Clicking on checks messages for a project file causes Visual Studio to crash

[jcansdale]

Versions

• GitHub Extension for Visual Studio version: 2.6.0.6187
• Visual Studio version: 2017

What happened

1. Clicked on checks messages for a .csproj
2. Visual Studio crashed

Steps to Reproduce

Steps to reproduce the behavior:

1. Open the github/VisualStudio repository
2. Open Pull request 2049
3. Scroll down to 'GitHub.VisualStudio.csproj'
4. Click on ⚠️10
5. Visual Studio crashes

Expected behavior

• Open the .csproj file and show the checks.
  Note: This is easier said than done!

Screenshots

Logs

Application: devenv.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.ArgumentException
   at EnvDTE.Commands.Item(System.Object, Int32)
   at GitHub.Services.PullRequestEditorService.RaiseWhenAvailable(System.String, Int32, System.Object)
   at GitHub.Services.PullRequestEditorService+<OpenDiff>d__14.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)
   at GitHub.ViewModels.GitHubPane.PullRequestFilesViewModel+<OpenFirstAnnotation>d__8.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)
   at GitHub.ViewModels.GitHubPane.PullRequestFilesViewModel+<>c__DisplayClass7_0+<<-ctor>b__6>d.MoveNext()

Exception Info: ReactiveUI.UnhandledErrorException
   at ReactiveUI.RxApp+<>c__DisplayClass0_0.<.cctor>b__2()
   at System.Reactive.Concurrency.Scheduler.Invoke(System.Reactive.Concurrency.IScheduler, System.Action)
   at System.Reactive.Concurrency.DispatcherScheduler+<>c__DisplayClass12_0`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].<Schedule>b__0()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at System.Windows.Threading.ExceptionWrapper.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 MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(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 MS.Internal.CulturePreservingExecutionContext.Run(MS.Internal.CulturePreservingExecutionContext, 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 System.Windows.Threading.ExceptionWrapper.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)