Event that is fired when an actor is deleted from editor?

Overiding BeginDestroy() crashes my editor anu idea 4.15 vs2013

" Fatal error: [File:D:\Build++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp] [Line: 788]
CBaseUnitCharacter /Engine/Transient.BPGC_ARCH_FOR_CDO_CBaseUnitCharacter_1 failed to route BeginDestroy "