Crash on 'Save All' (4.2)

piinecone · June 6, 2014, 9:29pm

Branch: Binary

Build: 4.2.0-2092659

System Specs:

Steps to Reproduce:

It doesn’t happen consistently enough to reliably reproduce, but at least a couple of times per day hitting ‘Save All’ in level editor after switching from a blueprint will cause a crash. This happens in new or existing projects, and seems to have started happening with 4.2 release.

Call stack:

SIGSEGV: invalid attempt to access memory at address 0x3

EngineCrashHandler(FGenericCrashContext const&) [in UE4Editor) + 15
, line 994524901] [in UE4Editor]
PlatformCrashHandler(int, __siginfo*, void*) [in UE4Editor-Core.dylib) + 95
, line 994524901] [in UE4Editor-Core.dylib]
_sigtramp() Address = 0x922c45aa (filename not found) [in libsystem_platform.dylib]

FMsg::Logf(char const*, int, FName const&, ELogVerbosity::Type, wchar_t const*, ...) Address = 0x41bead5  (filename not found) [in UE4Editor-Core.dylib]
StaticFindObject(UClass*, UObject*, wchar_t const*, bool) Address = 0x48ae873  (filename not found) [in UE4Editor-CoreUObject.dylib]
FGameModeInfoCustomizer::GetCurrentGameModeClass() const Address = 0x9bda64b  (filename not found) [in UE4Editor-UnrealEd.dylib]
FGameModeInfoCustomizer::CanBrowseGameMode() const Address = 0x9bda1a9  (filename not found) [in UE4Editor-UnrealEd.dylib]
TBaseSPMethodDelegateInstance_RetVal_NoParams_Const<FGameModeInfoCustomizer, bool, (ESPMode::Type)0>::Execute() const Address = 0x260e5179 (filename not found) [in UE4Editor-DetailCustomizations.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89fae82  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
LocateWidgetsUnderCursor_Helper(FArrangedWidget&, FVector2D, FArrangedChildren&, bool) Address = 0x89faea6  (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::LocateWindowUnderMouse(FVector2D, TArray<TSharedRef<SWindow, (ESPMode::Type)0>, FDefaultAllocator> const&, bool) Address = 0x89fa7b5  (filename not found) [in UE4Editor-Slate.dylib]
SWindow::GetCurrentWindowZone(FVector2D) Address = 0x92f9cd8  (filename not found) [in UE4Editor-SlateCore.dylib]
FSlateApplication::GetWindowZoneForPoint(TSharedRef<FGenericWindow, (ESPMode::Type)0> const&, int, int) Address = 0x8a1d786  (filename not found) [in UE4Editor-Slate.dylib]
FMacApplication::IsWindowMovable(FSlateCocoaWindow*, bool*) Address = 0x4148fba  (filename not found) [in UE4Editor-Core.dylib]
FMacApplication::ProcessEvent(NSEvent*) Address = 0x4149c60  (filename not found) [in UE4Editor-Core.dylib]
FMacApplication::ProcessDeferredEvents(float) Address = 0x4149324  (filename not found) [in UE4Editor-Core.dylib]
FSlateApplication::Tick() Address = 0x89ff754  (filename not found) [in UE4Editor-Slate.dylib]
TickSlate() Address = 0x98fe579  (filename not found) [in UE4Editor-UnrealEd.dylib]
UPackage::SavePackage(UPackage*, UObject*, EObjectFlags, wchar_t const*, FOutputDevice*, ULinkerLoad*, bool, bool, unsigned int, ITargetPlatform const*, FDateTime const&) Address = 0x487ea60  (filename not found) [in UE4Editor-CoreUObject.dylib]
UEditorEngine::SavePackage(UPackage*, UObject*, EObjectFlags, wchar_t const*, FOutputDevice*, ULinkerLoad*, bool, bool, unsigned int, ITargetPlatform const*, FDateTime const&) Address = 0x979ada7  (filename not found) [in UE4Editor-UnrealEd.dylib]
SaveWorld(UWorld*, FString const*, wchar_t const*, wchar_t const*, bool, bool, FString&, bool, bool) Address = 0x9905eed  (filename not found) [in UE4Editor-UnrealEd.dylib]
FEditorFileUtils::SaveMap(UWorld*, FString const&) Address = 0x99105c7  (filename not found) [in UE4Editor-UnrealEd.dylib]
InternalSavePackage(UPackage*, bool&, FOutputDevice&) Address = 0x9913f55  (filename not found) [in UE4Editor-UnrealEd.dylib]
