Setting inherited variables in child blueprint crash editor

PIE without compiling child blueprint (3rdSpiderPawn in example) that is attempting to affect an inherited variable will crash the editor.

Additional Information: User has several cast to nodes casting to the 3rdSpiderPawn within the 3rdSpiderPawn blueprint. This crash occurred even after removing them.

Workaround:
Compile 3rdSpiderPawn before pressing PIE.

Frequency: 3/3

CrashReporter: [Link Removed]

1. Download attached project:

[Link Removed]

2. Unzip and open HackNSlacks.uproject
3. Press PIE

MachineId:4E82586D46B558EA69EF0EAA821297B1
EpicAccountId:1558531203f84e81b70959b8a59badef

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

Assertion failed: ((UObject*)ContainerPtr)->IsA((UClass*)GetOuter()) [Link Removed] [Line: 357]
'3rdSpiderPawn_44' is of class '3rdSpiderPa

KERNELBASE + 37901 bytes
UE4Editor_Core!FOutputDeviceWindowsError::Serialize() + 292 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor_Core!FOutputDevice::Logf__VA() + 248 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:144]
UE4Editor_Core!FDebug::AssertFailed() + 1079 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:224]
UE4Editor_CoreUObject!UObject::execInstanceVariable() + 488 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:975]
UE4Editor_CoreUObject!UObject::execLetObj() + 84 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1271]
UE4Editor_CoreUObject!UObject::ProcessInternal() + 1644 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:602]
UE4Editor_CoreUObject!UObject::CallFunction() + 2707 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:516]
UE4Editor_CoreUObject!UObject::ProcessInternal() + 1644 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:602]
UE4Editor_CoreUObject!UFunction::Invoke() + 180 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\class.cpp:3713]
UE4Editor_CoreUObject!UObject::ProcessEvent() + 3036 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:924]
UE4Editor_Engine!AActor::ProcessEvent() + 259 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actor.cpp:529]
UE4Editor_Engine!AWorldSettings::NotifyBeginPlay() + 342 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\worldsettings.cpp:119]
UE4Editor_Engine!AGameMode::HandleMatchHasStarted() + 426 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\gamemode.cpp:602]
UE4Editor_Engine!AGameMode::SetMatchState() + 141 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\gamemode.cpp:711]
UE4Editor_Engine!AGameMode::StartMatch() + 83 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\gamemode.cpp:579]
UE4Editor_Engine!UGameInstance::StartPIEGameInstance() + 1545 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\gameinstance.cpp:218]
UE4Editor_UnrealEd!UEditorEngine::CreatePIEGameInstance() + 8708 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\playlevel.cpp:2861]
UE4Editor_UnrealEd!UEditorEngine::PlayInEditor() + 7184 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\playlevel.cpp:2212]
UE4Editor_UnrealEd!UEditorEngine::StartQueuedPlayMapRequest() + 643 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\playlevel.cpp:974]
UE4Editor_UnrealEd!UEditorEngine::Tick() + 3604 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editor.cpp:1226]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() + 22 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealedengine.cpp:347]
UE4Editor!FEngineLoop::Tick() + 4179 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2257]
UE4Editor!GuardedMain() + 1404 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]