FreeBSD-main-amd64-test - Build #27547 - Still Unstable

FreeBSD-main-amd64-test - Build #27547 (1c8dafe618878c563c3740061f83a85b0be10720) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27547/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27547/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27547/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)

684c762485d31d769b9e1ebeaababa31f684d2de by markj:
git-arc: Try to make patching more useful

1c8dafe618878c563c3740061f83a85b0be10720 by markj:
git-arc: Try to improve documentation



The failed test cases:

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

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

FAILED:  usr.bin.tar.functional_test.test_option_s

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