Glyphs creates malformed CFF table?

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

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

This seems to be a footnotes problem after all.