subset: FeatureVariations may None in GSUB 1.1

Fixes #2023
fonttools · Jul 27, 2020 · e63ecc5 · e63ecc5
1 parent 3ad201c
commit e63ecc5
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/Lib/fontTools/subset/__init__.py b/Lib/fontTools/subset/__init__.py
@@ -1635,9 +1635,13 @@ def prune_post_subset(self, font, options):
 	#	table.ScriptList = None
 
 	if hasattr(table, 'FeatureVariations'):
-		if not (table.FeatureList and table.FeatureVariations.FeatureVariationRecord):
+		# drop FeatureVariations if there are no features to substitute
+		if table.FeatureVariations and not (
+			table.FeatureList and table.FeatureVariations.FeatureVariationRecord
+		):
 			table.FeatureVariations = None
 
+		# downgrade table version if there are no FeatureVariations
 		if not table.FeatureVariations and table.Version == 0x00010001:
 			table.Version = 0x00010000