SpawnActor crashing with Access violation - code c0000005 (first/second chance not available

I am experiencing a crash when trying to spawn an actor with GetWorld()->SpawnActor from an existing actor in the level.

I have an actor named AVoxWorld that I would like to spawn chunk actors when the world is dragged into the editor.

void AVoxWorld::PostInitProperties()
{
	Super::PostInitProperties();
	GenerateWorld();
}

void AVoxWorld::GenerateWorld()
{
	GetWorld()->SpawnActor<AChunk>(FVector(0, 0, 0), FRotator::ZeroRotator);
}

and my AChunk class is just an unmodified actor template:

AChunk::AChunk()
{
 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = false;
}

When I drag the world into the editor, I receive the following error:

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

UE4Editor_Engine!UWorld::SpawnActor() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\engine\private\levelactor.cpp:278]
UE4Editor_Engine!UWorld::SpawnActor() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\engine\private\levelactor.cpp:271]
UE4Editor_SP_Voxel_8643!AVoxWorld::GenerateWorld() [c:\users\andrew\documents\unreal projects\sp_voxel\source\sp_voxel\voxworld.cpp:43]
UE4Editor_CoreUObject!FObjectInitializer::PostConstructInit() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:2772]
UE4Editor_CoreUObject!FObjectInitializer::~FObjectInitializer() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:2629]
UE4Editor_HotReload!FHotReloadClassReinstancer::ReconstructClassDefaultObject() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:208]
UE4Editor_HotReload!FHotReloadClassReinstancer::RecreateCDOAndSetupOldClassReinstancing() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:243]
UE4Editor_HotReload!FHotReloadClassReinstancer::FHotReloadClassReinstancer() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:316]
UE4Editor_HotReload!FHotReloadClassReinstancer::Create() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.h:114]
UE4Editor_HotReload!FHotReloadModule::ReinstanceClass() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\hotreload\private\hotreload.cpp:1228]
UE4Editor_HotReload!FHotReloadModule::ReinstanceClasses() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\hotreload\private\hotreload.cpp:1219]
UE4Editor_HotReload!TBaseRawMethodDelegateInstance<0,FHotReloadModule,void __cdecl(void)>::ExecuteIfSafe() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:638]
UE4Editor_CoreUObject!UClassReplaceHotReloadClasses() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:688]
UE4Editor_CoreUObject!ProcessNewlyLoadedUObjects() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:835]
UE4Editor_CoreUObject!TBaseStaticDelegateInstance<void __cdecl(void)>::ExecuteIfSafe() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:1017]
UE4Editor_Core!TBaseMulticastDelegate<void>::Broadcast() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:921]
UE4Editor_Core!FModuleManager::LoadModuleWithFailureReason() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\modules\modulemanager.cpp:461]
UE4Editor_Core!FModuleManager::LoadModule() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\modules\modulemanager.cpp:322]
UE4Editor_HotReload!FHotReloadModule::DoHotReloadInternal() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\hotreload\private\hotreload.cpp:828]
UE4Editor_HotReload!UE4Function_Private::TFunctionRefCaller<<lambda_845f9b2944b03bbc30be1e1f4a8d7f4b>,void __cdecl(TMap<FString,FString,FDefaultSetAllocator,TDefaultMapKeyFuncs<FString,FString,0> > const & __ptr64,bool,enum ECompilationResult::Type)>::Call() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\templates\function.h:246]
UE4Editor_HotReload!FHotReloadModule::CheckForFinishedModuleDLLCompile() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\hotreload\private\hotreload.cpp:1877]
UE4Editor_HotReload!FHotReloadModule::Tick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\hotreload\private\hotreload.cpp:566]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:1020]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:371]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2834]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\launch.cpp:156]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

I should note a couple of things:

  1. I’m using PostInitProperties so that I can preview the world generation in the editor. I may switch to OnConstruction in the future but this is probably out of the scope of this question.
  2. I have tried putting the call to GenerateWorld() into BeginPlay(), and it crashes as soon as I hit play with the same error.

Thanks for your help in advance!