ArgumentNullException error is thrown on clicking edit button from Line Renderer.

Steps to Reproduce:
1. Create a new unity project
2. Create an Empty GameObject
3. Add Line Renderer component to it.
4. Click on Edit Button from the inspector

Environment:
Occurring on both Windows and Mac

Reproducible on: 2018.2.0a4, 2018.2.0a5

Note: Line Renderer Editor is introduced in unity 2018.2.0a4

Stack Trace:
ArgumentNullException: Argument cannot be null.
Parameter name: cloudTransform
UnityEditor.LightProbeVisualization.DrawPointCloud (UnityEngine.Vector3[] unselectedPositions, UnityEngine.Vector3[] selectedPositions, Color baseColor, Color selectedColor, Single scale, UnityEngine.Transform cloudTransform)
UnityEditor.PointEditor.Draw (IEditablePoint points, UnityEngine.Transform cloudTransform, System.Collections.Generic.List`1 selection, Boolean twoPassDrawing) (at C:/buildslave/unity/build/Editor/Mono/PointEditor.cs:267)
UnityEditor.LineRendererEditor.EditSceneGUI () (at C:/buildslave/unity/build/Editor/Mono/Inspector/LineRendererToolModes.cs:206)
UnityEditor.LineRendererInspector.InternalOnSceneView () (at C:/buildslave/unity/build/Editor/Mono/Inspector/LineRendererEditor.cs:492)
UnityEditor.LineRendererInspector.OnSceneGUI () (at C:/buildslave/unity/build/Editor/Mono/Inspector/LineRendererEditor.cs:504)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.SceneView.CallOnSceneGUI () (at C:/buildslave/unity/build/Editor/Mono/SceneView/SceneView.cs:2622)
UnityEditor.SceneView.HandleSelectionAndOnSceneGUI () (at C:/buildslave/unity/build/Editor/Mono/SceneView/SceneView.cs:1935)
UnityEditor.SceneView.OnGUI () (at C:/buildslave/unity/build/Editor/Mono/SceneView/SceneView.cs:1772)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:295)
UnityEditor.HostView.Invoke (System.String methodName) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:288)
UnityEditor.HostView.InvokeOnGUI (Rect onGUIPosition) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:255)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)