[Mono-bugs] [Bug 79568][Nor] New - NRE in ToolTip.control_MouseEnter

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Changed by sebastien at ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=79568

--- shadow/79568	2006-10-03 10:56:40.000000000 -0400
+++ shadow/79568.tmp.19778	2006-10-03 10:56:40.000000000 -0400
@@ -0,0 +1,41 @@
+Bug#: 79568
+Product: Mono: Class Libraries
+Version: 1.1
+OS: All
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: Windows.Forms
+AssignedTo: toshok at ximian.com                            
+ReportedBy: sebastien at ximian.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: NRE in ToolTip.control_MouseEnter
+
+Description of Problem:
+A NullReferenceException can occur if the sender.GetContainerControl
+returns null.
+
+Steps to reproduce the problem:
+1. hard to replicate
+
+Actual Results:
+Unhandled Exception: System.NullReferenceException: Object reference not
+set to an instance of an object
+  at System.Windows.Forms.ToolTip.control_MouseEnter (System.Object sender,
+System.EventArgs e) [0x00000]
+  at (wrapper delegate-invoke)
+System.MulticastDelegate:invoke_void_object_EventArgs (object,System.EventArgs)
+  at System.Windows.Forms.Control.OnMouseEnter (System.EventArgs e) [0x00000]
+
+Expected Results:
+No exception.
+
+How often does this happen? 
+Rarely - hard to replicate.
+
+Additional Information: