Crash on project open

EDIT: CrashReporter link: [Link Removed]

EDIT2: Likely also this crash: [Link Removed]

EDIT3: This crash appears under a different Bugg in 4.7: [Link Removed]

Engine crashed when attempting to open project (recompiling bytecode for blueprint).

Unable to reproduce internally

Callstack in post:

MachineId:773DC7CE47721B1D27E57FA7F3569C6F EpicAccountId:f16265003be24d2694a9139c52e78edd

Unknown exception - code 00000001 (first/second chance not available)

Assertion failed: BlueprintObj->GeneratedClass [Link Removed] [Line: 542] Invalid generated class for EndLights

KERNELBASE + 24684 bytes UE4Editor_Core + 3092349 bytes UE4Editor_Core + 1597688 bytes UE4Editor_Core + 1479058 bytes UE4Editor_UnrealEd + 10034613 bytes UE4Editor_Engine + 1970481 bytes UE4Editor_CoreUObject + 240879 bytes UE4Editor_CoreUObject + 946774 bytes UE4Editor_CoreUObject + 1054484 bytes UE4Editor_CoreUObject + 944791 bytes UE4Editor_CoreUObject + 1054484 bytes UE4Editor_CoreUObject + 944791 bytes UE4Editor_CoreUObject + 947419 bytes UE4Editor_CoreUObject + 1062891 bytes UE4Editor_CoreUObject + 1460613 bytes UE4Editor_CoreUObject + 1193007 bytes UE4Editor_CoreUObject + 1189666 bytes UE4Editor_CoreUObject + 1193874 bytes UE4Editor_CoreUObject + 1189666 bytes UE4Editor_CoreUObject + 1193874 bytes UE4Editor_CoreUObject + 1189666 bytes UE4Editor_CoreUObject + 1189156 bytes UE4Editor_CoreUObject + 976397 bytes UE4Editor_CoreUObject + 1185872 bytes UE4Editor_CoreUObject + 951800 bytes UE4Editor_CoreUObject + 1026078 bytes UE4Editor_CoreUObject + 1460171 bytes UE4Editor_UnrealEd + 2768012 bytes UE4Editor_UnrealEd + 2700861 bytes UE4Editor_UnrealEd + 2612749 bytes UE4Editor_UnrealEd + 6316416 bytes UE4Editor_UnrealEd + 3168772 bytes UE4Editor_UnrealEd + 3167944 bytes UE4Editor_UnrealEd + 6555369 bytes UE4Editor_UnrealEd + 6310846 bytes UE4Editor!GuardedMain() + 285 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launch.cpp:123] UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:126] UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:202] UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]