Error building WebGL project in CI

Hey guys, I've been banging my head on the table over this one for a couple of days now... if you have any suggestions at all I'd really appreciate it.

Some key points:

I have a WebGL project that I'm trying to build remotely in Circle CI using this docker image https://hub.docker.com/r/gableroux/unity3d/.

I'm using a jslib with using System.Runtime.InteropServices; and [DllImport("__Internal")] (not sure if related).

The project builds fine locally, both via the unity editor and via the CLI, but fails when building in the docker image in CI.

The docker container has 4GB of RAM.

License activation is working fine, and the build is running but throwing an error.

Build appears to run smoothly until the il2cpp post processing part.

Then i see (trying to not spam you with a massive error message so I've cut some bits out where ** is):

Failed running /opt/Unity/Editor/Data/il2cpp/build/deploy/net471/il2cpp.exe --convert-to-cpp --dotnetprofile="unityaot" --compile-cpp --libil2cpp-static --platform="WebGL" --architecture="EmscriptenJavaScript" --configuration="Release" --outputpath="/root/workspace/Assets /../Temp/StagingArea/Data/Native/build.bc" --cachedirectory="/root/workspace/Assets/../Library/il2cpp_cache" --compiler-flags="-Oz -DIL2CPP_EXCEPTION_DISABLED=1 " --emit-method-map [--additional-libraries= ... (lots of additional libraries, lmk if they might be relevant) ] --profiler-report --map-file-parser="/opt/Unity/Editor/Data/Tools/MapFileParser/MapFileParser" --directory="/root/workspace/Temp/StagingArea/Data/Managed" --generatedcppdir="/root/workspace/Temp/StagingArea/Data/il2cppOutput"

il2cpp.exe didn't catch exception: Unity.IL2CPP.Building.BuilderFailedException: (that same command above again)

Traceback (most recent call last): File "/opt/Unity/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/emcc.py", line 3063, in sys.exit(run()) File "/opt/Unity/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/emcc.py", line 1607, in run shared.Building.link(linker_inputs, specified_target) File "/opt/Unity/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/tools/shared.py", line 2114, in link output = run_process([LLVM_LINK] + link_args + ['-o', target], stdout=PIPE).stdout File "/opt/Unity/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/tools/shared.py", line 167, in run_process return run_base(cmd, universal_newlines=universal_newlines, check=check, args, *kw) File "/opt/Unity/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/tools/shared.py", line 162, in run_base result.check_returncode() File "/opt/Unity/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/tools/shared.py", line 148, in check_returncode raise Py2CalledProcessError(returncode=self.returncode, cmd=self.args, output=self.stdout, stderr=self.stderr) tools.shared.Py2CalledProcessError: Command '['/opt/Unity/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten_FastComp_Linux/llvm-link', '@/tmp/tmpCPp3vB.response', '-o', '/root/workspace/Library/il2cpp_cache/linkresult_D6CF06372CB752494F520E4794944216/build.bc']' returned non-zero exit status -9

at Unity.IL2CPP.Building.CppProgramBuilder.PostprocessObjectFiles (System.Collections.Generic.HashSet`1[T] objectFiles, Unity.IL2CPP.Building.ToolChains.CppToolChainContext toolChainContext) [0x001fb] in :0 at Unity.IL2CPP.Building.CppProgramBuilder.Build (Unity.IL2CPP.Building.Statistics.IBuildStatistics& statistics) [0x00275] in :0 at Unity.IL2CPP.Building.Statistics.BuildingTestRunnerHelper.BuildAndLogStatsForTestRunner (Unity.IL2CPP.Building.CppProgramBuilder builder, Unity.IL2CPP.Building.Statistics.IBuildStatistics& statistics) [0x00001] in :0 at il2cpp.Program.DoRun (System.String[] args, System.Collections.Generic.List`1[T] foundAssemblies) [0x005b5] in :0 at il2cpp.Program.Run (System.String[] args, System.Boolean setInvariantCulture) [0x00042] in :0 at il2cpp.Program.Main (System.String[] args) [0x00002] in :0

Exception: /opt/Unity/Editor/Data/il2cpp/build/deploy/net471/il2cpp.exe did not run properly! at UnityEditorInternal.Runner.RunProgram (UnityEditor.Utils.Program p, System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser) [0x00120] in /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/BuildUtils.cs:128 at UnityEditorInternal.Runner.RunManagedProgram (System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser, System.Action`1[T] setupStartInfo) [0x00060] in /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/BuildUtils.cs:71 at UnityEditorInternal.IL2CPPBuilder.RunIl2CppWithArguments (System.Collections.Generic.List`1[T] arguments, System.Action`1[T] setupStartInfo, System.String workingDirectory) [0x00086] in /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:519 at UnityEditorInternal.IL2CPPBuilder.ConvertPlayerDlltoCpp (UnityEditor.Il2Cpp.Il2CppBuildPipelineData data, System.String outputDirectory, System.String workingDirectory, System.Boolean platformSupportsManagedDebugging) [0x002e8] in /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:500 at UnityEditorInternal.IL2CPPBuilder.Run () [0x000ce] in /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:337 at UnityEditorInternal.IL2CPPUtils.RunIl2Cpp (System.String stagingAreaData, UnityEditorInternal.IIl2CppPlatformProvider platformProvider, System.Action`1[T] modifyOutputBeforeCompile, UnityEditor.RuntimeClassRegistry runtimeClassRegistry) [0x0001c] in /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:72 at UnityEditor.WebGL.WebGlBuildPostprocessor.CompileBuild (UnityEditor.Modules.BuildPostProcessArgs args) [0x000d3] in /Users/builduser/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:387 at UnityEditor.WebGL.WebGlBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) [0x002ad] in /Users/builduser/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:929 at UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) [0x00001] in /home/builduser/buildslave/unity/build/Editor/Mono/Modules/DefaultBuildPostprocessor.cs:27 at 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) [0x000dc] in /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:340 UnityEditor.BuildPipeline:BuildPlayerInternalNoCheck(String[], String, String, BuildTargetGroup, BuildTarget, BuildOptions, Boolean) UnityEditor.BuildPipeline:BuildPlayerInternal(String[], String, String, BuildTargetGroup, BuildTarget, BuildOptions) (at /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline.bindings.cs:376) UnityEditor.BuildPipeline:BuildPlayer(String[], String, String, BuildTargetGroup, BuildTarget, BuildOptions) (at /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline.bindings.cs:275) UnityEditor.BuildPipeline:BuildPlayer(BuildPlayerOptions) (at /home/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline.bindings.cs:258) BuildCommand:PerformBuild() (at Assets/Scripts/Editor/BuildCommand.cs:159)

I skipped out some parts of the error logs that looked repetitive but lmk if you need to see them and i can send them over.

Thanks so much for any guidance you can offer.