http://bugzilla.novell.com/show_bug.cgi?id=494639
Summary: ContextMenuStrip/ToolStripMenuItem crashes when
pressing ESC.
Classification: Mono
Product: Mono: Class Libraries
Version: 2.4.x
Platform: x86
OS/Version: Windows Vista
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Windows.Forms
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
Found By: Development
Created an attachment (id=285555)
--> (http://bugzilla.novell.com/attachment.cgi?id=285555)
Minimal case to reproduce the problem
Description of Problem:
When opening an ContextMenuStrip with a ToolStripMenuItem and then pressing ESC
the runtime throws an unhandled exception.
Steps to reproduce the problem:
1. Start the attached application. A context menu is shown.
2. Press ESC on the keyboard: The application crashes.
Actual Results:
An unhandled exception is thrown.
In the example code the following exception is shown in a message box.
---------------------------
---------------------------
System.NullReferenceException: Object reference not set to an instance of an
object
at System.Windows.Forms.ToolStripDropDown.ProcessArrowKey (Keys keyData)
[0x00000]
at System.Windows.Forms.ToolStrip.ProcessDialogKey (Keys keyData) [0x00000]
at System.Windows.Forms.ToolStripDropDown.ProcessDialogKey (Keys keyData)
[0x00000]
at System.Windows.Forms.Control.InternalPreProcessMessage
(System.Windows.Forms.Message& msg) [0x00000]
at System.Windows.Forms.Control.PreProcessMessage
(System.Windows.Forms.Message& msg) [0x00000]
at System.Windows.Forms.Control.PreProcessControlMessageInternal
(System.Windows.Forms.Message& msg) [0x00000]
at (wrapper remoting-invoke-with-check)
System.Windows.Forms.Control:PreProcessControlMessageInternal
(System.Windows.Forms.Message&)
at System.Windows.Forms.Application.RunLoop (Boolean Modal,
System.Windows.Forms.ApplicationContext context) [0x00000]
at System.Windows.Forms.Application.Run
(System.Windows.Forms.ApplicationContext context) [0x00000]
at System.Windows.Forms.Application.Run (System.Windows.Forms.Form mainForm)
[0x00000]
at MonoContextMenuBug.CrashMonoForm.Main () [0x00000]
---------------------------
OK
---------------------------
Expected Results:
The context menu should close, nothing else.
How often does this happen?
Always
Additional Information:
This minimal case is reproduced on Mono 2.4 on Windows Vista with the binary
compiled with Visual Studio 2008 SP1.
Our real application has crashed on older versions of Mono on both Windows and
Linux platforms.
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