FreeBSD-stable-15-amd64-test - Build #420 - Still Unstable

FreeBSD-stable-15-amd64-test - Build #420 (9f90e5a3ce9d4adc0cb02ebde832a8fd51f0a6bb) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/420/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/420/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/420/console

Status explanation:
"Unstable" - some tests are suspected being broken by the following changes
"Still Unstable" - the failing test cases have not been fixed by these
                   following changes and this is a notification to note that
                   these changes have not been fully tested by the CI system

Change summaries:
(Those commits are likely but not certainly responsible)

27bf077ab3a5487b20a1104e2584873898b2c9e7 by jlduran:
gdb: Add missing mtree debug entry

9f90e5a3ce9d4adc0cb02ebde832a8fd51f0a6bb by jlduran:
libexecinfo: tests: Expect failure on aarch64



The failed test cases:

2 tests failed.
FAILED:  sys.netpfil.pf.nat.endpoint_independent_compat

Error Message:
server1 did not receive connection from client (default)

FAILED:  sys.netlink.test_netlink_message_writer.py.__test_cases_list__

Error Message:
Test program did not exit cleanly