Test suite failures

Running TS against the clang AVX512BW build I made for #5488, I get these failures:

form=descrypt                     guesses: 1500 0:00:00:00 DONE  [PASSED]
.pot CHK:descrypt                 guesses: 1500 -show=1500 0:00:00:00 DONE : Expected count(s) (1500)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)
--
form=descrypt                     guesses: 1500 0:00:00:00 DONE  [PASSED]
.pot CHK:descrypt                 guesses: 1500 -show=1500 0:00:00:00 DONE : Expected count(s) (1500)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)
--
form=lm                           guesses: 3000 0:00:00:00 DONE  [PASSED]
.pot CHK:lm                       guesses: 1500 -show=3000 0:00:00:00 DONE : Expected count(s) (1500)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)
--
form=pwdump_lm                    guesses: 2760 0:00:00:00 DONE  [PASSED]
.pot CHK:pwdump_lm                guesses:  986 -show=2760 0:00:00:00 DONE : Expected count(s) (986)(646)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)
--
form=MSSql05                      guesses: 1500 0:00:00:00 DONE  [PASSED]
.pot CHK:MSSql05                  guesses: 1497 -show=1497 0:00:00:00 DONE : Expected count(s) (1500)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  0 inval-pwd)
--
form=vnc                          guesses: 1500 0:00:00:00 DONE  [PASSED]
.pot CHK:vnc                      guesses: 1500 -show=1500 0:00:00:00 DONE : Expected count(s) (1500)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)
--
form=netlm-l0phtcrack             guesses: 1351 0:00:00:01 DONE  [PASSED]
.pot CHK:netlm-l0phtcrack         guesses: 1351 -show=1351 0:00:00:00 DONE : Expected count(s) (1351)(1069)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)
--
form=pst                          guesses: 1500 0:00:00:00 DONE  [PASSED]
.pot CHK:pst                      guesses: 1500 -show=1500 0:00:00:00 DONE : Expected count(s) (1500)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)
--
form=descrypt-inc_ascii_qwk       guesses:  500 0:00:00:00 DONE  [PASSED]
.pot CHK:descrypt-inc_ascii_qwk   guesses:  500 -show= 500 0:00:00:00 DONE : Expected count(s) (500)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)
--
form=descrypt-inc_alnum_qwk       guesses:  500 0:00:00:00 DONE  [PASSED]
.pot CHK:descrypt-inc_alnum_qwk   guesses:  500 -show= 500 0:00:00:00 DONE : Expected count(s) (500)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)
--
form=sapB                         guesses: 1500 0:00:00:00 DONE  [PASSED]
.pot CHK:sapB                     guesses: 1500 -show=1500 0:00:00:00 DONE : Expected count(s) (1500)  [!!!FAILED4!!!   ret_val=0]  (0 val-pwd  1 inval-pwd)

Reproduce the TS failures using the clang AVX512BW build described in this issue and compare the failing checks with the corresponding passing runs. Trace the descrypt, lm, pwdump_lm, MSSql05, vnc, netlm-l0phtcrack, pst, and sapB test cases until the differing behavior is identified. Done means the listed test-suite checks pass.