https://bugzilla.novell.com/show_bug.cgi?id=420139
Summary: NRE at WindowsFormsSynchronizationContext::cctor()
Product: Mono: Class Libraries
Version: 1.9
Platform: i686
OS/Version: Windows Server 2008
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Windows.Forms
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
QAContact: [email protected]
Found By: ---
Description of Problem:
Static constructor of WindowsFormsSynchronizationContext throws a
NullReferenceException (WindowsFormsSynchronizationContext appears to be
accessed by Control constructor, thus invoking the static constructor).
Steps to reproduce the problem:
1. Invoke Control Constructor, e.g.:
namespace MonoTest {
static class Program {
[STAThread]
static void Main() {
Application.Run(new Form());
}
}
}
2. Execute application using Mono
Actual Results:
Application throws TypeInitializationException, with an inner exception of
NullReferenceException
Expected Results:
Application should display a blank window
How often does this happen?
Every execution
Additional Information:
This has only been experienced on Windows Server 2008
Exception output:
Unhandled Exception: System.TypeInitializationException: An exception was
thrown by the type initializer for
System.Windows.Forms.WindowsFormsSynchronizationContext --->
System.NullReferenceException: Object reference not set to an instance of an
object
at (wrapper native-to-managed)
System.Windows.Forms.XplatUIWin32.InternalWndProc
(intptr,System.Windows.Forms.Msg,intptr,intptr) <0x00000>
at (wrapper managed-to-native)
System.Windows.Forms.XplatUIWin32.Win32CreateWindow
(System.Windows.Forms.WindowExStyles,string,string,System.Windows.Forms.WindowStyles,int,int,int,int,intptr,intptr,intptr,intptr)
<0x00004>
at System.Windows.Forms.XplatUIWin32.CreateWindow
(System.Windows.Forms.CreateParams) <0x0039f>
at System.Windows.Forms.XplatUI.CreateWindow
(System.Windows.Forms.CreateParams) <0x00015>
at System.Windows.Forms.NativeWindow.CreateHandle
(System.Windows.Forms.CreateParams) <0x00037>
at System.Windows.Forms.Control.CreateHandle () <0x00076>
at System.Windows.Forms.Control.CreateControl () <0x0005d>
at (wrapper remoting-invoke-with-check)
System.Windows.Forms.Control.CreateControl () <0x00036>
at System.Windows.Forms.WindowsFormsSynchronizationContext..cctor () <0x0002f>
--- End of inner exception stack trace ---
at System.Windows.Forms.Control..ctor () [0x00000]
at System.Windows.Forms.ScrollableControl..ctor () [0x00000]
at System.Windows.Forms.ContainerControl..ctor () [0x00000]
at System.Windows.Forms.Form..ctor () [0x00000]
at (wrapper remoting-invoke-with-check) System.Windows.Forms.Form:.ctor ()
at MonoTest.Program.Main () [0x00000]
--
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