SV = PV(0x22612c) at 0x22606c
  REFCNT = 1
  FLAGS = (PADBUSY,PADMY,POK,pPOK)
  PV = 0x22f4d4 "abc"\0
  CUR = 3
  LEN = 4
SV = PV(0x22612c) at 0x22606c       Could be coincidence, but isn't.
  REFCNT = 1                          The SV wasn't freed.
  FLAGS = (PADBUSY,PADMY,POK,pPOK)
  PV = 0x182cadc "defghijkl"\0      New larger (LEN=12) str buf.
  CUR = 9
  LEN = 12
SV = PV(0x22612c) at 0x22606c
  REFCNT = 1
  FLAGS = (PADBUSY,PADMY,POK,pPOK)
  PV = 0x182cadc "mno"\0            Same "large" (LEN=12) buf reused.
  CUR = 3
  LEN = 12
SV = PV(0x22612c) at 0x22606c
  REFCNT = 1
  FLAGS = (PADBUSY,PADMY)           Undefined
  PV = 0x182cadc "mno"\0            Str buf untouched.
  CUR = 3
  LEN = 12
SV = PV(0x22612c) at 0x22606c
  REFCNT = 1
  FLAGS = (PADBUSY,PADMY)           Undefined
  PV = 0                            Str buf freed.
SV = PV(0x22612c) at 0x22606c
  REFCNT = 1
  FLAGS = (PADBUSY,PADMY,POK,pPOK)
  PV = 0x22f4d4 "pqr"\0             New small (LEN=4) str buf.
  CUR = 3                             Same address as earlier
  LEN = 4                             is a coincidence.