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In Progress

Under Consideration for 2021.3.X, 2022.3.X

Fix In Review for 6000.0.7f1



Found in





Issue ID




[IOS] Crash on "il2cpp::gc::GCHandle::Free" when App returns to foreground



How to reproduce:
1. Open the Project attached in the Google Drive in the comments
2. Build the Project for iOS
3. Edit the method "applicationWillEnterForeground" in "<Path_To_Xcode_Project>/Classes/" to the version provided in the comments
4. Build and Run the Xcode Project
5. In the Build tap the Green Play button
6. Enter level 101 (detailed steps described in the comments)
7. Tap the red pause Button in the top right of the screen
8. Tap the red home Button in the pop-up
9. Put the App into the background
10. Return to the App
11. If the crash does not occur, relaunch the app and repeat from step 5

Reproducible with: 2022.3.30f1
Could not test with: 2021.3.38f1, 6000.0.2f1 (Updating the Project causes multiple errors to appear)

Reproduced on:
- iPhone 13 Pro (iOS 16.6.1)
- iPhone 13 (iOS 15.0)
- iPad Pro (9.7 inch, WiFi) (iOS 14.8)
- iPad 6th Gen (iOS 17.2)
Could not test on:
- iPhone 7 Plus (iOS 14.6) (a different crash prevents testing)

First lines of the stack trace:
* thread #1, queue = '', stop reason = EXC_BAD_ACCESS (code=1, address=0x157e16184)
* frame #0: 0x000000012a405b10 UnityFramework`il2cpp::gc::GCHandle::Free(gchandle=<unavailable>) at GCHandle.cpp:278:38 [opt]
frame #1: 0x000000011fba4ed4 UnityFramework`::ReleaseAndClear() [inlined] Release at ScriptingTypes.cpp:52:9 [opt]
frame #2: 0x000000011fba4ec8 UnityFramework`::ReleaseAndClear() at ScriptingTypes.cpp:59:5 [opt]
frame #3: 0x000000011fa15220 UnityFramework`::~NativePlayerLoopSystem() at PlayerLoop.cpp:106:26 [opt]
frame #4: 0x000000011fa13544 UnityFramework`::clear_dealloc() [inlined] ~NativePlayerLoopSystem at PlayerLoop.cpp:105:5 [opt]

- When the crash does not occur, a black screen is shown instead
- Usually crashes on the third attempt to reproduce

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