perl -MO=Concise,-exec -e 'my ($l) = <$fh>'

1  <0> enter
2  <;> nextstate(main 1 -e:1) v
3  <0> pushmark s
4  <#> gvsv[*fh] s
5  <1> readline[t3] lK*/1
6  <0> pushmark s
7  <0> padsv[$l:1,2] lPRM*/LVINTRO
8  <2> aassign[t4] vKS
9  <@> leave[1 ref] vKP/REFC

perl -MOpcode  -le 'print Opcode::opdesc("aassign")'
list assignment