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-rw-r--r--Lib/test/test_posix.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 9408e5c..5c09ebf 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -1144,7 +1144,7 @@ class PosixGroupsTester(unittest.TestCase):
def test_initgroups(self):
# find missing group
- g = max(self.saved_groups) + 1
+ g = max(self.saved_groups or [0]) + 1
name = pwd.getpwuid(posix.getuid()).pw_name
posix.initgroups(name, g)
self.assertIn(g, posix.getgroups())