>perl -MO=Concise -e "print qq{Hello, world!\n};"
6  <@> leave[t1] vKP/REFC ->(end)
1     <0> enter ->2
2     <;> nextstate(main 5 -e:1) v ->3
5     <@> print vK ->6
3        <0> pushmark s ->4
4        <$> const(SPECIAL Null)[t2] s ->5
-e syntax OK