Issue with release build using il2cpp

[renanliberato]

Bug report

I'm not familiar with this kind of error in Unity... Is it something that can be "worked around" when using the library?
I could run it when building for Android using Mono, but it might be a limitation for people who needs to generate 64 bits APK or HTML5 versions.

Besides that, thanks for the lib! I'm using it to study ECS so not worried much about it.. I'll try to investigate also for learning porpuses and update here later.

Environment

• Versions
  Unity 2019.4.15f1
  TinyECS v0.4.15

• Platform
  HTML5, Android

• Compiler
  IL2CPP

• Hardware
  Windows PC

Steps to reproduce the issue

• Add the library source code
• Remove the TinyECSUnityIntegrationEditor folder (I could not make the release compilation work with it - unity play button works)
• Create a Scene using a Static View component and DynamicView component
• Switch the project to HTML5
• Build a release version.
• Open it in a browser.

What's the expected result?

• Systems would run as usual and views updated

What's the actual result?

As soon as the app loads, I get this error:

ExecutionEngineException: Attempting to call method 'TinyECS.Impls.ComponentManager::AddComponent<TinyECSUnityIntegration.Impls.TOnViewWaitForInitEventComponent>' for which no ahead of time (AOT) code was generated.
(Filename: currently not available on il2cpp Line: -1)

Additional details / screenshot

• I'm using also the ".NET 4.x scripting runtime version" as suggested on the README.
• This repository is the one I was trying to build using IL2CPP

[bnoazx005]

Thanks for your report! I will try to check this problem as soon as possible. For now it looks like incompatibility between Unity's il2cpp and the library.

UPD. Could you please add information about which version of Unity and TinyECS have you used?

[renanliberato]

Sure!
I'm on:

• Unity 2019.4.15f1
• TinyECS v0.4.15

[renanliberato]

Hmm, it seems that IL2CPP does not like generic methods with structs (look the last commet): https://forum.unity.com/threads/any-workaround-for-il2cpp-aot-generic-virtual-methods-and-explicit-interfaces.876664/

I did a mass find/replace on components and component methods replacing structs to classes, and then the build worked.

Still superficial and not the best solution, I think, but at least it is some info =P

[bnoazx005]

Thanks for the link, will read this later.

Also I've tried to make a WebGL build with latest version of the library and no errors have happened. Did you use dynamic libraries or just copy sources into your project? Remember that dll with editor's stuffs should be placed in Editor/ directory.

About the solution below: it could be used as temporary hack. For now I suppose to introduce conditional compilation to disable generic methods and replace them with simple arguments.

[renanliberato]

I used the Unity 2D mobile template to initially setup the project, which might change some settings (I noticed it added an editor plugin, so might also have changed something more). I downloaded and copied the sources to learn with the codebase (unity complained about the AssemblyInfo.cs file, so I deleted it). Also, I deleted the TinyECS Editor sources before building, because unity was also complaining about it 😅 Hmm, I'll try to make a minimum repo with the error. Talking to you here I noticed I did some tweaks along the way not direclty related to the IL2PP thing.

…

On Tue, Jun 15, 2021, 10:48 Ildar Kasimov ***@***.***> wrote: Thanks for the link, will read this later. Also I've tried to make a WebGL build with latest version of the library and no errors have happened. Did you use dynamic libraries or just copy sources into your project? Remember that dll with editor's stuffs should be placed in *Editor/* directory. About the solution below: it could be used as temporary hack. For now I suppose to introduce conditional compilation to disable generic methods and replace them with simple arguments. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#33 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADU2XCQ6GEEWOEXGQW7I4LLTS5K2PANCNFSM46WGLC7Q> .