FreeBSD-main-amd64-test - Build #25814 - Still Unstable

FreeBSD-main-amd64-test - Build #25814 (c77c488926555ca344ae3a417544cf7a720e1de1) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25814/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25814/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25814/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)

7277ee24655bd9190ee1131666aebf6ed9d12390 by delphij:
Vendor import of expat 2.6.4.

9114e15a86949f7d168bf09dbe78a340d5444e80 by kib:
amd64: re-enable la57, try two

8c9fd1007159a1cfe994ccf7021688a679a0a39c by delphij:
Vendor import of less v668.



The failed test cases:

2 tests failed.
FAILED:  sys.kern.sigwait.test_wait_dequeue_sigchld_true

Error Message:
/usr/src/tests/sys/kern/sigwait.c:403: -1 != sig: sigwaitinfo() should fail, sig 20 != -1

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