perl -MDevel::Peek -e'$x=42; "$x"; $y = $x; Dump $y'
SV = PVIV(0x814e9a8) at 0x814d518
  REFCNT = 1
  FLAGS = (IOK,POK,pIOK,pPOK)
  IV = 42
  PV = 0x8168e70 "42"\0
  CUR = 2
  LEN = 4