Bug? SFtp (jsch library): if method called without initialising, the method doesn't throw an exception

[walt61]

See title - this caught me off guard; I'd expect an exception to be thrown?

Sub Process_Globals
End Sub

Sub AppStart (Args() As String)
    Dim sftp1 As SFtp ' Not initialised
    Log("Before")
    sftp1.List("A/B/C")
    Log("After")
End Sub