FreeBSD-stable-15-amd64-test - Build #1151 - Still Unstable

FreeBSD-stable-15-amd64-test - Build #1151 (c97799277650647b5a8c2345ca11a842e0e02e10) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/1151/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/1151/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-stable-15-amd64-test/1151/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)

b1aea70753bca974af6b8e4814aecd1aaff29e2a by christos:
cuse: Fix hang on readv(2) and writev(2) with multiple iovecs

4772247a4f7448471ce8509d5aafedb0959e8239 by christos:
cuse: Actually use cuse_modevent()

598eb6719091ff35af17c6de6347d0f17136a4d1 by christos:
cuse: Create /dev/cuse with MAKEDEV_CHECKNAME

ba847a03d60743086646ac462049cd1e48fb24e1 by christos:
cuse: Improve server cleanup

8b462fa2d3e7148ff81b85b8fc4b414ebd8e9fdd by christos:
cuse: Remove unnecessary semicolon in cuse_convert_error()

f9669d9986a193da4e2dbab88d36f0dc220ab6e7 by christos:
cuse: Retire unnecessary CUSE_VERSION

1c6b48130d9a7c7926ba04a91cdf9097fc6fd02d by christos:
cuse: Use make_dev_s() to create client devices

2cb963ee8d157a688892c944aa0567bfd35322b7 by christos:
cuse: Implement hot-unload

58ca5e461c6ed6f0503b979e5b59047369a18f7e by christos:
cuse: Assert the server refcount

c97799277650647b5a8c2345ca11a842e0e02e10 by christos:
cuse: Rename cuse_server_free() to cuse_server_dtor()



The failed test cases:

2 tests failed.
FAILED:  sys.net.if_wg.wg_basic_crossaf

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

FAILED:  lib.libexecinfo.sigtramp_test.test_backtrace_sigtramp

Error Message:
/usr/src/lib/libexecinfo/tests/sigtramp_test.c:30: n > 1 not met