• [feaLib] Skip references to named lookups if the lookup block definition is empty, similarly to makeotf. This also fixes an AttributeError while generating aalt feature (#2276, #2277).
• [subset] Fixed bug with --no-hinting implementation for Device tables (#2272, #2275). The previous code was alwyas dropping Device tables if no-hinting was requested, but some Device tables (DeltaFormat=0x8000) are also used to encode variation indices and need to be retained.
• [otBase] Fixed bug in getting the ValueRecordSize when decompiling MVAR table with lazy=True (#2273, #2274).
• [varLib/glyf/gvar] Optimized and simplified GlyphCoordinates and TupleVariation classes, use bytearray where possible, refactored phantom-points calculations. We measured about 30% speedup in total time of loading master ttfs, building gvar, and saving (#2261, #2266).
• [subset] Fixed AssertionError while pruning unused CPAL palettes when 0xFFFF is present (#2257, #2259).