Bug? Stackbuffer grows up extremely

#Region Project Attributes
    #AutoFlushLogs: True
    #CheckArrayBounds: True
    #StackBufferSize: 3100
#End Region

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'Public variables can be accessed from all modules.
    Public Serial1 As Serial
End Sub

Private Sub AppStart
    Serial1.Initialize(115200)
    Log("AppStart")
    For t = 1 To 256
        Log (Asc(t))
        Log("stack :",StackBufferUsage)
        
        Delay (100)
    Next
End Sub

Private Sub AppStart
   Serial1.Initialize(115200)
   Log("AppStart")
   Dim b(1) As Byte
   For t = 1 To 256
       b(0) = t
       Log(b)
       Log("stack :",StackBufferUsage)
       Delay (100)
   Next
End Sub