Regression storing non-ASCII values on Python 2

[timgraham]

Bisected to 04f1c78

Failing test case (adapted from Django's test suite):

diff --git a/tests/test_memcache.py b/tests/test_memcache.py
index 321dc7b..03147d6 100644
--- a/tests/test_memcache.py
+++ b/tests/test_memcache.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 from __future__ import print_function

 import unittest
@@ -137,6 +138,14 @@ class TestMemcache(unittest.TestCase):
         value = self.mc.get(key)
         self.assertEqual(value, 5)

+    def test_unicode_value(self):
+        key = 'key'
+        value = six.u('Iñtërnâtiônàlizætiøn2')
+
+        self.mc.set(key, value)
+        cached_value = self.mc.get(key)
+        self.assertEqual(value, cached_value)
+
     def test_ignore_too_large_value(self):
         # NOTE: "MemCached: while expecting[...]" is normal...
         key = 'keyhere'

======================================================================
FAIL: test_unicode_value (__main__.TestMemcache)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "tests/test_memcache.py", line 147, in test_unicode_value
    self.assertEqual(value, cached_value)
AssertionError: u'I\xc3\xb1t\xc3\xabrn\xc3\xa2ti\xc3\xb4n\xc3\xa0liz\xc3\xa6ti\xc3\xb8n2' != 'I\xc3\x83\xc2\xb1t\xc3\x83\xc2\xabrn\xc3\x83\xc2\xa2ti\xc3\x83\xc2\xb4n\xc3\x83\xc2\xa0liz\xc3\x83\xc2\xa6ti\xc3\x83\xc2\xb8n2'

[oppianmatt]

Going to 1.57 from 1.54 caused a bunch of UnicodeDecodeError errors so we had to revert.

[digitalfox]

I confirm the issue (python 2.7). I store unicode object and get back encoded str. I had to revert as well to 1.53.

[andreymal]

Still not fixed? 🙈