Fix class2defs self overlapping glyphsets

2020-12-01 23:38:12 +07:00 · 2020-12-01 23:38:12 +07:00 · 75f314b149
commit 75f314b149
parent 47c85d9afa
1 changed files with 3 additions and 1 deletions
--- a/Lib/fontTools/otlLib/builder.py
+++ b/Lib/fontTools/otlLib/builder.py
@ -2558,11 +2558,13 @@ class ClassDefBuilder(object):
        if isinstance(glyphs, (set, frozenset)):
            glyphs = sorted(glyphs)
        glyphs = tuple(glyphs)
+        tempglyphs = set()
        if glyphs in self.classes_:
            return True
        for glyph in glyphs:
-            if glyph in self.glyphs_:
+            if glyph in self.glyphs_ or glyph in tempglyphs:
                return False
+            tempglyphs.add(glyph)
        return True

    def add(self, glyphs):