Issue 7410: deepcopy of itertools.count() reset the count.
diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py
index 2f449da..16e65ca 100644
--- a/Lib/test/test_itertools.py
+++ b/Lib/test/test_itertools.py
@@ -7,6 +7,8 @@
import sys
import operator
import random
+import copy
+import pickle
from functools import reduce
maxsize = support.MAX_Py_ssize_t
minsize = -maxsize-1
@@ -352,6 +354,13 @@
r2 = 'count(%r)'.__mod__(i).replace('L', '')
self.assertEqual(r1, r2)
+ # check copy, deepcopy, pickle
+ for value in -3, 3, maxsize-5, maxsize+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_count_with_stride(self):
self.assertEqual(lzip('abc',count(2,3)), [('a', 2), ('b', 5), ('c', 8)])
self.assertEqual(lzip('abc',count(start=2,step=3)),