Reported on Forums: https://forum.unity.com/threads/il2cpp-development-build-fails-since-unity-2020-2.1084859/#post-6991988

In some cases, IL2CPP build fails with error:
Exception: Failed running C:\Program Files\Unity\Hub\Editor\2020.2.2f1\Editor\Data\il2cpp/build/BeeSettings/offline/bee.exe --useprebuiltbuildprogram --no-colors

stdout:
[ ] Require frontend run. tundra.dag no longer valid. FileSignature timestamp changed: il2cpp_settings.json
[ 0s] Executed build program. Created build graph with 2 nodes.
[ 0s] Freezing tundra.dag.json into .dag (.dag file didn't exist)
[BUSY 6s] Il2Cpp .../Library/Il2cppBuildCache/Windows/x64/Native/GameAssembly.dll
...
[BUSY 526s] Il2Cpp .../Library/Il2cppBuildCache/Windows/x64/Native/GameAssembly.dll
stderr:
tundra: error: Out of memory in linear allocator: dynamicOutputDirectories

UnityEditorInternal.Runner.RunProgram (UnityEditor.Utils.Program p, System.String exe, System.String args, System.String workingDirectory, UnityEditor.Scripting.Compilers.CompilerOutputParserBase parser) (at <433cbae83977409887e43d50043210d2>:0)
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)
UnityEditorInternal.IL2CPPBuilder.RunIl2CppWithArguments (System.Collections.Generic.List`1[T] arguments, System.Action`1[T] setupStartInfo, System.String generatedCppOutputDirectory) (at <433cbae83977409887e43d50043210d2>:0)
UnityEditorInternal.IL2CPPBuilder.ConvertPlayerDlltoCpp (UnityEditor.Il2Cpp.Il2CppBuildPipelineData data, System.String outputDirectory, System.Boolean platformSupportsManagedDebugging) (at <433cbae83977409887e43d50043210d2>:0)
UnityEditorInternal.IL2CPPBuilder.Run () (at <433cbae83977409887e43d50043210d2>:0)
UnityEditorInternal.IL2CPPUtils.RunIl2Cpp (System.String stagingAreaData, UnityEditorInternal.IIl2CppPlatformProvider platformProvider, System.Action`1[T] modifyOutputBeforeCompile, UnityEditor.RuntimeClassRegistry runtimeClassRegistry) (at <433cbae83977409887e43d50043210d2>:0)
DesktopStandalonePostProcessor.RunIL2CPP (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditorInternal.IIl2CppPlatformProvider il2cppPlatformProvider, System.Collections.Generic.List`1[T] cppPlugins) (at <433cbae83977409887e43d50043210d2>:0)
DesktopStandalonePostProcessor.SetupStagingArea (UnityEditor.Modules.BuildPostProcessArgs args, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at <433cbae83977409887e43d50043210d2>:0)
DesktopStandalonePostProcessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at <433cbae83977409887e43d50043210d2>:0)
Rethrow as BuildFailedException: Exception of type 'UnityEditor.Build.BuildFailedException' was thrown.
DesktopStandalonePostProcessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at <433cbae83977409887e43d50043210d2>:0)
UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <433cbae83977409887e43d50043210d2>:0)
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)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

This is due to a crash in Tundra. This only happens after we use Bee for 0-change player builds on 2020.3.

Can reproduce by changing DefaultMethodBodyChunkSize inside IL2CPP, generating ~4000 cpp files.