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Fixed in 2021.1.X

Fixed in 2019.4.X, 2020.2.X



Found in





Issue ID




[iOS] Crash on il2cpp::vm::LivenessState::AddProcessObject when using Social.LoadUsers and then changing scenes



Reproduction steps:
1. Open attached project "Case_1270230"
2. Build and deploy the app to a device
3. In the build click the button labeled "Step 1."
4. Click the buttons "Step 2.", "Step 3." and "Step 4." in that order
5. Click the button "Step 5."
6. If the crash does not occur, repeat from the 4th reproduction step

Reproduces on: 2019.4.2f1, 2019.4.13f1, 2020.1.0a5, 2020.1.11f1, 2020.2.0b8
Not reproducible with: 2018.4.28f1, 2019.4.1f1, 2020.1.0a4
Could not test with: 2021.1.0a3 (app crashes upon clicking any of the buttons)

First lines of the stack trace:
* frame #0: 0x0000000102dcd9cc UnityFramework`il2cpp::vm::LivenessState::AddProcessObject(object=0x0000000200000000, state=0x000000010dd136c0) at Liveness.cpp:336:24 [opt]
frame #1: 0x0000000102dcd708 UnityFramework`il2cpp::vm::LivenessState::TraverseGCDescriptor(object=0x00000001078a14e8, state=0x000000010dd136c0) at Liveness.cpp:211:17 [opt]
frame #2: 0x0000000102dcd570 UnityFramework`il2cpp::vm::LivenessState::TraverseObjects(this=0x000000010dd136c0) at Liveness.cpp:148:13 [opt]
frame #3: 0x0000000102dcde50 UnityFramework`il2cpp::vm::Liveness::FromStatics(state=0x000000010dd136c0) at Liveness.cpp:491:25 [opt]
frame #4: 0x0000000102459238 UnityFramework`::GarbageCollectSharedAssets() [inlined] MarkManagedStaticVariableRoots at GarbageCollectSharedAssets.cpp:633:5 [opt]

1. The issue requires Social.LoadUsers() to return at least one user
2. Usually crashes within 10 tries to change the Scene

Reproducible with:
iPhone 6 (iOS 12.4.8)
iPhone 7 (iOS 12.3.1)

  1. Resolution Note (fix version 2021.1):

    Fixed in: 2021.1.0a9

  2. Resolution Note (fix version 2020.2):

    Fixed in: 2020.2.0b13

  3. Resolution Note (fix version 2019.4):

    Fixed in 2019.4.19f1

Comments (4)

  1. Firemaw

    Dec 21, 2020 06:19

    Thank you for logging, I am getting this on Unity 2019.4.15 and couldn't figure out why

  2. kilicbatuhan1205

    Dec 11, 2020 11:19

    This bug actually breaks my game, since I load the users on startup, the game always crashes whenever you try to switch the scene. I hope it's fixed in the next 2019 LTS.

  3. psjcap_unity

    Oct 29, 2020 06:35

    It also happens on Android armv7 processor.

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