MeshInstanceRenderer not Rendering on iOS

I get a following stacktraces whenever I try to run my game on iOS:

Code (CSharp):

1. (Filename: currently not available on il2cpp Line: -1)
2.  
3. MissingMethodException: Constructor on type 'Unity.Rendering.MeshInstanceRendererSystem' not found.
4.   at System.RuntimeType.CreateInstanceImpl (System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, System.Object[] args, System.Globalization.CultureInfo culture, System.Object[] activationAttributes, System.Threading.StackCrawlMark& stackMark) [0x00000] in <00000000000000000000000000000000>:0
5.   at System.Activator.CreateInstance (System.Type type, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, System.Object[] args, System.Globalization.CultureInfo culture, System.Object[] activationAttributes) [0x00000] in <00000000000000000000000000000000>:0
6.   at System.Activator.CreateInstance (System.Type type, System.Object[] args) [0x00000] in <00000000000000000000000000000000>:0
7.   at Unity.Entities.World.CreateManagerInternal (System.Type type, System.Object[] constructorArguments) [0x00000] in <00000000000000000000000000000000>:0
8.   at Unity.Entities.World.GetOrCreateManagerInternal (System.Type type) [0x00000] in <00000000000000000000000000000000>:0
9.   at Unity.Entities.World.GetOrCreateManager[T] () [0x00000] in <00000000000000000000000000000000>:0
10.   at Systems.Inputs.ArInputSystem.OnUpdate (Unity.Jobs.JobHandle inputDeps) [0x00000] in <00000000000000000000000000000000>:0
11.   at Unity.Entities.JobComponentSystem.InternalUpdate () [0x00000] in <00000000000000000000000000000000>:0
12.   at Unity.Entities.ScriptBehaviourManager.Update () [0x00000] in <00000000000000000000000000000000>:0
13.   at Unity.Entities.ScriptBehaviourUpdateOrder+DummyDelagateWrapper.TriggerUpdate () [0x00000] in <00000000000000000000000000000000>:0
14.   at UnityEngine.Experimental.LowLevel.PlayerLoopSystem+UpdateFunction.Invoke () [0x00000] in <00000000000000000000000000000000>:0

When I run it on Android everything works perfectly fine

 

It's being stripped due to IL2CPP. If you used IL2CPP on android you'd have the same issue (actually this is why I promote using IL2CPP for android/iOS, it makes it so you have the same issues on both platforms rather than running into 2 separate set of issues you have to deal wtih.)

Either make a direct reference or setup a link.xml
https://docs.unity3d.com/Manual/IL2CPP-BytecodeStripping.html

(This is something I hope Unity addresses and fixes because having to deal with 3rd party libraries being stripped is very annoying.)

 

I wonder how to make the constructor not stripped? You have to `new` them all at some point with all possible overloads? (becuase system code is not supposed to be new-ed at any point, using manual world also uses activator for the create instance)

*also you can use [Preserve] on a per system basis https://docs.unity3d.com/ScriptReference/Scripting.PreserveAttribute.html

 

@tertle @5argon Thank you! That was the cause. I now switched to IL2CPP also on Android to not have any differences between platforms.

For now I just added this rule to link.xml:

Code (CSharp):

1.     <assembly fullname="Unity.Rendering.Hybrid" preserve="all"/>
2.  

Is there any way to look up the final classes present after IL2CPP stripping? Professionally I work as an Android dev and we often run into similar issues with proguard there. On Android I am able to easily check what classes are in the final .apk file though