Issue #7410: deepcopy of itertools.count() erroneously reset the count.
diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py
index dbc941f..2ba1e8e 100644
--- a/Lib/test/test_itertools.py
+++ b/Lib/test/test_itertools.py
@@ -5,6 +5,8 @@
import sys
import operator
import random
+import copy
+import pickle
maxsize = test_support.MAX_Py_ssize_t
minsize = -maxsize-1
@@ -215,6 +217,13 @@
r2 = 'count(%r)'.__mod__(i).replace('L', '')
self.assertEqual(r1, r2)
+ # check copy, deepcopy, pickle
+ for value in -3, 3, sys.maxint-5, sys.maxint+5:
+ c = count(value)
+ self.assertEqual(next(copy.copy(c)), value)
+ self.assertEqual(next(copy.deepcopy(c)), value)
+ self.assertEqual(next(pickle.loads(pickle.dumps(c))), value)
+
def test_cycle(self):
self.assertEqual(take(10, cycle('abc')), list('abcabcabca'))
self.assertEqual(list(cycle('')), [])