fix bug

Instagram · Nov 30, 2023 · 2377202 · 2377202
1 parent f8a9b80
commit 2377202
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/libcst/_nodes/statement.py b/libcst/_nodes/statement.py
@@ -3239,7 +3239,7 @@ class MatchMapping(MatchPattern):
     rpar: Sequence[RightParen] = ()
 
     def _validate(self) -> None:
-        if isinstance(self.trailing_comma, Comma) and self.rest is not None:
+        if isinstance(self.trailing_comma, Comma) and self.rest is None:
             raise CSTValidationError("Cannot have a trailing comma without **rest")
         super(MatchMapping, self)._validate()