Add missing location argument to raise
diff --git a/Lib/fontTools/feaLib/builder.py b/Lib/fontTools/feaLib/builder.py
index a164487..0af2f91 100644
--- a/Lib/fontTools/feaLib/builder.py
+++ b/Lib/fontTools/feaLib/builder.py
@@ -1560,7 +1560,8 @@
def add_conditionset(self, key, value):
if not "fvar" in self.font:
raise FeatureLibError(
- "Cannot add feature variations to a font without an 'fvar' table"
+ "Cannot add feature variations to a font without an 'fvar' table",
+ location=None,
)
# Normalize