[Mono-bugs] [Bug 501639] New: child form sometimes does not appear on ShowDialog (about 30%)

[bugzilla_noreply at novell.com]

http://bugzilla.novell.com/show_bug.cgi?id=501639


           Summary: child form sometimes does not appear on ShowDialog
                    (about 30%)
    Classification: Mono
           Product: Mono: Class Libraries
           Version: SVN
          Platform: i686
        OS/Version: openSUSE 11.1
            Status: NEW
          Severity: Critical
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: tsai at pinnacle.com.tw
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


Created an attachment (id=290598)
 --> (http://bugzilla.novell.com/attachment.cgi?id=290598)
Bug_ShowDialog vs2005 solution source code

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.0.10)
Gecko/2009042316 Firefox/3.0.10

1. parent form inherit from Form
        private void button1_Click(object sender, EventArgs e)
        {
            ChildFm form = new ChildFm();
            form.Owner = this;
            form.Text = form.ClientSize.Width + ":" + form.ClientSize.Height +
                form.StartPosition.ToString() +
                form.Location.X + ":" + form.Location.Y +
                form.ShowInTaskbar + ":" + form.TopMost;
            //form.SetDesktopLocation(123, 123);
            form.ShowDialog();
            form.Dispose();
            form = null;
        }

2.bgForm inherit from Form
      public bgForm()
      {
          InitializeComponent();
          this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;
      }

3. child form inherit from bgForm
      public ChildFm()
      {
          InitializeComponent();

          this.ControlBox = false;
          this.FormBorderStyle = FormBorderStyle.None;
          this.Location = new Point(200, 200);
          this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;
      }

Reproducible: Sometimes

Steps to Reproduce:
1.open openSUSE -> GNOME Terminal
2.cd /home/test/Desktop
3.mono Bug_ShowDialog.exe (mono -V   svn version 2.5 r132544 2009/04/24)
4.click ChildForm button (sometimes ChildForm does not appear, program CRASH)
5.click ChildForm close button
Actual Results:  
sometimes ChildForm does not appear (30%), program CRASH
muse press Ctrl+C to close program in GNOME Terminal

Expected Results:  
ChildForm must appear always

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