FreeBSD-main-amd64-test - Build #27108 - Still Unstable

FreeBSD-main-amd64-test - Build #27108 (b9f848ecbafce4e56ba9c8b7993b85347e83484a) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27108/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27108/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27108/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)

bd27bd1f51d049538cc7a0053be9d99110a53ae1 by dim:
Revert "Merge commit e24f90190c77 from llvm git (by Brad Smith):"

db25448ab9ffa8bfe52d852674cc466494b849d1 by 0mp:
dtrace_io.4: Use bio_length instead of bio_bcount in examples

b9f848ecbafce4e56ba9c8b7993b85347e83484a by des:
truss: Properly display first argument to nmount



The failed test cases:

1 tests failed.
FAILED:  sys.net.if_tun_test.transient

Error Message:
Test case body timed out