[NTG-context] fallbacks

["Thomas A. Schmitz via ntg-context" <ntg-context@ntg.nl>]

Hi all,

today, I was struggling with a fallback font I had defined, and I 
discovered that the key "check" doesn't work as I expected. Here's a 
small example:

\definefallbackfamily [presentation] [serif] [TeXGyreTermes] 
[range=0x2329-0x232A,check=yes]
\definefontfamily [presentation] [serif] [AntykwaTorunska]
\setupbodyfont [presentation,12pt]

\starttext

(〈P〉)

\stoptext

With this input, the two characters 〈 and 〉 are not typeset; in the log, 
I find

fonts           > checking > char 〈 (U+02329) in font 
'AntykwaTorunska-Regular' with id 1: missing
fonts           > checking > char 〉 (U+0232A) in font 
'AntykwaTorunska-Regular' with id 1: missing

If I have "check=no," the characters are taken from termes and replaced. 
I was under the impression that "check" should, well, check if the 
characters are not in the main font and fall back to the fallback font 
if they are not, but this doesn't appear to be the case. So what does 
"check" do? Or is this a bug?

Have a great weekend

Thomas
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