not crash (I used runemacs instead of emacs - let me know
if that invalidates the test).

This, BTW, is what it shows for Bengali:

Bengali (বাংলা) নমস্কার