[Mono-bugs] [Bug 502567] New: NullReferenceException: Object reference not set to an instance of an obj ect at System.Windows.Forms.TreeNode.set_Checked (Boolean value) [0x00066]

[bugzilla_noreply at novell.com]

http://bugzilla.novell.com/show_bug.cgi?id=502567


           Summary: NullReferenceException: Object reference not set to an
                    instance of an obj ect   at
                    System.Windows.Forms.TreeNode.set_Checked (Boolean
                    value) [0x00066]
    Classification: Mono
           Product: Mono: Runtime
           Version: 2.4.x
          Platform: i686
        OS/Version: Windows XP
            Status: NEW
          Severity: Critical
          Priority: P5 - None
         Component: JIT
        AssignedTo: lupus at novell.com
        ReportedBy: jhmgbl2 at t-online.de
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.0.5)
Gecko/2008120122 Firefox/3.0.5 (.NET CLR 3.5.30729)

frmMain.initTreeview oldkeyensurevisible
frmMain.tvMed_AfterExpand Start
frmMain.tvMed_AfterExpand Expand Data
Source=G:\Repetit.Net.T.SQLITE\bin\Datenba
nk\RepLite.sqlite;Version=3;
Init Treeview lasted: 0,150000000001455 Seconds!
frmMain.tvMed_BeforeSelect Start
frmMain.Form_Activate Start
frmSymptome AutoSelect InitTreeview frmMain BySQL finished
frmSymptome AutoSelect finished
frmSymptome.tvSympt_AfterCheck Finished
System.NullReferenceException: Object reference not set to an instance of an
obj
ect
  at System.Windows.Forms.TreeNode.set_Checked (Boolean value) [0x00066] in
C:\c
ygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows.Forms\System.
Windows.Forms\TreeNode.cs:319
  at (wrapper remoting-invoke-with-check)
System.Windows.Forms.TreeNode:set_Chec
ked (bool)
  at System.Windows.Forms.TreeView.MouseDownHandler (System.Object sender,
Syste
m.Windows.Forms.MouseEventArgs e) [0x0009a] in
C:\cygwin\tmp\monobuild\build\BUI
LD\mono-2.4\mcs\class\Managed.Windows.Forms\System.Windows.Forms\TreeView.cs:210
1
  at (wrapper delegate-invoke)
System.Windows.Forms.MouseEventHandler:invoke_voi
d__this___object_MouseEventArgs (object,System.Windows.Forms.MouseEventArgs)
  at System.Windows.Forms.Control.OnMouseDown
(System.Windows.Forms.MouseEventAr
gs e) [0x0001c] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Manage
d.Windows.Forms\System.Windows.Forms\Control.cs:6354
  at System.Windows.Forms.Control.WmLButtonDown (System.Windows.Forms.Message&
m
) [0x0004f] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Wi
ndows.Forms\System.Windows.Forms\Control.cs:5620
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m)
[0x0
0184] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows.
Forms\System.Windows.Forms\Control.cs:5337
  at System.Windows.Forms.TreeView.WndProc (System.Windows.Forms.Message& m)
[0x
0006b] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows
Forms\System.Windows.Forms\TreeView.cs:1198
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage
(System.Windows.
Forms.Message& m) [0x00000] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\
class\Managed.Windows.Forms\System.Windows.Forms\Control.cs:234
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc
(System.Windows.Fo
rms.Message& m) [0x00000] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\cl
ass\Managed.Windows.Forms\System.Windows.Forms\Control.cs:215
  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr
wPa
ram, IntPtr lParam) [0x00085] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mc
s\class\Managed.Windows.Forms\System.Windows.Forms\NativeWindow.cs:242

Reproducible: Always

Steps to Reproduce:
1.Download and install
https://sourceforge.net/project/downloading.php?group_id=257087&filename=Repetit.Net.T.Mono_0_7_6_21.tar.gz&a=59698444
2. Select Windows: symptoms
3. Check Query: On and Query:automatic Selection: Wide
4. Check a node in the treeview
Actual Results:  
Program crashes

Expected Results:  
the two treeviews display selected results

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