Crashes when trying to see details of System.Windows.Forms.WebBrowser

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Execute in f#Interactive
let browser = new System.Windows.Forms.WebBrowser()
2. fseye pops up
3. browser variable is shown
4. trying to expand the browser-treenode result in closing the fseye-window and 
the following exceptions appear in f#interactive:

 System.NullReferenceException: Object reference not set to an instance of an object.
   at Swensen.FsEye.WatchModel.getPropertyWatch@181(Object ownerValue, Type ownerTy, PropertyInfo pi)
   at [email protected](MemberInfo m)
   at [email protected](b& )
   at Microsoft.FSharp.Collections.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext()
   at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeOuter@675[T,TResult](ConcatEnumerator`2 x, Unit unitVar0)
   at <StartupCode$FSharp-Core>[email protected](IEnumerable`1& next)
   at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl()
   at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.System-Collections-IEnumerator-MoveNext()
   at [email protected](b& )
   at Microsoft.FSharp.Collections.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext()
   at [email protected](b& )
   at Microsoft.FSharp.Collections.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext()
   at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeOuter@675[T,TResult](ConcatEnumerator`2 x, Unit unitVar0)
   at <StartupCode$FSharp-Core>[email protected](IEnumerable`1& next)
   at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl()
   at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.System-Collections-IEnumerator-MoveNext()
   at Microsoft.FSharp.Collections.SeqModule.ToArray[T](IEnumerable`1 source)
   at <StartupCode$FsEye>.$WatchTreeView.loadWatches@159(WatchTreeView this, SynchronizationContext context, TreeNode node, Watch watch)
   at <StartupCode$FsEye>[email protected](TreeViewEventArgs args)
   at Microsoft.FSharp.Control.CommonExtensions.SubscribeToObservable@1777.OnNext(T value)
   at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.h@744.Invoke(Object _arg1, TArgs args)
   at <StartupCode$FsEye>[email protected](Object sender, TreeViewEventArgs e)
   at System.Windows.Forms.TreeView.OnAfterExpand(TreeViewEventArgs e)
   at System.Windows.Forms.TreeView.TvnExpanded(NMTREEVIEW* nmtv)
   at System.Windows.Forms.TreeView.WmNotify(Message& m)
   at System.Windows.Forms.TreeView.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
Stopped due to error
Microsoft.FSharp.Compiler.ErrorLogger+StopProcessing: Exception of type 
'Microsoft.FSharp.Compiler.ErrorLogger+StopProcessing' was thrown.
   at Microsoft.FSharp.Compiler.Interactive.Shell.ErrorLoggerThatStopsOnFirstError.AbortOnError()
   at Microsoft.FSharp.Compiler.Interactive.Shell.threadException@2131-1.Invoke(Unit unitVar0)
   at Microsoft.FSharp.Compiler.Interactive.Shell.threadException@2129[a](ErrorLoggerThatStopsOnFirstError errorLogger, a exn)
   at System.Windows.Forms.Application.ThreadContext.OnThreadException(Exception t)
   at System.Windows.Forms.Control.WndProcException(Exception e)
   at System.Windows.Forms.Control.ControlNativeWindow.OnThreadException(Exception e)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.SendMessage(HandleRef hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at System.Windows.Forms.Control.SendMessage(Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.Control.ReflectMessageInternal(IntPtr hWnd, Message& m)
   at System.Windows.Forms.Control.WmNotify(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
Stopped due to error
Microsoft.FSharp.Compiler.ErrorLogger+StopProcessing: Exception of type 
'Microsoft.FSharp.Compiler.ErrorLogger+StopProcessing' was thrown.
   at Microsoft.FSharp.Compiler.Interactive.Shell.ErrorLoggerThatStopsOnFirstError.AbortOnError()
   at Microsoft.FSharp.Compiler.Interactive.Shell.threadException@2131-1.Invoke(Unit unitVar0)
   at Microsoft.FSharp.Compiler.Interactive.Shell.threadException@2129[a](ErrorLoggerThatStopsOnFirstError errorLogger, a exn)
   at System.Windows.Forms.Application.ThreadContext.OnThreadException(Exception t)
   at System.Windows.Forms.Control.WndProcException(Exception e)
   at System.Windows.Forms.Control.ControlNativeWindow.OnThreadException(Exception e)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at System.Windows.Forms.NativeWindow.DefWndProc(Message& m)
   at System.Windows.Forms.Control.DefWndProc(Message& m)
   at System.Windows.Forms.TreeView.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.TreeView.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


What version of the product are you using? On what operating system?
Windows 7 64-bit
VS 2010 .net 4.0
fseye 1.0.0-final

Original issue reported on code.google.com by [email protected] on 28 Feb 2012 at 4:20

[GoogleCodeExporter]

Thanks for your report, Frederik. I hope to look into this over the next week.

Original comment by [email protected] on 5 Apr 2012 at 11:00

[GoogleCodeExporter]

Bug verified: the problem is that the WebBrowser.Site property is not readable 
(has a setter but not a getter). Will fix by either skipping write-only 
properties altogether or displaying with a message explaining that the value 
cannot be retrieved.

Original comment by [email protected] on 8 Apr 2012 at 1:06

• Changed state: Started

[GoogleCodeExporter]

This issue was closed by revision r254.

Original comment by [email protected] on 8 Apr 2012 at 1:46

• Changed state: Fixed

[GoogleCodeExporter]

Original comment by [email protected] on 13 Apr 2012 at 7:47

• Added labels: Milestone-Release1.0.1