'IndexOutOfRangeException: Array index is out of range' Compilation Error

I upgraded my project from Unity 4.6 to 5.0 and I can't work because of the error in the Editor Log:


IndexOutOfRangeException: Array index is out of range.
at UnityEditor.Graphs.AnimatorControllerTool.ResetBreadCrumbs () [0x00046] in C:\buildslave\unity\build\Editor\Graphs\UnityEditor.Graphs\Animation\AnimatorControllerTool.cs:350

at UnityEditor.Graphs.AnimatorControllerTool.ResetUI () [0x00000] in C:\buildslave\unity\build\Editor\Graphs\UnityEditor.Graphs\Animation\AnimatorControllerTool.cs:326

at UnityEditor.Graphs.LayerControllerView.get_selectedLayerIndex () [0x0005e] in C:\buildslave\unity\build\Editor\Graphs\UnityEditor.Graphs\Animation\LayerControllerView.cs:28

at UnityEditor.Graphs.LayerControllerView.Init (IAnimatorControllerEditor host) [0x000ca] in C:\buildslave\unity\build\Editor\Graphs\UnityEditor.Graphs\Animation\LayerControllerView.cs:128

at UnityEditor.Graphs.AnimatorControllerTool.Init () [0x00016] in C:\buildslave\unity\build\Editor\Graphs\UnityEditor.Graphs\Animation\AnimatorControllerTool.cs:285

at UnityEditor.Graphs.AnimatorControllerTool.OnEnable () [0x00000] in C:\buildslave\unity\build\Editor\Graphs\UnityEditor.Graphs\Animation\AnimatorControllerTool.cs:234
UnityEditorInternal.InternalEditorUtility:LoadSerializedFileAndForget(String)
UnityEditor.WindowLayout:LoadWindowLayout(String, Boolean) (at C:\buildslave\unity\build\Editor\Mono\GUI\WindowLayout.cs:482)


Do you know how to fix that?

 

I just upgraded a project from 4.5 to 4.6 and also see this error spammed in the editor:
IndexOutOfRangeException: Array index is out of range.
SyntaxTree.VisualStudio.Unity.Bridge.WinPath.Combine (System.String left, System.String right)
SyntaxTree.VisualStudio.Unity.Bridge.UnityProject.Folders ()
SyntaxTree.VisualStudio.Unity.Bridge.UnityProject+<>c__DisplayClass18.<Serialize>b__15 ()
SyntaxTree.VisualStudio.Unity.Bridge.UnityProject.ItemGroup (System.IO.TextWriter w, System.Action a)
SyntaxTree.VisualStudio.Unity.Bridge.UnityProject.Serialize (System.IO.TextWriter w)
SyntaxTree.VisualStudio.Unity.Bridge.ProjectFile.WriteIfNecessary (SyntaxTree.VisualStudio.Unity.Bridge.FileGenerationHandler generationHandler)
SyntaxTree.VisualStudio.Unity.Bridge.ProjectFilesGenerator.GenerateProjectFiles ()
SyntaxTree.VisualStudio.Unity.Bridge.ProjectFilesGenerator+<>c__DisplayClass1.<.cctor>b__0 ()
UnityEditor.EditorApplication.Internal_CallUpdateFunctions ()

UPDATE:
Looks like UnityVS needed to be reimported.