Editor Crashes After Building Lighting with Blueprint Set to Native Parent Class: Light

Whenever a Blueprint set to Native Parent Class: Light is placed into a level, Editor crashes after building lighting. The Blueprint does not need to contain an actual light component to crash the editor after the lighting build. This has been tested in 4.17 and 4.18.

From User:

Whenever i click on Build->Build Lightning Only the editor crashes.

What i have is: empty scene, with one blueprint added to it

the blueprint contains a point light, and has Native Parent Class: Light

When i remove the blueprint from the scene the error does not occur.

When i remove the PointLight from the Blueprint (so only empty blueprint with Native Parent Class: Light added to the scene) the problem also occurs.

1. Open new project (empty scene)
2. Create new Blueprint containing only a Point Light
3. Set Native Parent Class: Light
4. Place BP into level, Build Lighting Only

Result: Editor crashes after Lighting Build completion

LoginId:77ac66cf4b506a51a458c382c4ec63c2
EpicAccountId:5caf2c99925243e8b9b1bdcc9cd0e6cf

Access violation - code c0000005 (first/second chance not available)

UE4Editor_Core!FCrc::MemCrc_DEPRECATED() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\misc\crc.cpp:461]
UE4Editor_UnrealEd!TSet<TTuple<FGuid,AActor * __ptr64>,TDefaultMapHashableKeyFuncs<FGuid,AActor * __ptr64,0>,FDefaultSetAllocator>::FindId() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\public\containers\set.h:625]
UE4Editor_UnrealEd!UEditorEngine::Map_Check() [d:\build\++ue4+release-4.18+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:3775]
UE4Editor_UnrealEd!UEditorEngine::HandleMapCommand() [d:\build\++ue4+release-4.18+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:5961]
UE4Editor_UnrealEd!UEditorEngine::Exec() [d:\build\++ue4+release-4.18+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:5445]
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() [d:\build\++ue4+release-4.18+compile\sync\engine\source\editor\unrealed\private\unrealedsrv.cpp:672]
UE4Editor_Engine!UEngine::TickDeferredCommands() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\unrealengine.cpp:1476]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3456]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
kernel32
ntdll

Engine crashes on completion of lighthing build