FEditorFileUtils::PromptForCheckoutAndSave(TArray<UPackage*, FDefaultAllocator> const&, bool, bool, TArray<UPackage*, FDefaultAllocator>*) Address = 0x99126be  (filename not found) [in UE4Editor-UnrealEd.dylib]
FEditorFileUtils::SaveDirtyPackages(bool, bool, bool, bool, bool, bool*) Address = 0x990f2d6  (filename not found) [in UE4Editor-UnrealEd.dylib]
TBaseStaticDelegateInstance_NoParams<void>::ExecuteIfSafe() const Address = 0xade876a  (filename not found) [in UE4Editor-MainFrame.dylib]
FUICommandList::ConditionalProcessCommandBindings(FKey, bool, bool, bool, bool) const Address = 0x8a2f134  (filename not found) [in UE4Editor-Slate.dylib]
FUICommandList::ProcessCommandBindings(FKeyboardEvent const&) const Address = 0x8a2eafa  (filename not found) [in UE4Editor-Slate.dylib]
FMainFrameActionCallbacks::OnUnhandledKeyDownEvent(FKeyboardEvent const&) Address = 0xadc61f1  (filename not found) [in UE4Editor-MainFrame.dylib]
TBaseStaticDelegateInstance_RetVal_OneParam<FReply, FKeyboardEvent const&>::Execute(FKeyboardEvent const&) const Address = 0xade7ce2  (filename not found) [in UE4Editor-MainFrame.dylib]
FSlateApplication::ProcessKeyDownMessage(FKeyboardEvent&) Address = 0x8a14441  (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::OnKeyDown(int, unsigned int, bool) Address = 0x8a13b52  (filename not found) [in UE4Editor-Slate.dylib]
FMacApplication::ProcessEvent(NSEvent*) Address = 0x414abdb  (filename not found) [in UE4Editor-Core.dylib]
FMacApplication::ProcessDeferredEvents(float) Address = 0x4149324  (filename not found) [in UE4Editor-Core.dylib]
FSlateApplication::Tick() Address = 0x89ff754  (filename not found) [in UE4Editor-Slate.dylib]
FEngineLoop::Tick() Address = 0x3eabdc5  (filename not found) [in UE4Editor]
GuardedMain(wchar_t const*) Address = 0x3eaeab1  (filename not found) [in UE4Editor]
-[UE4AppDelegate applicationDidFinishLaunching:] Address = 0x3eb57bc  (filename not found) [in UE4Editor]
__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__() Address = 0x99f1ce0c (filename not found) [in CoreFoundation]
_CFXNotificationPost() Address = 0x99e10a6d (filename not found) [in CoreFoundation]
-[NSNotificationCenter postNotificationName:object:userInfo:] Address = 0x984417ba (filename not found) [in Foundation]
-[NSApplication _postDidFinishNotification] Address = 0x8d3f0cf9 (filename not found) [in AppKit]
-[NSApplication _sendFinishLaunchingNotification] Address = 0x8d3f0a2c (filename not found) [in AppKit]
-[NSApplication(NSAppleEventHandling) _handleAEOpenDocumentsForURLs:] Address = 0x8d786a1b (filename not found) [in AppKit]
-[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] Address = 0x8d3ed43b (filename not found) [in AppKit]
-[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] Address = 0x9845ff0a (filename not found) [in Foundation]
_NSAppleEventManagerGenericHandler() Address = 0x9845fd7d (filename not found) [in Foundation]
aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) Address = 0x9421fe1f (filename not found) [in AE]
dispatchEventAndSendReply(AEDesc const*, AEDesc*) Address = 0x9421fc32 (filename not found) [in AE]
aeProcessAppleEvent() Address = 0x9421fb36 (filename not found) [in AE]
AEProcessAppleEvent() Address = 0x96856161 (filename not found) [in HIToolbox]
_DPSNextEvent() Address = 0x8d3e9246 (filename not found) [in AppKit]
-[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] Address = 0x8d3e8a2b (filename not found) [in AppKit]
-[NSApplication run] Address = 0x8d3dcb2c (filename not found) [in AppKit]
NSApplicationMain() Address = 0x8d3c7913 (filename not found) [in AppKit]
tchar_main(int, wchar_t**) Address = 0x3eb6036  (filename not found) [in UE4Editor]
main() Address = 0x3eb5a96  (filename not found) [in UE4Editor]
start() Address = 0x987b45fd (filename not found) [in libdyld.dylib]

