Null reference exception occurs on selecting "No Overrides" option in override window after an override has been applied through override window

Steps to Repro:
1. Open Unity or attached project
2. Hierarchy > right click > create empty
3. Drag game object to project window to create a prefab
4. Add any component or create child game object to the instance
5. Click override > select overridden property or object
6. Apply > Apply to prefab
7. Click on no overrides text in override window

Actual Result:
Null Reference exception occurs

Environment:
Windows and Mac

Occurring with:
2019.1.0a10, 2019.1.0a9, 2018.3.0b12 (e8a09cb958c6), 2018.3.0b11

Working with:
2018.3.0b10, 2019.1.0a8

Stack trace:
Error 1:
GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Error 2:
NullReferenceException: Object reference not set to an instance of an object
UnityEditor.PrefabOverridesTreeView.RowGUI (UnityEditor.IMGUI.Controls.TreeView+RowGUIArgs args) (at C:/buildslave/unity/build/Editor/Mono/Prefabs/PrefabOverrides/PrefabOverridesTreeView.cs:396)
UnityEditor.IMGUI.Controls.TreeView+TreeViewControlGUI.OnContentGUI (UnityEngine.Rect rect, System.Int32 row, UnityEditor.IMGUI.Controls.TreeViewItem item, System.String label, System.Boolean selected, System.Boolean focused, System.Boolean useBoldFont, System.Boolean isPinging) (at C:/buildslave/unity/build/Editor/Mono/GUI/TreeView/TreeViewControl/TreeViewControlGUI.cs:136)
UnityEditor.IMGUI.Controls.TreeViewGUI.DoItemGUI (UnityEngine.Rect rect, System.Int32 row, UnityEditor.IMGUI.Controls.TreeViewItem item, System.Boolean selected, System.Boolean focused, System.Boolean useBoldFont) (at C:/buildslave/unity/build/Editor/Mono/GUI/TreeView/TreeViewGUI.cs:266)
UnityEditor.IMGUI.Controls.TreeViewGUI.OnRowGUI (UnityEngine.Rect rowRect, UnityEditor.IMGUI.Controls.TreeViewItem item, System.Int32 row, System.Boolean selected, System.Boolean focused) (at C:/buildslave/unity/build/Editor/Mono/GUI/TreeView/TreeViewGUI.cs:198)
UnityEditor.IMGUI.Controls.TreeViewController.DoItemGUI (UnityEditor.IMGUI.Controls.TreeViewItem item, System.Int32 row, System.Single rowWidth, System.Boolean hasFocus) (at C:/buildslave/unity/build/Editor/Mono/GUI/TreeView/TreeViewController.cs:494)
UnityEditor.IMGUI.Controls.TreeViewController.IterateVisibleItems (System.Int32 firstRow, System.Int32 numVisibleRows, System.Single rowWidth, System.Boolean hasFocus) (at C:/buildslave/unity/build/Editor/Mono/GUI/TreeView/TreeViewController.cs:679)
UnityEditor.IMGUI.Controls.TreeViewController.OnGUI (UnityEngine.Rect rect, System.Int32 keyboardControlID) (at C:/buildslave/unity/build/Editor/Mono/GUI/TreeView/TreeViewController.cs:605)
UnityEditor.IMGUI.Controls.TreeView.OnGUI (UnityEngine.Rect rect) (at C:/buildslave/unity/build/Editor/Mono/GUI/TreeView/TreeViewControl/TreeViewControl.cs:414)
UnityEditor.PrefabOverridesWindow.OnGUI (UnityEngine.Rect rect) (at C:/buildslave/unity/build/Editor/Mono/Prefabs/PrefabOverrides/PrefabOverridesWindow.cs:214)
UnityEditor.PopupWindow.OnGUI () (at C:/buildslave/unity/build/Editor/Mono/GUI/PopupWindow.cs:90)
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <ac823e2bb42b41bda67924a45a0173c3>:0)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <ac823e2bb42b41bda67924a45a0173c3>:0)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at <ac823e2bb42b41bda67924a45a0173c3>:0)
UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:342)
UnityEditor.HostView.Invoke (System.String methodName) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:336)
UnityEditor.HostView.OldOnGUI () (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:129)
UnityEngine.Experimental.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 worldTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout) (at C:/buildslave/unity/build/Modules/UIElements/IMGUIContainer.cs:244)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)