Smartmatch is experimental at t/1.t line 20.
t/1.t .. 
ok 1
ok 2
ok 3
ok 4
ok 5
[2022-05-30 14:22:43] nameserver accessible locally @ 127.0.0.1
ok 6
1..6
ok
All tests successful.
Files=1, Tests=6,  1 wallclock secs ( 0.03 usr  0.00 sys +  0.31 cusr  0.05 csys =  0.39 CPU)
Result: PASS