target  : (3,0x31) IStStrCopy
status  : emitted
from    : discovery snippet 'darg_optional_typed' (minimised)

' ---- modProbe.bas
Option Explicit

Public Sub Main()
  
End Sub

Sub P(Optional x As Long = 3, Optional s As String = "a")
  Dim n As Long, t As String
  n = x
  x = 1
  t = s
  s = "b"
End Sub

target disasm lines:
  modProbe.Proc_4014A4 | 4014BB    FD31 1000             IStStrCopy arg_10
