Issue #22775: Fixed unpickling of Cookie.SimpleCookie with protocol 2.
Patch by Tim Graham.
diff --git a/Lib/Cookie.py b/Lib/Cookie.py
index d674437..0b15531 100644
--- a/Lib/Cookie.py
+++ b/Lib/Cookie.py
@@ -591,8 +591,12 @@
 
     def __setitem__(self, key, value):
         """Dictionary style assignment."""
-        rval, cval = self.value_encode(value)
-        self.__set(key, rval, cval)
+        if isinstance(value, Morsel):
+            # allow assignment of constructed Morsels (e.g. for pickling)
+            dict.__setitem__(self, key, value)
+        else:
+            rval, cval = self.value_encode(value)
+            self.__set(key, rval, cval)
     # end __setitem__
 
     def output(self, attrs=None, header="Set-Cookie:", sep="\015\012"):
diff --git a/Lib/test/test_cookie.py b/Lib/test/test_cookie.py
index 41ba60f..36cd52e 100644
--- a/Lib/test/test_cookie.py
+++ b/Lib/test/test_cookie.py
@@ -3,6 +3,7 @@
 from test.test_support import run_unittest, run_doctest, check_warnings
 import unittest
 import Cookie
+import pickle
 
 
 class CookieTests(unittest.TestCase):
@@ -141,6 +142,18 @@
             self.assertEqual(dict(C), {})
             self.assertEqual(C.output(), '')
 
+    def test_pickle(self):
+        rawdata = 'Customer="WILE_E_COYOTE"; Path=/acme; Version=1'
+        expected_output = 'Set-Cookie: %s' % rawdata
+
+        C = Cookie.SimpleCookie()
+        C.load(rawdata)
+        self.assertEqual(C.output(), expected_output)
+
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            C1 = pickle.loads(pickle.dumps(C, protocol=proto))
+            self.assertEqual(C1.output(), expected_output)
+
 
 def test_main():
     run_unittest(CookieTests)