[luatex] Spurious? Missing character warnings from luatex 0.80

[Ulrike Fischer]

Am Tue, 25 Aug 2015 14:43:36 +0100 schrieb David Carlisle:

> Hi,
> The following plain luatex document
> 
> 
> \tracingonline1
> 
> $b_{\hbox{\char 13}}$
> 
> \bye
> 
> 
> 
> Produces a warning
> 
> Missing character: There is no ã (U+00E3) in font cmr10!
> 
> in texlive 2015 luatex (0.80)

I get it in miktex too. And the number changes if I add some text
before the math

\tracingonline1
ab
$b_{\hbox{\char 13}}$

\bye

Missing character: There is no ÷ (U+00F7) in font cmr10!

with "a":
Missing character: There is no ñ (U+00F1) in font cmr10!

-- 
Ulrike Fischer 
http://www.troubleshooting-tex.de/