[Mono-bugs] [Bug 591783] New: System.ArgumentOutOfRangeException when editing in RichTextBox

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http://bugzilla.novell.com/show_bug.cgi?id=591783

http://bugzilla.novell.com/show_bug.cgi?id=591783#c0


           Summary: System.ArgumentOutOfRangeException when editing in
                    RichTextBox
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.6.x
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: andreas.flucke at t-online.de
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1;
Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

Sometimes this Exception occurs when editing in a RichTextBox (with colored
text):

System.ArgumentOutOfRangeException: startIndex + length > this.length
Parameter name: length
  at System.String.Substring (Int32 startIndex, Int32 length) [0x00085] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\corlib\System\String.cs:367
  at System.Windows.Forms.LineTag.Draw (System.Drawing.Graphics dc, Color
color, Single xoff, Single y, Int32 drawStart, Int32 drawEnd, System.String
text, System.Drawing.Rectangle& measuredText, Boolean measureText) [0x00094] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\LineTag.cs:348
  at System.Windows.Forms.Document.Draw (System.Drawing.Graphics g, Rectangle
clip) [0x0057d] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\TextControl.cs:1847
  at System.Windows.Forms.TextBoxBase.Draw (System.Drawing.Graphics g,
Rectangle clippingArea) [0x0000d] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\TextBoxBase.cs:1832
  at System.Windows.Forms.TextBoxBase.OnPaintInternal
(System.Windows.Forms.PaintEventArgs pevent) [0x00000] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\TextBoxBase.cs:1819
  at System.Windows.Forms.Control.WmPaint (System.Windows.Forms.Message& m)
[0x00078] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\Control.cs:5556
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m)
[0x0016b] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\Control.cs:5316
  at System.Windows.Forms.TextBoxBase.WndProc (System.Windows.Forms.Message&
m)[0x0020c] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\TextBoxBase.cs:1627
  at System.Windows.Forms.RichTextBox.WndProc (System.Windows.Forms.Message&
m)[0x00000] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\RichTextBox.cs:1258
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage
(System.Windows.Forms.Message& m) [0x00000] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\Control.cs:234
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc
(System.Windows.Forms.Message& m) [0x00000] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\Control.cs:215
  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr
wParam, IntPtr lParam) [0x00085] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.6.3\mcs\class\Managed.Windows.Forms\System.Windows.Forms\NativeWindow.cs:242


Reproducible: Sometimes

Steps to Reproduce:
1.
2.
3.

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