target  : (0,0x27) LitVar_Missing
status  : emitted
from    : discovery snippet 'lit_missing' (minimised)

' ---- modProbe.bas
Option Explicit

Public Sub Main()
  Opt
End Sub

Sub Opt(Optional v As Variant)
End Sub

target disasm lines:
  modProbe.Sub Main | 401494    27 5CFF               LitVar_Missing var_A4
