2017.3.0f3 fails to compile UWP with UnityEditor.Scripting.ScriptCompilation.EditorCompilation.m__8[CSharpLanguage]

Questions & Answers
1

I’m trying to compile my project to UWP in Unity 2017.3.0f3. Project works fine in editor, but when trying to compile a build, I get the following error:

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.<GetAllScriptAssembliesForLanguage`1>m__8[CSharpLanguage] (UnityEditor.Scripting.ScriptCompilation.ScriptAssembly a) (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilation.cs:899)
System.Linq.Enumerable+<CreateWhereIterator>c__Iterator1D`1[UnityEditor.Scripting.ScriptCompilation.ScriptAssembly].MoveNext ()
System.Collections.Generic.List`1[UnityEditor.Scripting.ScriptCompilation.ScriptAssembly].AddEnumerable (IEnumerable`1 enumerable) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/List.cs:128)
System.Collections.Generic.List`1[UnityEditor.Scripting.ScriptCompilation.ScriptAssembly]..ctor (IEnumerable`1 collection) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/List.cs:65)
System.Linq.Enumerable.ToArray[ScriptAssembly] (IEnumerable`1 source)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.GetAllScriptAssembliesForLanguage[CSharpLanguage] () (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilation.cs:899)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.GetScriptAssemblyForLanguage[CSharpLanguage] (System.String assemblyNameOrPath) (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilation.cs:906)
UnityEditor.WSA.MetroCompilationExtension.GetCsCompiler (Boolean buildingForEditor, System.String assemblyName) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/MetroCompilationExtension.cs:22)
UnityEditor.Scripting.Compilers.CSharpLanguage.GetCSharpCompiler (BuildTarget targetPlatform, Boolean buildingForEditor, System.String assemblyName) (at C:/buildslave/unity/build/Editor/Mono/Scripting/Compilers/CSharpLanguage.cs:31)
UnityEditor.Scripting.Compilers.CSharpLanguage.CreateCompiler (MonoIsland island, Boolean buildingForEditor, BuildTarget targetPlatform, Boolean runUpdater) (at C:/buildslave/unity/build/Editor/Mono/Scripting/Compilers/CSharpLanguage.cs:36)
UnityEditor.Scripting.ScriptCompilers.CreateCompilerInstance (MonoIsland island, Boolean buildingForEditor, BuildTarget targetPlatform, Boolean runUpdater) (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilers.cs:133)
UnityEditor.Scripting.ScriptCompilation.CompilationTask.QueuePendingAssemblies () (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/CompilationTask.cs:186)
UnityEditor.Scripting.ScriptCompilation.CompilationTask.Poll () (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/CompilationTask.cs:137)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.CompileScripts (UnityEditor.Scripting.ScriptCompilation.ScriptAssemblySettings scriptAssemblySettings, System.String tempBuildDirectory, EditorScriptCompilationOptions options, .TargetAssembly[]& notCompiledTargetAssemblies) (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilation.cs:706)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.CompileScripts (EditorScriptCompilationOptions options, BuildTargetGroup platformGroup, BuildTarget platform) (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilation.cs:584)
UnityEditor.Scripting.ScriptCompilation.EditorCompilationInterface+<CompileScripts>c__AnonStorey2.<>m__0 () (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilationInterface.cs:177)
UnityEditor.Scripting.ScriptCompilation.EditorCompilationInterface.EmitExceptionAsError[Boolean] (System.Func`1 func, Boolean returnValue) (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilationInterface.cs:75)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

I’ve installed all the tools mentioned on the Microsoft “Install the tools” page for Mixed reality ( Install the tools - Mixed Reality | Microsoft Learn ), but I can’t figure out what is missing. The first line includes the word “CSharpLanguage” so I make that it has something to do with the CSharp, compiler perhaps…?

What does this mean, am I missing some package in VS 2017? If yes, which one? Or is this because of something else?

2

Same Here,
“NullReferenceException: Object reference not set to an instance of an object
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.m__8[CSharpLanguage] (UnityEditor.Scripting.ScriptCompilation.ScriptAssembly a) (at C:/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilation.cs:89”

Is there any solution for this issue?

3

This seems to be a bug, but the cause seems to be assembly references (.asmref-files I guess). I had something in my project that brought these into it and then the compilation didn’t work. To fix this, I had to remove the assets that used assembly reference files (in my case, it was post production profile v2 which is in beta phase).

But this seems to be a bug and I hope it will be fixed soon!

4

We have similar problem with compilation for WSA\UWP.
We are using Assembly Definition files (.asmdef) and have same compilation errors.
Please assist.