[Mono-bugs] [Bug 77824][Wis] New - im: crash when calling PaintEventArgs.Graphics.Transform in OnPaint()

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Changed by matt at use.net.

http://bugzilla.ximian.com/show_bug.cgi?id=77824

--- shadow/77824	2006-03-17 20:14:35.000000000 -0500
+++ shadow/77824.tmp.13269	2006-03-17 20:14:35.000000000 -0500
@@ -0,0 +1,84 @@
+Bug#: 77824
+Product: Mono: Class Libraries
+Version: 1.1
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Wishlist
+Component: Windows.Forms
+AssignedTo: peter at novonyx.com                            
+ReportedBy: matt at use.net               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: im: crash when calling PaintEventArgs.Graphics.Transform in OnPaint()
+
+Description of Problem:
+in an OnPaint handler for a UserControl-derived control, I am getting a
+crash with the attached stacktrace. I can't seem to reproduce it in a small
+test app.
+
+Actual Results:
+** (<unknown>:13508): CRITICAL **: GdipGetWorldTransform: assertion
+'graphics != NULL' failed
+
+Unhandled Exception: System.ArgumentException: Invalid Parameter. A null
+reference or invalid value was found.
+in [0x00077] (at
+/home/matt/src/mono/mcs/class/System.Drawing/System.Drawing/gdipFunctions.cs:180)
+System.Drawing.GDIPlus:CheckStatus (Status status)
+in [0x00019] (at
+/home/matt/src/mono/mcs/class/System.Drawing/System.Drawing/Graphics.cs:2426)
+System.Drawing.Graphics:get_Transform ()
+in (wrapper remoting-invoke-with-check)
+System.Drawing.Graphics:get_Transform ()
+in <0x0003f> WindowsUI.Controls.Cells.CellHost:OnPaint
+(System.Windows.Forms.PaintEventArgs e)
+in [0x001dd] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:3738)
+System.Windows.Forms.Control:WndProc (System.Windows.Forms.Message m)
+in [0x00002] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/ScrollableControl.cs:508)
+System.Windows.Forms.ScrollableControl:WndProc (System.Windows.Forms.Message m)
+in [0x00002] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/ContainerControl.cs:335)
+System.Windows.Forms.ContainerControl:WndProc (System.Windows.Forms.Message m)
+in [0x00002] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/UserControl.cs:92)
+System.Windows.Forms.UserControl:WndProc (System.Windows.Forms.Message m)
+in [0x00007] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:159)
+System.Windows.Forms.Control+ControlNativeWindow:WndProc
+(System.Windows.Forms.Message m)
+in [0x00056] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/NativeWindow.cs:146)
+System.Windows.Forms.NativeWindow:WndProc (IntPtr hWnd, Msg msg, IntPtr
+wParam, IntPtr lParam)
+in [0x0001c] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUIX11.cs:2404)
+System.Windows.Forms.XplatUIX11:DispatchMessage (System.Windows.Forms.MSG msg)
+in [0x00006] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUI.cs:385)
+System.Windows.Forms.XplatUI:DispatchMessage (System.Windows.Forms.MSG msg)
+in [0x0023f] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Application.cs:395)
+System.Windows.Forms.Application:RunLoop (Boolean Modal,
+System.Windows.Forms.ApplicationContext context)
+in [0x00006] (at
+/home/matt/src/mono/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Application.cs:288)
+System.Windows.Forms.Application:Run ()
+in <0x0015a> WindowsUI.UI:Start ()
+in <0x0033d> Client.MainEntryPoint:Main (System.String[] arguments)
+
+
+
+Expected Results:
+Shouldn't crash -- it works fine on MS.NET 1.1 and 2.0.
+
+How often does this happen? 
+Every time.
+
+Additional Information: