FreeBSD-main-amd64-test - Build #24186 - Still Unstable

FreeBSD-main-amd64-test - Build #24186 (f147cf0ee2b2642c0a133a71c8a5dc018518d923) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24186/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24186/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24186/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)

f147cf0ee2b2642c0a133a71c8a5dc018518d923 by emaste:
dtc: Ensure it is built in C++17 mode



The failed test cases:

3 tests failed.
FAILED:  sys.netinet6.frag6.frag6_19.frag6_19

Error Message:
Global IPv6 statistics do not match: 19 != 20

FAILED:  usr.bin.file.file_test.contrib_file_tests

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

FAILED:  sys.fs.tmpfs.times_test.empty

Error Message:
Incorrect atime