remove a optimization that resulted in unexpected behavior #8929
diff --git a/Lib/test/test_select.py b/Lib/test/test_select.py
index fd7c8d0..647d71e 100644
--- a/Lib/test/test_select.py
+++ b/Lib/test/test_select.py
@@ -21,6 +21,13 @@
self.assertRaises(TypeError, select.select, [self.Almost()], [], [])
self.assertRaises(TypeError, select.select, [], [], [], "not a number")
+ def test_returned_list_identity(self):
+ # See issue #8329
+ r, w, x = select.select([], [], [], 1)
+ self.assertIsNot(r, w)
+ self.assertIsNot(r, x)
+ self.assertIsNot(w, x)
+
def test_select(self):
cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done'
p = os.popen(cmd, 'r')