Without this, I get:
02025-09-19T03:14:05.157000Z TestFramework (INFO): PRNG seed is: 3218602557639511064
12025-09-19T03:14:05.158000Z TestFramework (INFO): Initializing test directory /tmp/bitcoin-test/a
22025-09-19T03:14:05.158000Z TestFramework (INFO): Check for ipv6
32025-09-19T03:14:05.158000Z TestFramework (INFO): Check for non-loopback interface
42025-09-19T03:14:05.158000Z TestFramework (INFO): Bind test for []
52025-09-19T03:14:05.516000Z TestFramework (INFO): Bind test for []
62025-09-19T03:14:05.871000Z TestFramework (INFO): Bind test for ['[::1]']
72025-09-19T03:14:06.227000Z TestFramework (INFO): Bind test for ['127.0.0.1', '[::1]']
82025-09-19T03:14:06.583000Z TestFramework (INFO): Using interface None for testing
92025-09-19T03:14:06.583000Z TestFramework (INFO): Bind test for [None]
102025-09-19T03:14:06.583000Z TestFramework (ERROR): Unexpected exception
11Traceback (most recent call last):
12 File "/Bitcoin/bitcoin/workingtree/test/functional/test_framework/test_framework.py", line 135, in main
13 self.run_test()
14 ~~~~~~~~~~~~~^^
15 File "/Bitcoin/bitcoin/workingtree/test/functional/rpc_bind.py", line 126, in run_test
16 self._run_nonloopback_tests()
17 ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
18 File "/Bitcoin/bitcoin/workingtree/test/functional/rpc_bind.py", line 157, in _run_nonloopback_tests
19 self.run_bind_test([self.non_loopback_ip], self.non_loopback_ip, [self.non_loopback_ip],
20 ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
21 [(self.non_loopback_ip, self.defaultport)])
22 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
23 File "/Bitcoin/bitcoin/workingtree/test/functional/rpc_bind.py", line 38, in run_bind_test
24 expected = [(addr_to_hex(addr), port) for (addr, port) in expected]
25 ~~~~~~~~~~~^^^^^^
26 File "/Bitcoin/bitcoin/workingtree/test/functional/test_framework/netutil.py", line 132, in addr_to_hex
27 if '.' in addr: # IPv4
28 ^^^^^^^^^^^
29TypeError: argument of type 'NoneType' is not iterable