FreeBSD-main-amd64-test - Build #24989 - Still Unstable

FreeBSD-main-amd64-test - Build #24989 (579cb41b132f532bf4915121c0d0b2f43688242e) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24989/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24989/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24989/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)

579cb41b132f532bf4915121c0d0b2f43688242e by zlei:
acpi_hpet: Make use of enum for vm_guest to improve readability



The failed test cases:

2 tests failed.
FAILED:  sys.fs.tmpfs.times_test.empty

Error Message:
Test case was expecting a failure but none were raised

FAILED:  cddl.usr.sbin.zfsd.zfsd_unittest.main

Error Message:
Received signal 6