FreeBSD-main-amd64-test - Build #25876 - Still Unstable

FreeBSD-main-amd64-test - Build #25876 (9f78c837d94f73f1485e2ce012a8e64197dae9d5) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25876/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25876/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25876/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)

3282e368e00460de500e5cfcf1c33b597199aaf8 by kib:
thr_cancel.c: style

e32308efa215868d98036c30f73c98ebf67e03d4 by kib:
thr_sig.c: style

86f6ff9ff00e2ba4d4cd5b7a94d57b1c3f85ff98 by kib:
libthr: move dlerror_msg into zeroed part of struct thread

a944e6d5c0c27c2a533486062497a40d8f0ae543 by kib:
thr_cancel.c: use testcancel() instead of manually expanding it

030f48f78f96e0cdb30c960e1a11e5ae01d0eee8 by kib:
pthread_setcancelstate(3): make it async-signal-safe

9f78c837d94f73f1485e2ce012a8e64197dae9d5 by kib:
check_cancel: when in_sigsuspend, send SIGCANCEL unconditionally



The failed test cases:

4 tests failed.
FAILED:  lib.csu.dynamiclib.cxx_constructors.__test_cases_list__

Error Message:
Test program did not exit cleanly

FAILED:  lib.csu.dynamiclib.fini_test.__test_cases_list__

Error Message:
Test program did not exit cleanly

FAILED:  lib.csu.dynamiclib.init_test.__test_cases_list__

Error Message:
Test program did not exit cleanly

FAILED:  sys.net.routing.test_routing_l3.py.TestIfOps::test_change_prefix_route[inet]

Error Message:
/usr/tests/sys/net/routing/test_routing_l3.py:42: AssertionError