FreeBSD-main-amd64-test - Build #19871 - Still Unstable

FreeBSD-main-amd64-test - Build #19871 (28ba36c65db8b4d95abcd543b97f2ec5161cdae5) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/19871/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/19871/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/19871/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)

093cf790569775b80662926efea6d9d3464bde94 by emaste:
makefs: remove set but not used variables

28ba36c65db8b4d95abcd543b97f2ec5161cdae5 by ygy:
bridge(4): Use American spelling of "behavior"



The failed test cases:

4 tests failed.
FAILED:  lib.libregex.exhaust_test.regcomp_too_big

Error Message:
Empty test result or no new line

FAILED:  sys.posixshm.posixshm_test.largepage_mprotect

Error Message:
/usr/src/tests/sys/posixshm/posixshm_test.c:1669: mmap(2097152 bytes) failed; error=28

FAILED:  lib.libc.sys.setrlimit_test.setrlimit_stack

Error Message:
Empty test result or no new line

FAILED:  sys.netpfil.common.dummynet.pf_nat

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