[luatex] What happens to glyphs not in the font?

[Arno Trautmann]

Martin Schröder wrote:
> 2014-03-24 22:31 GMT+01:00 Arno Trautmann <Arno.Trautmann at gmx.de>:
>> What happens when I input a character that is not available in the current
>> font?
>
> I'd expect
> Missing character: There is no � in font cmr10!
> (maybe even with an "ß" :)

Well – no. The minimal example I posted compiles just fine, neither a 
warning or an error. (With an “eszett” in case it was broken by my mail 
client?)

cheers
Arno