FreeBSD-main-amd64-test - Build #25779 - Still Unstable

FreeBSD-main-amd64-test - Build #25779 (60f87c736807bd2b5a3ebe451add868232facf43) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25779/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25779/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25779/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)

0fc7bdc978366abb4351b0b76b50a5848cc5d982 by rscheff:
tcp: extend the use of the th_flags accessor function

347dd0539f3a75fdf2128dd4620ca99e96f311e9 by rscheff:
tcp: add TH_AE capabilities to ppp and pf

b165e9e3ea4e327fc421d81c2a89242bd8720780 by trasz:
Add fchroot(2)

60f87c736807bd2b5a3ebe451add868232facf43 by trasz:
Regen



The failed test cases:

2 tests failed.
FAILED:  sys.netinet6.ndp.ndp_slaac_default_route

Error Message:
atf-check failed; see the output of the test for details

FAILED:  sys.net.routing.test_routing_l3.py.TestIfOps::test_change_prefix_route[inet]

Error Message:
/usr/tests/sys/net/routing/test_routing_l3.py:42: AssertionError