FreeBSD-main-amd64-test - Build #25773 - Still Unstable

FreeBSD-main-amd64-test - Build #25773 (06a98fefd3d3ff42b7e7832af6c0736b98f167ac) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25773/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25773/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25773/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)

06a98fefd3d3ff42b7e7832af6c0736b98f167ac by brooks:
nvi: Replace Clang-only __builtin_is_aligned with C code (#124)



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