VS 2013 Crash When Using JSON Deserialize Method

Question

I've created a C# ASP.NET method which simply takes a string property containing JSON, both inside the same class. My issue is that whenever I type the .Deserialize method (the commented line) Visual Studio 2013 crashes with an "Unhandled Exception" in event logs.

public object JSONAsObject()
{
    object obj = new object();
    JavaScriptSerializer js = new JavaScriptSerializer();
    // obj = js.Deserialize<object>(this._json);
    return obj;
}

If I write the line in comments (as above) then remove the comments there's no problem so the issue appears to be with Intellisense or the way I'm writing the code - anyone have any ideas?

Crash log

Application: devenv.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.ArgumentNullException
Stack:
   at System.Text.RegularExpressions.Regex.Escape(System.String)
   at Microsoft.OneCode.Utilities.UserControl.CodeSnippetsTextBox.UpdateRegex()
   at Microsoft.OneCode.Utilities.UserControl.CodeSnippetsTextBox.OnMyWorkCollectionChanged(System.Object, System.Collections.Specialized.NotifyCollectionChangedEventArgs)
   at System.Collections.ObjectModel.ObservableCollection`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs)
   at System.Collections.ObjectModel.ObservableCollection`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].InsertItem(Int32, System.__Canon)
   at System.Collections.ObjectModel.Collection`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Add(System.__Canon)
   at Microsoft.OneCode.IntellisensePresenter.ViewModel.IntellisenseViewModel.UpdateCodeSnippets(System.Collections.Generic.IEnumerable`1<Microsoft.OneCode.DataModel.CodeSearchResult>)
   at Microsoft.OneCode.IntellisensePresenter.ViewModel.IntellisenseViewModel+<>c__DisplayClass5.<SearchCode>b__2()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)

Please let me know if this needs to go onto SuperUser.

Edit 1: Just to confirm this issue occurs during development, not at runtime. VS crashes when I am typing the code.

Edit 2: This issue only occurs with this particular line. The system I'm working with is massive and I've never seen the problem before.

Edit 3: Same issue in a brand new project - potentially a bug in VS 2013 but I don't know what's throwing the exception in the first place.

Answer 1

As @Jehof suggested in the comments I disabled all of my VS 2013 extensions, which fixed the problem. Enabling each extension one by one showed that the Bing Developer Assistant was causing the problem. There was an update which hasn't installed - installing this update fixed the problem.

To anyone else with such a problem, ensure VS and all extensions are fully updated.

Answer 2

Visual Studio keeps crashing Visual Studio when working with TBS and Angular JS.

System.NullReferenceException was unhandled

Additional information: Object reference not set to an instance of an object.

IntelliSense uses large amounts of memory on medium/large projects which can result in crashes and instability - you can turn off completions in Tools/Options/Text Editor/Node.js/Statement completion/Auto list members to avoid this (recommended).