anonymous_user_33800a51 · June 7, 2014, 1:54pm

Hey piinecone,

Did this happen in 4.1.1, or is this only happening after upgrading to 4.2? Does this happen in every project? Does it happen in a new project?

Could you tell us your system specs? You can find this in About This Mac > More Info.

Thanks!

piinecone · June 9, 2014, 5:45pm

Hey , I will get you all of these details today! I do believe that I only began experiencing this particular crash in 4.2. I have a few more crashes to report that I think are reproducible but I want to verify that first. Would you like me to create separate entries for each? I’m guessing yes since they’re not necessarily related.

anonymous_user_33800a51 · June 9, 2014, 6:16pm

Yes, please create a separate report for each crash if you believe causes to be separate issues. We can always close them out if it turns out they’re related. Thanks!

anonymous_user_33800a51 · June 10, 2014, 7:41pm

Hey piinecone,

I haven’t been able to reproduce this issue, and without a reliable reproduction I’m not sure we can fix it. If you continue to see this happen, can you narrow down steps you take? Thanks!

piinecone · June 10, 2014, 8:09pm

Sure, I will do my best to find repeatable ways so you guys can actually track these down. I know how frustrating it is to try to identify random failures.

piinecone · June 11, 2014, 6:39pm

I’m getting crashes pretty consistently now, like every 10-30 minutes using level editor. It seems to just happen randomly, like if I’m panning around or selecting an actor.

best steps to reproduce I can give you at moment are:

Create a vehicle template project
add/remove/reimport static meshes
Select existing meshes and move them around (ramps, pylons, etc)
Rebuild lighting
Navigate around level with mouse
Select some objects repeatedly
Create a BSP box and use geometry editor to modify it. Make a couple of changes, then Undo them. If you undo them rapidly enough it should crash (that seems to be most consistent way to crash right now).

I don’t feel like I’m performing any commands I shouldn’t be so I’m not sure what to avoid doing. I don’t have any windows open beyond level editor, and my action seem innocuous but they result in a hang, and then I have to force quit editor. I suspect that in those cases crash report isn’t being sent to Epic.

Do any Epic devs use macs full-time? I feel like I can’t be only person experiencing problems on OS X, and my machine is brand new and well cared for (I promise!)

I’m attaching some logs and callstacks from a crash I had last night. I didn’t get anything from most recent crash this morning.

answer hub doesn’t permit *.log files so I’ve put crash reports on my drive, let me know if you can’t access them:

Callstack: https://.com/file/d/0Bx2l50viHIg_Nzlab3lqbnNscVU/edit?usp=sharing
UE .log file: https://.com/file/d/0Bx2l50viHIg_eFBJczV6RXpEV1U/edit?usp=sharing

I also noticed UnrealLightmass process running last night after editor had crashed, so perhaps that had something to do with it?

piinecone · June 11, 2014, 8:49pm

I think you might be able to reproduce level editor crashes reliably on mac like this:

open a project
open a (complex?) blueprint and pin its tab next to level editor
switch blueprint, do some work, enter play mode, etc.
switch back to level editor

At this point, level editor should ‘stick’ for about a second or two (this is where I get nervous that it’s going to crash) and then things will proceed as normal. This pause while switching to level editor didn’t happen in 4.1.1, this seems new as of 4.2. Typically, in another few moments editor will hang and I’ll need to kill process and restart. This seems to be case regardless of whether I do nothing, navigate around scene, or press play; some short amount of time after that pause from switching windows app stalls.

anonymous_user_33800a51 · June 11, 2014, 10:04pm

I’m still not getting it to happen with those steps. Is there a particular project this happens in more often? Can you tell me a one of specific Blueprints opened in one of Marketplace projects that causes this to happen?

And just to be sure: have you edited Source in any way?

piinecone · June 12, 2014, 12:32am

Dang! I haven’t edited this source, I’m using a binary build at moment. I copied project over to my PC and it works without any crashes, though perhaps specific assets are causing crashes on Mac only. What kind of Mac are you using? Maybe I need to reconfigure something on my machine.

What’s best way for me to export my assets so that you can test them out?

anonymous_user_33800a51 · June 12, 2014, 3:14pm

Mac I use here is not much different than yours:

MacBook Pro, Retina Late 2013
OS: Mac OS X 10.9.3
PROCESSOR: 2.3 GHz Intel Core i7
MEMORY: 16GB RAM 1600 MHz DDR3
GRAPHICS: Intel Iris Pro / NVIDIA GeForce GT 750M

If you would like to upload some test assets for me, I’d be happy to try it out with them. You can them up and attach them here, or upload them somewhere I can get to and I’ll download them (so long as no special program or login is needed).

Do you believe specific assets are causing crashes? If this happens in a new project without any specific assets, that seems unlikely. If you haven’t already tried opening a new project and messing with that for a bit (without using assets imported from your other projects), please do. Without a reproduction in that case, then we’ve narrowed it down significantly.

piinecone · June 18, 2014, 8:06pm

Hey , sorry for my disappearance. Here’s a link to download assets: https://s3.amazonaws.com/piinecone/hovercraft/Hovercraft_b50c7a4.

Oddly enough, I actually finished that project up on my PC, then thumb drived it over to my Mac in order to issue a build and push it to github. Now I can’t open it on my PC anymore. I created a separate report, but perhaps two are related? I don’t know!

In any case, here’s other report: Editor crash on launch after copying project from OSX to Windows 8 - Programming & Scripting - Epic Developer Community Forums

anonymous_user_33800a51 · June 18, 2014, 10:42pm

Hey piinecone,

I’m sorry, but even after importing your project and testing it ways you have suggested, I am still not experiencing any slowdown or crashes.

Just to eliminate possibility that it’s strictly project or an asset within project, can you start a new project on your Mac and play with it for a bit? Please do so without importing any of these assets. If you can confirm that there’s no issue there, then at least we can narrow it down to this project. Thanks!

piinecone · June 18, 2014, 11:05pm

Weird! Maybe it was just a bad day for my macbook? Perplexing. I swear I’m not just out to waste your time driving around in a glitchy hovercraft.

piinecone · June 18, 2014, 11:06pm

Are you able to reproduce this one (issue with PC/windows)? Editor crash on launch after copying project from OSX to Windows 8 - Programming & Scripting - Epic Developer Community Forums

It’s same exact that works on OS X.

anonymous_user_33800a51 · June 19, 2014, 8:18pm

I’ll take a look at that today if I can. We’re not able to help much with utilities that aren’t officially supported, and it sounds like that crash is a result of utility you put together.

Have you gotten a chance to test issue out in a fresh project on your Mac?

piinecone · June 19, 2014, 8:59pm

I sorted it out, it was related to S3 download. I’ll update that report with an answer in case anyone else is syncing files with S3.

I haven’t had a chance to test out a fresh project yet, I’ll try to do that today.

anonymous_user_33800a51 · June 19, 2014, 9:01pm

Awesome, glad you got that sorted. Thanks!

anonymous_user_33800a51 · June 25, 2014, 6:25pm

Hey piinecone,

Just wanted to check in and see if you had a chance to play around with a fresh project. Let us know if you have, and which specific actions cause a crash in new project if you can. Thanks!

piinecone · June 25, 2014, 7:22pm

I haven’t had a chance, but I will definitely try.

Right now I’m crashing about every 30 minutes on my Mac while working with blueprints. Not exactly sure how to report crashes – it’s just average maneuvers, like dragging a node or deleting a local variable. I crash every time when deleting a local variable from a certain function, but I’m sure that will succeed in a fresh project. It seems like a totally valid action though, and I keep losing work.

Here’s a callstack: https://s3.amazonaws.com/piinecone/crash/ue4_blueprint_callstack.rtf

I also get this a lot after crashing:

at which point I have to find UE4editor pid and kill -9 it.