When using the with statement(vb), two errors were found

Hello。

This is the code for testing：

Dim abcd As String
With abcd
	With .Substring(2)
		With .Substring(2)
		End With 
	End With 
End With 

Now, hover the mouse on the second  Substring , after a while, a StackOverflowException raised.

In fact, there is no way to enter this code normally, because when you enter the second Substring and then enter "(",  the program will crash and exit immediately