Bug Il2Cpp development build fails since Unity 2020.2

After upgrading from Unity 2020.1.3f1 to Unity 2020.2.2f1, Standalone Windows and Switch builds are failing with the following exception only when Development Build is enabled:

Code (CSharp):

1. Exception: Failed running C:\Program Files\Unity\Hub\Editor\2020.2.2f1\Editor\Data\il2cpp/build/BeeSettings/offline/bee.exe --useprebuiltbuildprogram --no-colors
2.  
3. stdout:
4. [             ] Require frontend run.  tundra.dag no longer valid. FileSignature timestamp changed: il2cpp_settings.json
5. [        0s] Executed build program. Created build graph with 2 nodes.
6. [           0s] Freezing tundra.dag.json into .dag (.dag file didn't exist)
7. [BUSY       6s] Il2Cpp .../Library/Il2cppBuildCache/Windows/x64/Native/GameAssembly.dll
8. ...
9. [BUSY     526s] Il2Cpp .../Library/Il2cppBuildCache/Windows/x64/Native/GameAssembly.dll
10. stderr:
11. tundra: error: Out of memory in linear allocator: dynamicOutputDirectories
12.  
13. UnityEditorInternal.Runner.RunProgram (UnityEditor.Utils.Program p, System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser) (at <433cbae83977409887e43d50043210d2>:0)
14. UnityEditorInternal.Runner.RunManagedProgram (System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser, System.Action`1[T] setupStartInfo) (at <433cbae83977409887e43d50043210d2>:0)
15. UnityEditorInternal.IL2CPPBuilder.RunIl2CppWithArguments (System.Collections.Generic.List`1[T] arguments, System.Action`1[T] setupStartInfo, System.String generatedCppOutputDirectory) (at <433cbae83977409887e43d50043210d2>:0)
16. UnityEditorInternal.IL2CPPBuilder.ConvertPlayerDlltoCpp (UnityEditor.Il2Cpp.Il2CppBuildPipelineData data, System.String outputDirectory, System.Boolean platformSupportsManagedDebugging) (at <433cbae83977409887e43d50043210d2>:0)
17. UnityEditorInternal.IL2CPPBuilder.Run () (at <433cbae83977409887e43d50043210d2>:0)
18. UnityEditorInternal.IL2CPPUtils.RunIl2Cpp (System.String stagingAreaData, UnityEditorInternal.IIl2CppPlatformProvider platformProvider, System.Action`1[T] modifyOutputBeforeCompile, UnityEditor.RuntimeClassRegistry runtimeClassRegistry) (at <433cbae83977409887e43d50043210d2>:0)
19. DesktopStandalonePostProcessor.RunIL2CPP (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditorInternal.IIl2CppPlatformProvider il2cppPlatformProvider, System.Collections.Generic.List`1[T] cppPlugins) (at <433cbae83977409887e43d50043210d2>:0)
20. DesktopStandalonePostProcessor.SetupStagingArea (UnityEditor.Modules.BuildPostProcessArgs args, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at <433cbae83977409887e43d50043210d2>:0)
21. DesktopStandalonePostProcessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at <433cbae83977409887e43d50043210d2>:0)
22. Rethrow as BuildFailedException: Exception of type 'UnityEditor.Build.BuildFailedException' was thrown.
23. DesktopStandalonePostProcessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at <433cbae83977409887e43d50043210d2>:0)
24. UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <433cbae83977409887e43d50043210d2>:0)
25. UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at <433cbae83977409887e43d50043210d2>:0)
26. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)
27.  

I also tested 2021.1.0f1 since there's been a few il2cpp fixes but it yielded the same result.

So after a lot of debugging, I noticed that the build fails as soon as the native GameAssembly.dll goes above 1GB. Our project is getting large and generates a lot of code from generics, so that might be a problem. In release, our GameAssembly.dll weights around 146 MB so it works fine but still, I'd like to know if that's an intended limitation and if there's any possible fix or workaround?

In the meantime, I'm trying to figure out a way to reduce our code size but it's not trivial.

Thanks.

 

Hey,

This seems to be a known issue that was caught and fixed a few months ago, but maybe the fix hasn't made it to an official release yet (checking around on this), or it could be something else.

Regardless, could you please file a bug for this issue so it can be tracked?

 

I won't be able to submit a repro project though, but I'll file a bug.
Thanks.

 

I'm having the same problem.
I haven't verified it exactly, but it seems to occur when the size of the compiled script exceeds 1GB.

