>> However, there are more GSUB lookups, referenced via chained
>> context lookups, AFAICS. Example: lookup 76, which gets referenced
>> in lookup 4.
>>
>> I presume that this is not intentional behaviour.
>
> It *is* intentional behavior. What's your exact use case?
Actually, I don't really care about this particular function. What I
want is to find all glyphs that are involved in substitution, and I
stumbled upon the fact that this substitution is not listed...
However, I see that the mapping result of lookup 76, `glyph242', is
part of the set returned by `hb_ot_layout_lookup_collect_glyphs', so
everything's' fine. Sorry for the noise.
It would be *great* to have a bit more documentation that mentions
such potential pitfalls :-)
Werner
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