The s_flag and v_flag tests have been flapping on Jenkins for some time now. They should be skipped or removed if the root-cause can't be found quickly since flapping tests reduces confidence in the tests being useful and generates unnecessary noise.
A commit references this bug: Author: kevans Date: Wed Oct 4 18:11:01 UTC 2017 New revision: 324286 URL: https://svnweb.freebsd.org/changeset/base/324286 Log: hexdump: Remove expected test failures for now succeeding tests r323990 fixed the -s flag breakage reported by PR 219173. Mark the corresponding hexdump tests accordingly, since they should now both succeed. PR: 222781 Reported by: ngie Reviewed by: emaste, ngie Approved by: emaste (mentor) Differential Revision: https://reviews.freebsd.org/D12590 Changes: head/usr.bin/hexdump/tests/hexdump_test.sh
A commit references this bug: Author: kevans Date: Sat Jan 27 06:31:14 UTC 2018 New revision: 328463 URL: https://svnweb.freebsd.org/changeset/base/328463 Log: MFC r320930,r324286: Add tests for hexdump(1) MFC r320930: Add some basic tests for hexdump(1)'s various output flags. Formatting tests are omitted for this initial run as there are still some bugs to work out there. This covers -s flag testing on devices and non-devices that would have caught breakage found in PR 219173 as well as other subtle breakage caused locally. MFC r324286: hexdump: Remove expected test failures for now succeeding tests r323990 fixed the -s flag breakage reported by PR 219173. Mark the corresponding hexdump tests accordingly, since they should now both succeed. PR: 222781 Changes: _U stable/11/ stable/11/etc/mtree/BSD.tests.dist stable/11/usr.bin/hexdump/Makefile stable/11/usr.bin/hexdump/tests/ stable/11/usr.bin/hexdump/tests/hexdump_test.sh