Glyphs creates malformed CFF table?

Glyphs
1

I created a new file in Glyphs, turned off exporting for all characters, (apart from .notdef) and exported as OTF. See: ttx-669.zip (1.8 KB)

The font gave ttx a headache, and Khaled says:

I think the CFF table is broken. It uses a predefined charset (id=0, ISOAdobe) and the spec says:

A font may use a predefined charset if it exactly matches in the first nGlyphs

But the font has exactly one glyph, so it does not match the predefined charset.

So over to you.

2

That is interesting. Glyphs is doing that since the beginning and nobody complained about that, yet. I have a look.

3

This seems to be a footnotes problem after all.