instance.interpolatedFont.masters[0] returns empty master

Scripting
1

Hello, I am trying to work with instance.interpolatedFont in order to circumvent some annoying bugs in the addAsMaster() process.

interpolated = Font.instances[0].interpolatedFont

Font.masters.append(interpolated.masters[0])

What I get as my added master is simply an empty master; all glyphs are empty. Trying print(interpolated.masters[0].glyphs["a"].layers[0].shapes) gives me <GSPath 39 Nodes>, so there is something that gets lost along the way. Any ideas? Thanks!

2

Adding the master is just doing that. The layers in each glyph are not copied over. Can you try:

interpolated = Font.instances[0].interpolatedFont

Font.addFontMasterAndContent_(interpolated.masters[0])

print(interpolated.masters[0].glyphs["a"].layers[0].shapes should not work. A master has no glyphs.