DB<318> $code = sub { my $a ** $b ** $bla::c }

  DB<319> x peek_sub($code)
0  HASH(0x3d161a8)
   '$a' => SCALAR(0x3d18da0)
      -> undef
  DB<320>

##</code><code>##

D:\>perl -MO=Concise,bla -e "sub bla {@a = ($b, my $c)}"
main::bla:
9  <1> leavesub[1 ref] K/REFC,1 ->(end)
-     <@> lineseq KP ->9
1        <;> nextstate(main 2 -e:1) v ->2
8        <2> aassign[t5] KS/COM_AGG ->9
-           <1> ex-list lKP ->5
2              <0> pushmark s ->3
-              <1> ex-rv2sv sK/1 ->4
3                 <#> gvsv[*b] s ->4                  #<-- $::b
4              <0> padsv[$c:2,3] sM/LVINTRO ->5       #<-- my $c
-           <1> ex-list lK ->8
5              <0> pushmark s ->6
7              <1> rv2av[t2] lKRM*/1 ->8
6                 <#> gv[*a] s ->7                    #<-- @::a
-e syntax OK