Unreal Editor Crashes on Project Launch

When launching our current project, Unreal Editor crashes with SIGSEV (stack trace at end of report). This is on a Mac Pro 2014. It may be related to another team member deleting a bunch of files from project last night.

SIGSEGV: invalid attempt to access memory at address 0x3

EngineCrashHandler(FGenericCrashContext const&) Address = 0x4cb37ef  (filename not found) [in UE4Editor]
PlatformCrashHandler(int, __siginfo*, void*) Address = 0x4f775cf  (filename not found) [in UE4Editor-Core.dylib]
_sigtramp() Address = 0x846895aa (filename not found) [in libsystem_platform.dylib]

FMsg::Logf(char const*, int, FName const&, ELogVerbosity::Type, wchar_t const*, ...) Address = 0x4fd5f37  (filename not found) [in UE4Editor-Core.dylib]
FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, ...) Address = 0x4fd56ca  (filename not found) [in UE4Editor-Core.dylib]
FArchive::SerializeCompressed(void*, long long, ECompressionFlags, bool) Address = 0x502b00b  (filename not found) [in UE4Editor-Core.dylib]
FUntypedBulkData::SerializeBulkData(FArchive&, void*) Address = 0x55f8968  (filename not found) [in UE4Editor-CoreUObject.dylib]
FUntypedBulkData::MakeSureBulkDataIsLoaded() Address = 0x55f7bf7  (filename not found) [in UE4Editor-CoreUObject.dylib]
FUntypedBulkData::Lock(unsigned int) Address = 0x55f75d0  (filename not found) [in UE4Editor-CoreUObject.dylib]
FTextureSource::GetMipData(TArray<unsigned char, FDefaultAllocator>&, int) Address = 0x67d5784  (filename not found) [in UE4Editor-Engine.dylib]
FTextureCacheDerivedDataWorker::GetSourceMips(UTexture&, TArray<FImage, FDefaultAllocator>&, unsigned int, unsigned int) Address = 0x67f8692  (filename not found) [in UE4Editor-Engine.dylib]
FTextureCacheDerivedDataWorker::GetBuildInfo() Address = 0x67f6f2e  (filename not found) [in UE4Editor-Engine.dylib]
FTexturePlatformData::FinishCache() Address = 0x67e5ec1  (filename not found) [in UE4Editor-Engine.dylib]
UTexture::FinishCachePlatformData() Address = 0x67d80f0  (filename not found) [in UE4Editor-Engine.dylib]
UTexture2D::PostLoad() Address = 0x67d8085  (filename not found) [in UE4Editor-Engine.dylib]
UObject::ConditionalPostLoad() Address = 0x56805df  (filename not found) [in UE4Editor-CoreUObject.dylib]
EndLoad(wchar_t const*) Address = 0x570db03  (filename not found) [in UE4Editor-CoreUObject.dylib]
LoadPackage(UPackage*, wchar_t const*, unsigned int) Address = 0x570cbed  (filename not found) [in UE4Editor-CoreUObject.dylib]
UEditorEngine::Map_Load(wchar_t const*, FOutputDevice&) Address = 0xabbe2fc  (filename not found) [in UE4Editor-UnrealEd.dylib]
UEditorEngine::HandleMapCommand(wchar_t const*, FOutputDevice&, UWorld*) Address = 0xabd3b0b  (filename not found) [in UE4Editor-UnrealEd.dylib]
UEditorEngine::Exec(UWorld*, wchar_t const*, FOutputDevice&) Address = 0xabd0d8c  (filename not found) [in UE4Editor-UnrealEd.dylib]
UUnrealEdEngine::Exec(UWorld*, wchar_t const*, FOutputDevice&) Address = 0xaeaf62f  (filename not found) [in UE4Editor-UnrealEd.dylib]
FEditorFileUtils::LoadMap(FString const&, bool, bool, bool) Address = 0xac43233  (filename not found) [in UE4Editor-UnrealEd.dylib]
FEditorFileUtils::LoadDefaultMapAtStartup() Address = 0xac48e07  (filename not found) [in UE4Editor-UnrealEd.dylib]
FUnrealEdMisc::OnInit() Address = 0xae9fa9a  (filename not found) [in UE4Editor-UnrealEd.dylib]
EditorInit(IEngineLoop&) Address = 0xae96259  (filename not found) [in UE4Editor-UnrealEd.dylib]
GuardedMain(wchar_t const*) Address = 0x4cae232  (filename not found) [in UE4Editor]
-[UE4AppDelegate applicationDidFinishLaunching:] Address = 0x4cb4630  (filename not found) [in UE4Editor]
__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__() Address = 0x8d65be0c (filename not found) [in CoreFoundation]
_CFXNotificationPost() Address = 0x8d54f82d (filename not found) [in CoreFoundation]
-[NSNotificationCenter postNotificationName:object:userInfo:] Address = 0x859e07ba (filename not found) [in Foundation]
-[NSApplication _postDidFinishNotification] Address = 0x89403b69 (filename not found) [in AppKit]
-[NSApplication _sendFinishLaunchingNotification] Address = 0x8940389c (filename not found) [in AppKit]
-[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] Address = 0x89400786 (filename not found) [in AppKit]
-[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] Address = 0x894001db (filename not found) [in AppKit]
-[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] Address = 0x859fef0a (filename not found) [in Foundation]
_NSAppleEventManagerGenericHandler() Address = 0x859fed7d (filename not found) [in Foundation]
aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) Address = 0x864c3e1f (filename not found) [in AE]
dispatchEventAndSendReply(AEDesc const*, AEDesc*) Address = 0x864c3c32 (filename not found) [in AE]
aeProcessAppleEvent() Address = 0x864c3b36 (filename not found) [in AE]
AEProcessAppleEvent() Address = 0x8e9b2161 (filename not found) [in HIToolbox]
_DPSNextEvent() Address = 0x893fc0b6 (filename not found) [in AppKit]
-[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] Address = 0x893fb89b (filename not found) [in AppKit]
-[NSApplication run] Address = 0x893ef99c (filename not found) [in AppKit]
NSApplicationMain() Address = 0x893da783 (filename not found) [in AppKit]
tchar_main(int, wchar_t**) Address = 0x4cb4e9b  (filename not found) [in UE4Editor]
main() Address = 0x4cb4904  (filename not found) [in UE4Editor]
start() Address = 0x846905fd (filename not found) [in libdyld.dylib]

I’ve seen virtually same error output on my “lowly” retina macbook pro (8gb ram) - We deleted a ton of starter content from project last night. We use Perforce for version control and our temporary folders are not in VCS (Intermediate, Saved.) see: Crash in Mac Editor when Packaging for iOS - Mobile - Epic Developer Community Forums Windows (Android Build Target) Packager Fails with mscorlib error - Mobile - Epic Developer Community Forums

Could you please attach a log engine generated, it may contain more info about reason of crash. You can find it in your game’s editor subfolder of ~/Library/Logs/Unreal Engine. Thanks!

Three log files all generated from crashes today

Hey and ,

I apologize for delay in response. Are you still getting this crash in your project?

No, we deleted all “recreateable” folders that aren’t stored in source control, and it seems to have righted itself.

Very glad to hear it! Please let us know if this issue pops up again.