2D Animation package SpriteSkin memory leak in SpriteSkin:CopyToSpriteSkinData

Unity Engine
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1

Hello, I am using unity 2022.3.10f. I have installed 2D Animation, Burst and Jobs packages. I have a rigged 2D characters. Batching seem to work fine and performance is great, but from time to time I get a memory leak message in Unity Editor.

It goes something like “Leak Detected : Persistent allocates 1 individual allocations.”. Sometimes it is 1 individual allocations, sometimes it is 30.

I enabled leak detection with stack trace and traced the problem to the UnityEngine.U2D.Animation.SpriteSkin and the method CopyToSpriteSkinData.

Here is the full stack

Found 1 leak(s) from callstack:
#0  (Mono JIT Code) [SpriteSkin.cs:608] UnityEngine.U2D.Animation.SpriteSkin:CopyToSpriteSkinData (UnityEngine.U2D.Animation.SpriteSkinData&,int)
#1  (Mono JIT Code) [SpriteSkinComposite.cs:521] UnityEngine.U2D.Animation.SpriteSkinComposite:LateUpdate ()
#2  (Mono JIT Code) [SpriteSkinUpdateHelper.cs:30] UnityEngine.U2D.Animation.SpriteSkinUpdateHelper:LateUpdate ()
#3 mono_jit_runtime_invoke
#4 do_runtime_invoke
#5 mono_runtime_invoke
#6 scripting_method_invoke(ScriptingMethodPtr, ScriptingObjectPtr, ScriptingArguments&, ScriptingExceptionPtr*, bool)
#7 ScriptingInvocation::Invoke(ScriptingExceptionPtr*, bool)
#8 MonoBehaviour::CallMethodIfAvailable(int)
#9 MonoBehaviour::CallUpdateMethod(int)
#10 void BaseBehaviourManager::CommonUpdate<LateBehaviourManager>()
#11 LateBehaviourManager::Update()
#12 InitPlayerLoopCallbacks()::PreLateUpdateScriptRunBehaviourLateUpdateRegistrator::Forward()
#13 ExecutePlayerLoop(NativePlayerLoopSystem*)
#14 ExecutePlayerLoop(NativePlayerLoopSystem*)
#15 PlayerLoop()
#16 EditorPlayerLoop::Execute()
#17 PlayerLoopController::InternalUpdateScene(bool, bool)
#18 ???
#19 ???

Can someone give further information about this leak? Is there a way to fix the problem?

2

I have SpriteSkin memory leaks too.

Found 14 leak(s) from callstack:
0x000001a709a73c73 (Mono JIT Code) Unity.Collections.NativeArray1:Allocate (int,Unity.Collections.Allocator,Unity.Collections.NativeArray1&)
0x000001a709a738c3 (Mono JIT Code) Unity.Collections.NativeArray`1:.ctor (int,Unity.Collections.Allocator,Unity.Collections.NativeArrayOptions)
0x000001a709a6eab3 (Mono JIT Code) UnityEngine.U2D.Animation.SpriteSkin:CacheBoneTransformIds (bool) (at ./Library/PackageCache/com.unity.2d.animation@9.0.3/Runtime/SpriteSkin.cs:327)
0x000001a709b6682b (Mono JIT Code) UnityEngine.U2D.Animation.SpriteSkin:CopyToSpriteSkinData (UnityEngine.U2D.Animation.SpriteSkinData&,int) (at ./Library/PackageCache/com.unity.2d.animation@9.0.3/Runtime/SpriteSkin.cs:607)
0x000001a709b664db (Mono JIT Code) UnityEngine.U2D.Animation.SpriteSkinComposite:CopyToSpriteSkinData (int) (at ./Library/PackageCache/com.unity.2d.animation@9.0.3/Runtime/SpriteSkinComposite.cs:388)
0x000001a709b58f9b (Mono JIT Code) UnityEngine.U2D.Animation.SpriteSkinComposite:BatchRemoveSpriteSkins () (at ./Library/PackageCache/com.unity.2d.animation@9.0.3/Runtime/SpriteSkinComposite.cs:680)
0x000001a70b435e5b (Mono JIT Code) UnityEngine.U2D.Animation.SpriteSkinComposite:LateUpdate () (at ./Library/PackageCache/com.unity.2d.animation@9.0.3/Runtime/SpriteSkinComposite.cs:520)
0x000001a70b430263 (Mono JIT Code) UnityEngine.U2D.Animation.SpriteSkinUpdateHelper:LateUpdate () (at ./Library/PackageCache/com.unity.2d.animation@9.0.3/Runtime/SpriteSkinUpdateHelper.cs:29)
0x000001a7092f4c78 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_voidthis (object,intptr,intptr,intptr)
0x00007ffdd4c5e084 (mono-2.0-bdwgc) mono_jit_runtime_invoke (at C:/build/output/Unity-Technologies/mono/mono/mini/mini-runtime.c:3445)
0x00007ffdd4b9eb84 (mono-2.0-bdwgc) do_runtime_invoke (at C:/build/output/Unity-Technologies/mono/mono/metadata/object.c:3066)
0x00007ffdd4b9ed1c (mono-2.0-bdwgc) mono_runtime_invoke (at C:/build/output/Unity-Technologies/mono/mono/metadata/object.c:3113)
0x00007ff7a72b0b14 (Unity) scripting_method_invoke
0x00007ff7a728f794 (Unity) ScriptingInvocation::Invoke
0x00007ff7a7276db4 (Unity) MonoBehaviour::CallMethodIfAvailable
0x00007ff7a7276eda (Unity) MonoBehaviour::CallUpdateMethod
0x00007ff7a6d1219b (Unity) BaseBehaviourManager::CommonUpdate
0x00007ff7a6d1981a (Unity) LateBehaviourManager::Update
0x00007ff7a6f493ad (Unity) InitPlayerLoopCallbacks’::2’::PreLateUpdateScriptRunBehaviourLateUpdateRegistrator::Forward

3

I am getting the same message, is there any solution or thoughts on this?

4

Unity 2023.3.15f. Got the same leak information.

5

Same for me.

6

Thank you for reporting this. It’s a known issue and will be fixed in the next release of the 2D Animation package.
For Unity 22.3 stream it will be 9.1.1 and for Unity 23 10.1.2.