FreeBSD-main-amd64-test - Build #23770 - Still Unstable

FreeBSD-main-amd64-test - Build #23770 (a681cba16d8967651a2146385ce44a2bfeb1c4c3) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/23770/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/23770/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/23770/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)

e3b557809604d036af6e00c60f012c2025b59a5e by dim:
Vendor import of llvm-project main llvmorg-16-init-18548-gb0daacf58f41,

11edbfca22fe6e8280caeb77832f4dfbb68ed274 by dim:
Vendor import of llvm-project branch release/16.x

11ee15ea4ee1ea5555f8d7ba1ec5ffe956df2a8c by dim:
Vendor import of llvm-project branch release/16.x

5bcd187b307a70f29854eb0c5ccdf30ff3770fe1 by dim:
Vendor import of llvm-project branch release/16.x

8a37c71e9d8855c91b9ef296ed389248f960bb52 by dim:
Vendor import of llvm-project branch release/16.x

86321b98854d834e516cc65ddd09ef53e930fc4c by dim:
Vendor import of llvm-project branch release/16.x

727e049ae5985f129320069542bb57add1ba6096 by dim:
Vendor import of llvm-project branch release/16.x

791701a7dc6225242c41502cb3ed6874623c1785 by dim:
Vendor import of llvm-project branch release/16.x

3b922bd9516f6dc5146815ed8d4363fcbe97997f by dim:
Vendor import of llvm-project branch release/16.x

23e196feed9f559d4ae1fcf003c6360196309a19 by dim:
Vendor import of llvm-project branch release/16.x

482e0fcdf745981f2c2b12311405fe93563cefc4 by dim:
Merge commit 16949c5c48ab from llvm-project (by Dimitry Andric):

1ac57eed95099f4d9da2ecab6000ad66d05c1018 by dim:
Merge commit db492316399a from llvm-project (by Dimitry Andric):

c3450ad127e94d3fa67ae337310e59c002f51bfc by dim:
clang: re-downgrade implicit int/function declarations to warning only

cf24393421ca807899c599a53ddc5dcedb7c71dc by dim:
Merge commit 69d42eef4bec from llvm-project (by Dimitry Andric):

a681cba16d8967651a2146385ce44a2bfeb1c4c3 by dim:
Bump __FreeBSD_version for llvm 16.0.6 merge



The failed test cases:

2 tests failed.
FAILED:  sys.fs.fusefs.mknod.main

Error Message:
Returned non-success exit status 1

FAILED:  sys.netinet6.frag6.frag6_19.frag6_19

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