I noted the same crash behavior. I think that’s because at some moments in editor(or in game) GetWorld() returns null (eg when changing map, or closing app), so I don’t think that’s actually a bug
The crash happens during streaming level unloading and loading. The last entries from the log file are of the form:
[2016.02.02-17.54.48:330][271]LogWorld: PIE: Copying PIE streaming level from /Game/Levels/Chapter2Lighting.Chapter2Lighting to /Game/Levels/UEDPIE_0_Chapter2Lighting.Chapter2Lighting. OwningWorld: /Game/Levels/UEDPIE_0_DenaliMaster.DenaliMaster
If we see the issue again I’ll save a minidump and attach.
If you have steps that we can follow to reproduce this issue in a clean project, please provide them as well. Otherwise, please post the callstack here as soon as you can.
I am marking this topic as resolved for tracking purposes, as we have not heard from you in a few days. If this issue persists, feel free to respond to this thread. For any new issues, please create a new Answerhub topic.