FreeBSD-main-amd64-test - Build #27389 - Still Unstable

FreeBSD-main-amd64-test - Build #27389 (fc88be257e30c3e3c01f25ec3a3a6e7933b40c54) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27389/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27389/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27389/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)

fc88be257e30c3e3c01f25ec3a3a6e7933b40c54 by fuz:
Revert "stddef.h: add unreachable() for C23 compliance"



The failed test cases:

2 tests failed.
FAILED:  lib.libc.gen.limits_test.__test_cases_list__

Error Message:
No test cases

FAILED:  usr.bin.tar.functional_test.test_option_s

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