The fix was not included in 2021.1.4f1.
When is the fix scheduled to be released?

 

The bug is being tracked by this internal case number: 1327846 but there doesn't appear to be a valid public link.

From the current status: the bug has been fixed within IL2CPP branch but doesn't appear to have made it's way to a release branch yet. However, the bug has been "escalated" by a studio, and so it should make it's way to a 2020 LTS release soon.

Feel free to file another bug, you might be able to get better updates on it.

 

This issue seems to have been fixed by Unity 2021.1.10f1

In fact, we successfully built a large Unity project that had failed to build in the previous version.

 

I have an issue that seems kind of related to this topic. In Unity 2020.3 and 2021.1.10-14 when trying to build a project with IL2CPP I get an error:

Code (CSharp):

1. Exception: Failed running C:\Program Files\Unity\Hub\Editor\2021.1.14f1\Editor\Data\il2cpp/build/BeeSettings/offline/bee.exe --no-colors --prebuiltbuildprogram="C:\Program Files\Unity\Hub\Editor\2021.1.14f1\Editor\Data\il2cpp/build/BeeSettings/offline/artifacts/buildprogram/buildprogram.exe"
2.  
3. stdout:
4. [             ] Require frontend run.  artifacts\tundra.dag.json does not exist yet
5. error: Value cannot be zero.
6. Parameter name: executableStringFor (System.ArgumentNullException)
7.   at Bee.Core.Backend.AddAction
8.   at Build+Il2Cpp.AddAction
9.   at Build.Main
10.   at System.RuntimeMethodHandle.InvokeMethod
11.   at Bee.StandaloneBeeDriver.CreateBuildGraph
12.   at Bee.StandaloneBeeDriver.InvokeTundra
13.   at Bee.StandaloneBeeDriver.BuildMain
14.   at Bee.StandaloneBeeDriver.Main
15. stderr:
16.  
17. UnityEditorInternal.Runner.RunProgram (UnityEditor.Utils.Program p, System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser) (at <f9051bbfec05422cad88da502b7617ba>:0)
18. UnityEditorInternal.Runner.RunManagedProgram (System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser, System.Action`1[T] setupStartInfo) (at <f9051bbfec05422cad88da502b7617ba>:0)
19. UnityEditorInternal.IL2CPPBuilder.RunIl2CppWithArguments (System.Collections.Generic.List`1[T] arguments, System.Action`1[T] setupStartInfo) (at <f9051bbfec05422cad88da502b7617ba>:0)
20. UnityEditorInternal.IL2CPPBuilder.ConvertPlayerDlltoCpp (UnityEditor.Il2Cpp.Il2CppBuildPipelineData data) (at <f9051bbfec05422cad88da502b7617ba>:0)
21. UnityEditorInternal.IL2CPPBuilder.Run () (at <f9051bbfec05422cad88da502b7617ba>:0)
22. UnityEditorInternal.IL2CPPUtils.RunIl2Cpp (System.String stagingAreaData, UnityEditorInternal.IIl2CppPlatformProvider platformProvider, System.Action`1[T] modifyOutputBeforeCompile, UnityEditor.RuntimeClassRegistry runtimeClassRegistry) (at <f9051bbfec05422cad88da502b7617ba>:0)
23. DesktopStandalonePostProcessor.RunIL2CPP (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditorInternal.IIl2CppPlatformProvider il2cppPlatformProvider, System.Collections.Generic.List`1[T] cppPlugins) (at <f9051bbfec05422cad88da502b7617ba>:0)
24. DesktopStandalonePostProcessor.SetupStagingArea (UnityEditor.Modules.BuildPostProcessArgs args, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at <f9051bbfec05422cad88da502b7617ba>:0)
25. DesktopStandalonePostProcessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at <f9051bbfec05422cad88da502b7617ba>:0)
26. Rethrow as BuildFailedException: Exception of type 'UnityEditor.Build.BuildFailedException' was thrown.
27. DesktopStandalonePostProcessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at <f9051bbfec05422cad88da502b7617ba>:0)
28. UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <f9051bbfec05422cad88da502b7617ba>:0)
29. UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at <f9051bbfec05422cad88da502b7617ba>:0)
30. UnityEngine.GUIUtility:processEvent(Int32, IntPtr, Boolean&)

 

Well, il2cpp_settings.json is simply empty. Here are the contents:
|

Code (CSharp):

1. {}