Editor crashes when scriptable render pipeline changed to none from HDRPAsset OR changing color space from gamma to linear. (when scriptable render pipeline is set to HDRPAsset).

Steps to reproduce:
1. Create a new project.
2. Go to Window > Package Manager > High Definition RP > Install.
3. Right-click in Project window > Create > Rendering > High Definition Render Pipeline Asset.
4. Go to Edit > Project Settings > Graphics.
5. Under Scriptable Render Pipeline Settings, drag and drop HDRP asset which is created in step no. 3.
6. Click the selector button on the right.
7. Select None.

Note:
1. If the following error is thrown in the console after step no. 5 then go to Player tab in project settings > Other settings > color space to 'Linear'.
error: "High Definition Render Pipeline doesn't support Gamma mode, change to Linear mode".
2. Editor crashes after changing color space.
3. Video is attached for the reference.

Actual result:
Editor crashes when scriptable render pipeline changed to none from HDRPAsset.

Expected result:
Scriptable render pipeline set to HDRP or none without crashing editor.

Reroducible in: 2019.2.0a13, 2019.2.0a7

Not reproducible in: 2019.1.0f2, 2019.2.0a6

Package found version: 6.5.3, 5.7.2

Environment: Windows only.

************************* Stack Trace ***************************

0x00007FF691FA33F9 (Unity) PAL_Memory_Free
0x00007FF691FA1125 (Unity) PAL_Memory_Free
0x00007FF6902BC08A (Unity) PAL_Thread_SupportsThreads
0x00007FF6908FCBC0 (Unity) PAL_Thread_SupportsThreads
0x00007FF6908F89EC (Unity) PAL_Thread_SupportsThreads
0x00007FF690B20E75 (Unity) PAL_Thread_SupportsThreads
0x00007FF690B21F33 (Unity) PAL_Thread_SupportsThreads
0x00007FF6913CE3F8 (Unity) PAL_Memory_Free
0x0000026D97056ECB (UnityEditor) UnityEditor.Handles.Internal_DrawCameraWithGrid()
0x0000026D9702D9C3 (UnityEditor) UnityEditor.Handles.DrawCameraImpl()
0x0000026D9702CE23 (UnityEditor) UnityEditor.Handles.DrawCameraStep1()
0x0000026D9702AA5B (UnityEditor) UnityEditor.SceneView.DoDrawCamera()
0x0000026D96FDB893 (UnityEditor) UnityEditor.SceneView.OnGUI()
0x0000026DC3871AB0 (mscorlib) System.Object.runtime_invoke_void__this__()
0x00007FFD14F4C11B (mono-2.0-bdwgc) mono_get_runtime_build_info
0x00007FFD14ED2282 (mono-2.0-bdwgc) mono_perfcounters_init
0x00007FFD14EDB452 (mono-2.0-bdwgc) mono_runtime_invoke_array
0x00007FFD14EDBBE9 (mono-2.0-bdwgc) mono_runtime_set_main_args
0x00007FFD14EDB3E6 (mono-2.0-bdwgc) mono_runtime_invoke_array
0x00007FFD14E80284 (mono-2.0-bdwgc) mono_lookup_internal_call
0x0000026DBD04BD56 (mscorlib) System.Reflection.MonoMethod.InternalInvoke()
0x0000026DBD049F1B (mscorlib) System.Reflection.MonoMethod.Invoke()
0x0000026DBD049BDF (mscorlib) System.Reflection.MethodBase.Invoke()
0x0000026DBD24C263 (UnityEditor) UnityEditor.HostView.Invoke()
0x0000026DBD24C0B3 (UnityEditor) UnityEditor.HostView.Invoke()
0x0000026D96FD7A0B (UnityEditor) UnityEditor.HostView.InvokeOnGUI()
0x0000026D96FD6F5B (UnityEditor) UnityEditor.DockArea.DrawView()
0x0000026D96FC3703 (UnityEditor) UnityEditor.DockArea.OldOnGUI()
0x0000026D96F397E1 (UnityEngine.UIElementsModule) UnityEngine.UIElements.IMGUIContainer.DoOnGUI()
0x0000026D96F377CB (UnityEngine.UIElementsModule) UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent()
0x0000026D96F35473 (UnityEngine.UIElementsModule) UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent()
0x0000026D96F310A2 (UnityEngine.UIElementsModule) UnityEngine.UIElements.UIR.RenderChainCommand.ExecuteNonDrawMesh()
0x0000026D96F2C113 (UnityEngine.UIElementsModule) UnityEngine.UIElements.UIR.UIRenderDevice.EvaluateChain()
0x0000026D96F25AF3 (UnityEngine.UIElementsModule) UnityEngine.UIElements.UIR.UIRenderDevice.DrawChain()
0x0000026D96F0BA9B (UnityEngine.UIElementsModule) UnityEngine.UIElements.UIR.RenderChain.Render()
0x0000026D96F09E43 (UnityEngine.UIElementsModule) UnityEngine.UIElements.UIRRepaintUpdater.DrawChain()
0x0000026D96F09730 (UnityEngine.UIElementsModule) UnityEngine.UIElements.UIRRepaintUpdater.Update()
0x0000026D96EE6D01 (UnityEngine.UIElementsModule) UnityEngine.UIElements.VisualTreeUpdater.UpdateVisualTree()
0x0000026D96EE6483 (UnityEngine.UIElementsModule) UnityEngine.UIElements.Panel.Repaint()
0x0000026D96EE5603 (UnityEngine.UIElementsModule) UnityEngine.UIElements.UIElementsUtility.DoDispatch()
0x0000026D96EE514B (UnityEngine.UIElementsModule) UnityEngine.UIElements.UIElementsUtility.ProcessEvent()
0x0000026D96EE4AAE (UnityEngine.IMGUIModule) UnityEngine.GUIUtility.ProcessEvent()
0x0000026D96EE4CD3 (UnityEngine.IMGUIModule) <Module>.runtime_invoke_bool_int_intptr()
0x00007FFD14F4C11B (mono-2.0-bdwgc) mono_get_runtime_build_info
0x00007FFD14ED2282 (mono-2.0-bdwgc) mono_perfcounters_init
0x00007FFD14EDB27F (mono-2.0-bdwgc) mono_runtime_invoke
0x00007FF692419C32 (Unity) PAL_Thread_YieldExecution
0x00007FF6924138F1 (Unity) PAL_Thread_YieldExecution
0x00007FF69240DB4A (Unity) PAL_Thread_YieldExecution
0x00007FF68F9BA959 (Unity) PAL_Thread_SupportsThreads
0x00007FF69040F54C (Unity) PAL_Thread_SupportsThreads
0x00007FF690D6C717 (Unity) PAL_Memory_Free
0x00007FF69040F45C (Unity) PAL_Thread_SupportsThreads
0x00007FF690D5F257 (Unity) PAL_Memory_Free
0x00007FF690D6F18D (Unity) PAL_Memory_Free
0x00007FF6904DD902 (Unity) PAL_Thread_SupportsThreads
0x00007FF6904DB1DC (Unity) PAL_Thread_SupportsThreads
0x00007FF690D50D05 (Unity) PAL_Memory_Free
0x00007FF690D5373F (Unity) PAL_Memory_Free
0x00007FF6939C8252 (Unity) InitializeNvCloth
0x00007FFD8CAB4034 (KERNEL32) BaseThreadInitThunk
0x00007FFD8F623691 (ntdll) RtlUserThreadStart