Fix crash when encountering match statement (#11749)

The crash only happens with compiled mypy on Python 3.10, I think.
python · Dec 15, 2021 · ae93837 · ae93837
1 parent 69dbb47
commit ae93837
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/mypy/fastparse.py b/mypy/fastparse.py
@@ -1285,9 +1285,11 @@ def visit_Index(self, n: Index) -> Node:
         # cast for mypyc's benefit on Python 3.9
         return self.visit(cast(Any, n).value)
 
-    def visit_Match(self, n: Any) -> None:
+    def visit_Match(self, n: Any) -> Node:
         self.fail("Match statement is not supported",
                   line=n.lineno, column=n.col_offset, blocker=True)
+        # Just return some valid node
+        return PassStmt()
 
 
 class TypeConverter: