iOS EXC_BAD_ACCESS Crash

silentslack · February 17, 2022, 9:27am

Hi,

I’m running into a show stopping crash on iOS. Unity 2020.3.25f1. Trying to load scene using SceneManager.LoadScene() - even a empty scene is crashing with this stack trace:

#include <UnityFramework/UnityFramework.h>

UnityFramework* UnityFrameworkLoad()
{
    NSString* bundlePath = nil;
    bundlePath = [[NSBundle mainBundle] bundlePath];
    bundlePath = [bundlePath stringByAppendingString: @"/Frameworks/UnityFramework.framework"];

    NSBundle* bundle = [NSBundle bundleWithPath: bundlePath];
    if ([bundle isLoaded] == false) [bundle load];

    UnityFramework* ufw = [bundle.principalClass getInstance];
    if (![ufw appController])
    {
        // unity is not initialized
        [ufw setExecuteHeader: &_mh_execute_header];
    }
    return ufw;
}

int main(int argc, char* argv[])
{
    @autoreleasepool
    {
        id ufw = UnityFrameworkLoad();
        [ufw runUIApplicationMainWithArgc: argc argv: argv];
        return 0;
    }
}

* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x132)
    frame #0: 0x0000000101df7988 UnityFramework`il2cpp::vm::Type::IsStruct(Il2CppType const*) + 88
    frame #1: 0x0000000101de6df4 UnityFramework`il2cpp::vm::LivenessState::FieldCanContainReferences(FieldInfo*) + 24
    frame #2: 0x0000000101de70e4 UnityFramework`il2cpp::vm::Liveness::FromStatics(void*) + 160
    frame #3: 0x000000010141dd84 UnityFramework`GarbageCollectSharedAssets(bool, bool) + 1360
    frame #4: 0x000000010142d224 UnityFramework`UnloadUnusedAssetsOperation::IntegrateMainThread() + 28
    frame #5: 0x000000010142c48c UnityFramework`PreloadManager::UpdatePreloadingSingleStep(PreloadManager::UpdatePreloadingFlags, int) + 224
    frame #6: 0x000000010142cbb4 UnityFramework`PreloadManager::WaitForAllAsyncOperationsToComplete() + 212
    frame #7: 0x000000010141ec68 UnityFramework`ExecutePlayerLoop(NativePlayerLoopSystem*) + 100
    frame #8: 0x000000010141eca8 UnityFramework`ExecutePlayerLoop(NativePlayerLoopSystem*) + 164
    frame #9: 0x000000010141ef74 UnityFramework`PlayerLoop() + 272
    frame #10: 0x0000000101906c58 UnityFramework`UnityPlayerLoopImpl(bool) + 112
    frame #11: 0x0000000100ecd928 UnityFramework`-[UnityAppController(Rendering) repaint] + 108
    frame #12: 0x0000000100ecd890 UnityFramework`-[UnityAppController(Rendering) repaintDisplayLink] + 108
    frame #13: 0x0000000185e797b8 QuartzCore`CA::smile:isplay::smile:isplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) + 672
    frame #14: 0x0000000185f587f4 QuartzCore`display_timer_callback(__CFMachPort*, void*, long, void*) + 280
    frame #15: 0x0000000182b680e0 CoreFoundation`__CFMachPortPerform + 176
    frame #16: 0x0000000182b8d908 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 60
    frame #17: 0x0000000182b8cc88 CoreFoundation`__CFRunLoopDoSource1 + 596
    frame #18: 0x0000000182b8686c CoreFoundation`__CFRunLoopRun + 2372
    frame #19: 0x0000000182b859f4 CoreFoundation`CFRunLoopRunSpecific + 600
    frame #20: 0x000000019a25b734 GraphicsServices`GSEventRunModal + 164
    frame #21: 0x000000018560475c UIKitCore`-[UIApplication _run] + 1072
    frame #22: 0x0000000185609fcc UIKitCore`UIApplicationMain + 168
    frame #23: 0x0000000100ecd374 UnityFramework`-[UnityFramework runUIApplicationMainWithArgc:argv:] + 108
  * frame #24: 0x0000000100ae3e1c LuloClientTabatinga`main(argc=<unavailable>, argv=<unavailable>) at main.mm:26:9 [opt]
    frame #25: 0x0000000182841cf8 libdyld.dylib`start + 4

I’ve tried almost everything and can’t get LoadScene to work. If I start the app with the target scene it is fine - it seems it is the call to SceneManager.LoadScene()…

silentslack · February 18, 2022, 3:27am

I have tried:

In XCode setting ‘optimization’ to None
Adding '-mno-thumb ’ flag: Unity - Manual: Troubleshooting on iOS devices
Adding ‘yield return new WaitForEndOfFrame()’ on SceneLoad: Unity - Manual: Troubleshooting on iOS devices
Removing ‘Strip engine code’ in project settings: Xcode Error when building - Thread 1: EXC_BAD_ACCESS
Setting Development Build to true
Reducing to .NET Standard 2.0
Adding false to my managed plugins
Nuking the ‘Library’ folder and rebuilding

silentslack · February 22, 2022, 1:18pm

Sorry to bump this but still haven’t got anywhere with this. Any pointers for things I could try to debug and provide more details? If the app crashes on SceneManager.LoadScene() for a blank scene, doesn’t that suggest there is something wrong with that Unity function directly?

JeffDUnity3D · February 22, 2022, 9:58pm

Have you updated to the latest XCode? You mention 2020.3.25f1, have you tried with other Unity versions? And you mention it happens with a new/empty project with just this minimal code? If so, you’ll want to open a bug report. Please share the specific code you are using in a new project.

silentslack · February 24, 2022, 6:12am

@JeffDUnity3D thank you for the help. XCode is the latest from the AppStore. I have only tried on 2020.3.25f1 - I will try updating to the latest on 2020 LTS. Thanks.

silentslack · February 24, 2022, 7:10am

Ok updated to 2020.3.29 and the same issue:

Just tested on Android and all seems ok - just iOS.

manurocker95 · March 9, 2022, 9:22pm

Did you fix that? Getting same crash on 2021.2.14f1…

silentslack · March 17, 2022, 8:35am

@manurocker95 sorry just getting back to you, I’ve yet to fix but was distracted by other projects. Any luck on your end?

manurocker95 · March 17, 2022, 11:16am

Nope, still wondering wth happens because I thought it was some scripts with singleton pattern I made (in case the static instances broke xcode somehow) but after deleting those it continued happening so…

Could it be Unity bug?

soom5119 · May 23, 2022, 3:35am

Did you have solved this issue?

manurocker95 · May 25, 2022, 10:09am

Nope, I reported the bug and Unity said they couldn’t reproduce it…

amonraduyev · June 2, 2022, 8:39pm

Did somebody fix it? We’ve been working on more than a week but we can not find any solution.

manurocker95 · June 3, 2022, 9:07am

My report was successfully “confirmed” yesterday, so the fix should be on the go

amonraduyev · June 3, 2022, 12:03pm

Well, we tried a device build and there are no errors! But still occures in simulator builds.

In my case my Mac is M1 so I installed Unity 2021.3.3f1(m1) version and opened project with this version.
(If you have) Uninstalled firebase from project and reimported.
In XCode go to UnityFrameWork-General press “+” and add GameKit.
Update Xcode latest version.
Update device latest version.

KingKRoecks · June 14, 2022, 11:47pm

Seems to happen as well for me.

2021.3.2f1
All default settings; “Run in Xcode = Latest, Run in Xcode as = Release”
Exporting for Simulator SDK in Player Settings
Application crashes at start-up when running from Xcode

aurasstudios · June 17, 2022, 4:19am

Can you please share your bug report case id number so we can all keep a watch for the fix.
Thank you.

sanathkukkillaya · June 22, 2022, 2:59pm

@KingKRoecks Did you find any workaround for this? I am also facing this issue and need a simulator build for Facebook approval.

@manurocker95 Can you let us know if you found any solution for this or if Unity fixed your issue?

Klausast · June 23, 2022, 8:41am

Could you please share link to that report?

manurocker95 · June 23, 2022, 10:05am

Unity Issue Tracker - [iOS] EXC_BAD_ACCESS crash when deploying to iOS 15 (unity3d.com)

manurocker95 · June 23, 2022, 10:06am