after an almost empty perl6 program, these vm arrays are still in use

gistfile1.txt

      2 2: vma sz 1024 use 823 type 2
      2 2: vma sz 123 use 123 type 0
      2 2: vma sz 155 use 155 type 0
      2 2: vma sz 16 use 10 type 1
      2 2: vma sz 16 use 10 type 2
      2 2: vma sz 16 use 11 type 0
      2 2: vma sz 32 use 18 type 0
      2 2: vma sz 32 use 32 type 0
      2 2: vma sz 34 use 34 type 0
      2 2: vma sz 35 use 35 type 0
      2 2: vma sz 37 use 37 type 0
      2 2: vma sz 38 use 38 type 0
      2 2: vma sz 40 use 40 type 0
      2 2: vma sz 459 use 459 type 0
      2 2: vma sz 47 use 47 type 0
      2 2: vma sz 51 use 51 type 0
      2 2: vma sz 53 use 53 type 0
      2 2: vma sz 57 use 57 type 0
      2 2: vma sz 8 use 7 type 0
      2 2: vma sz 8 use 8 type 1
      2 2: vma sz 8 use 8 type 2
      3 2: vma sz 16 use 9 type 0
      3 2: vma sz 26 use 26 type 0
      3 2: vma sz 29 use 29 type 0
      3 2: vma sz 55 use 55 type 0
      3 2: vma sz 56 use 56 type 0
      3 2: vma sz 60 use 60 type 0
      3 2: vma sz 66 use 66 type 0
      4 2: vma sz 33 use 33 type 0
      4 2: vma sz 44 use 44 type 0
      4 2: vma sz 72 use 72 type 0
      5 2: vma sz 16 use 9 type 1
      5 2: vma sz 23 use 23 type 0
      5 2: vma sz 32 use 22 type 0
      5 2: vma sz 8 use 0 type 0
      6 2: vma sz 16 use 9 type 2
      6 2: vma sz 20 use 20 type 0
      6 2: vma sz 22 use 22 type 0
      6 2: vma sz 25 use 25 type 0
      6 2: vma sz 36 use 36 type 0
      6 2: vma sz 8 use 5 type 0
      6 2: vma sz 8 use 6 type 0
      6 2: vma sz 8 use 6 type 1
      6 2: vma sz 8 use 6 type 2
      7 2: vma sz 117 use 117 type 0
      7 2: vma sz 28 use 28 type 0
      7 2: vma sz 31 use 31 type 0
      7 2: vma sz 58 use 58 type 0
      7 2: vma sz 8 use 7 type 1
      8 2: vma sz 39 use 39 type 0
      8 2: vma sz 8 use 7 type 2
      8 2: vma sz 90 use 90 type 0
     10 2: vma sz 17 use 17 type 0
     10 2: vma sz 69 use 69 type 0
     13 2: vma sz 19 use 19 type 0
     15 2: vma sz 16 use 16 type 0
     15 2: vma sz 8 use 5 type 1
     15 2: vma sz 8 use 5 type 2
     19 2: vma sz 8 use 4 type 1
     19 2: vma sz 8 use 4 type 2
     27 2: vma sz 11 use 11 type 0
     30 2: vma sz 13 use 13 type 0
     30 2: vma sz 8 use 4 type 0
     31 2: vma sz 27 use 27 type 0
     33 2: vma sz 8 use 3 type 0
     34 2: vma sz 63 use 63 type 0
     35 2: vma sz 14 use 14 type 0
     42 2: vma sz 8 use 3 type 1
     45 2: vma sz 10 use 10 type 0
     45 2: vma sz 8 use 3 type 2
     64 2: vma sz 81 use 81 type 0
     91 2: vma sz 8 use 8 type 0
    120 2: vma sz 30 use 30 type 0
    120 2: vma sz 7 use 7 type 0
    164 2: vma sz 8 use 1 type 0
    179 2: vma sz 24 use 24 type 0
    211 2: vma sz 18 use 18 type 0
    231 2: vma sz 15 use 15 type 0
    249 2: vma sz 0 use 0 type 1
    303 2: vma sz 8 use 2 type 0
    339 2: vma sz 8 use 2 type 1
    364 2: vma sz 5 use 5 type 0
    492 2: vma sz 8 use 1 type 2
    548 2: vma sz 45 use 45 type 0
    550 2: vma sz 8 use 1 type 1
    582 2: vma sz 21 use 21 type 0
    610 2: vma sz 12 use 12 type 0
    771 2: vma sz 8 use 2 type 2
    834 2: vma sz 4 use 4 type 0
   1680 2: vma sz 1 use 1 type 0
   2341 2: vma sz 0 use 0 type 2
   3585 2: vma sz 0 use 0 type 0
   3879 2: vma sz 2 use 2 type 0
   7050 2: vma sz 9 use 9 type 0
  11756 2: vma sz 6 use 6 type 0
  51092 2: vma sz 3 use 3 type 0