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diff --git a/‎lib/matplotlib/dates.py
Copy file name to clipboardExpand all lines: lib/matplotlib/dates.py
+3Lines changed: 3 additions & 0 deletions b/‎lib/matplotlib/dates.py
Copy file name to clipboardExpand all lines: lib/matplotlib/dates.py
+3Lines changed: 3 additions & 0 deletions
@@ -718,6 +718,9 @@ def __getattr__(self, name):
             return self.__dict__[name]
         return getattr(self._rrule, name)
 
+    def __setstate__(self, state):
+        self.__dict__.update(state)
+
 
 class DateLocator(ticker.Locator):
     """