How to reproduce:
1. Open the attached "TestFor1064061.zip" project's SampleScene
2. Make sure that Verify Saving Assets is turned on in Edit -> Preferences window
3. Select Scene Settings GameObject in the Hierarchy
4. Click Add component overrides... in the Inspector window and add any Volume Component
5. Press Save All in the Save Assets window
6. Notice that Editor crashes

High Definition Render Pipeline is a new feature introduced in Unity 2018.1

Reproducible with: 2018.1.9f1, 2018.2.1f1

Could not test on 2018.3.0aX due to Save Assets window becoming unresponsive

Stack Trace:
(Unity) GetStacktrace
(Unity) GUIDebuggerManager::LogClipPop
(Unity) GUIClip::Internal_Pop
(Unity) GUIClip_CUSTOM_Internal_Pop