FreeBSD-main-amd64-test - Build #24873 - Still Unstable

FreeBSD-main-amd64-test - Build #24873 (aeff15b392e68f5f193fff3bb01728b965cacc3a) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24873/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24873/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24873/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)

9398a495eb305d5bf240bc998ee2f6128d75f4ca by imp:
loader: Add loader.exit

84329908c522b428e4dc858a9bac769117927cd3 by manu:
pam_xdg: Remove leftover debug printf

2d2950c889335b24af7a92f3aaf9946de47bb0bc by manu:
pam_xdg: Check asprintf return value

5acbe6d1fb552eeaf44955c2780f2e9d4a70cad3 by manu:
pam_xdg: Reset rv to 0

1df8700aa6cff7c759e90f7e507de4b8714435a4 by olce:
PP mutexes: unlock: Reset inherited prio regardless of privileges

9ac3ac9ece6269365ac314fa5fdb484e96d4a32e by olce:
PP mutexes: lock: Check if priority is too high against base one

39e4665c9694b9f9b07d1cfa85befc288cabe906 by olce:
PP mutexes: lock: Reduce 'umtx_lock' holding before taking the user lock

aeff15b392e68f5f193fff3bb01728b965cacc3a by olce:
sched: Simplify sched_lend_user_prio_cond()



The failed test cases:

3 tests failed.
FAILED:  sys.kern.ptrace_test.ptrace__follow_fork_child_detached_unrelated_debugger

Error Message:
/usr/src/tests/sys/kern/ptrace_test.c:591: WIFSTOPPED(status) not met

FAILED:  sys.netinet6.test_ip6_output.py.TestIP6Output::test_output6_pktinfo[ifsame]

Error Message:
/usr/local/lib/python3.9/multiprocessing/connection.py:383: EOFError

FAILED:  sys.netpfil.common.dummynet.pf_pls_gilbert

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