what does rakudo's deserialization do when you perl6 -e ''?

gistfile1.txt

    539 deserializing object for MultiToIncorporate
    543     21 slots, 8 ssize
    551   demanding string 1549
    571   demanding string 1540
    591   demanding string 3244
    591 deserializing object for Block
    604   demanding string 2135
    636   demanding string 1529
    636 deserializing object for QAST::WVal
    734   demanding string 1520
    792   demanding string 3026
    800   demanding string 4725
    800   demanding string 8325
    800   demanding string 8326
    800   demanding string 8327
    800   demanding string 8328
    800   demanding string 8329
    800   demanding string 8330
    802   demanding string 1201
    806 deserializing object for NQPRegex
    834   demanding string 224
    836 deserializing object for QAST::Op
    921     4 slots, 8 ssize
   1011   demanding string 0
   1029 deserializing object for Stash
   1074   demanding string 494
   1155 deserializing object for Sub
   1325 <<<<< work_loop
   1325 work_loop >>>>
   1531   demanding string 1518
   1764 deserializing object for Method
   1808 deserializing object for Scalar
   1843   demanding string 210
   1907 deserializing object for NQPRoutine
   2447     1 slots, 8 ssize
   2501   demanding string 3010
   2944     0 slots, 8 ssize
   3378 deserializing object for Signature
   3608     2 slots, 8 ssize
   3896   demanding string 1524
   5193     9 slots, 8 ssize
   5665 deserializing object for Perl6::Metamodel::ContainerDescriptor
   6869 deserializing object for Parameter
  10562     6 slots, 8 ssize
  41358     3 slots, 8 ssize
  70158 deserializing object for NQPArray