FreeBSD-main-amd64-test - Build #24868 - Still Unstable

FreeBSD-main-amd64-test - Build #24868 (1b3f4ccb7dd8600d010fc6a09b09ee7d74872809) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24868/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24868/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24868/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)

1b3f4ccb7dd8600d010fc6a09b09ee7d74872809 by tsoome:
loader: we can only env_discard() existing variable



The failed test cases:

1 tests failed.
FAILED:  sys.netinet6.proxy_ndp.pndp_neighbor_advert

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