Merge pull request #2125 from silnrsi/bugfix1

Bugfix1
2020-12-16 12:15:00 +00:00 · 2020-12-16 12:15:00 +00:00 · 8f405dee52
commit 8f405dee52
parent 8f50e22278 ee87790326
1 changed files with 3 additions and 2 deletions
--- a/Lib/fontTools/otlLib/builder.py
+++ b/Lib/fontTools/otlLib/builder.py
@ -314,9 +314,10 @@ class ChainContextualRuleset:
        classdefbuilder = ClassDefBuilder(useClass0=False)
        for position in context:
            for glyphset in position:
-                if not classdefbuilder.canAdd(glyphset):
+                glyphs = set(glyphset)
+                if not classdefbuilder.canAdd(glyphs):
                    return None
-                classdefbuilder.add(glyphset)
+                classdefbuilder.add(glyphs)
        return classdefbuilder