Usage with Microsoft.CodeAnalysis.CSharp.Scripting produces an exception

[DarkDaskin]

I'm trying to use this library to compile a C# script against .NET Standard 2.1. Here is the code:

var code = "2+2";
var options = ScriptOptions.Default
    .WithReferences(NetStandard21.References.All)
    .AddImports("System");
var script = CSharpScript.Create(code, options);
var compilation = script.GetCompilation();
var assemblyStream = new MemoryStream();
var emitResult = compilation.Emit(assemblyStream);

However, the last line throws an exception:

System.IndexOutOfRangeException
  HResult=0x80131508
  Message=Index was outside the bounds of the array.
  Source=System.Private.CoreLib
  StackTrace:
   at Internal.Runtime.CompilerHelpers.ThrowHelpers.ThrowIndexOutOfRangeException()
   at Roslyn.Utilities.PathUtilities.CombinePathsUnchecked(String root, String relativePath)
   at Microsoft.CodeAnalysis.Scripting.Hosting.RuntimeMetadataReferenceResolver.ResolveMissingAssembly(MetadataReference definition, AssemblyIdentity referenceIdentity)
   at Microsoft.CodeAnalysis.Scripting.ScriptMetadataResolver.ResolveMissingAssembly(MetadataReference definition, AssemblyIdentity referenceIdentity)
   at Microsoft.CodeAnalysis.CommonReferenceManager`2.TryResolveMissingReference(MetadataReference requestingReference, AssemblyIdentity referenceIdentity, ImmutableDictionary`2& implicitReferenceResolutions, MetadataReferenceResolver resolver, DiagnosticBag resolutionDiagnostics, AssemblyIdentity& resolvedAssemblyIdentity, AssemblyMetadata& resolvedAssemblyMetadata, PortableExecutableReference& resolvedReference)
   at Microsoft.CodeAnalysis.CommonReferenceManager`2.ResolveAndBindMissingAssemblies(ImmutableArray`1 explicitAssemblies, MultiDictionary`2 explicitAssembliesMap, ImmutableArray`1 explicitModules, ImmutableArray`1 explicitReferences, ImmutableArray`1 explicitReferenceMap, MetadataReferenceResolver resolver, MetadataImportOptions importOptions, Boolean supersedeLowerVersions, ArrayBuilder`1 referenceBindings, Dictionary`2 assemblyReferencesBySimpleName, ImmutableArray`1& allAssemblies, ImmutableArray`1& metadataReferences, ImmutableArray`1& resolvedReferences, ImmutableDictionary`2& implicitReferenceResolutions, DiagnosticBag resolutionDiagnostics)
   at Microsoft.CodeAnalysis.CommonReferenceManager`2.Bind(ImmutableArray`1 explicitAssemblies, ImmutableArray`1 explicitModules, ImmutableArray`1 explicitReferences, ImmutableArray`1 explicitReferenceMap, MetadataReferenceResolver resolverOpt, MetadataImportOptions importOptions, Boolean supersedeLowerVersions, Dictionary`2 assemblyReferencesBySimpleName, ImmutableArray`1& allAssemblies, ImmutableArray`1& implicitlyResolvedReferences, ImmutableArray`1& implicitlyResolvedReferenceMap, ImmutableDictionary`2& implicitReferenceResolutions, DiagnosticBag resolutionDiagnostics, Boolean& hasCircularReference, Int32& corLibraryIndex)
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.ReferenceManager.CreateAndSetSourceAssemblyFullBind(CSharpCompilation compilation)
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.ReferenceManager.CreateSourceAssemblyForCompilation(CSharpCompilation compilation)
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetBoundReferenceManager()
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.get_SourceAssembly()
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.get_Assembly()
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetRuntimeMetadataVersion(EmitOptions emitOptions)
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetRuntimeMetadataVersion(EmitOptions emitOptions, DiagnosticBag diagnostics)
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.CreateModuleBuilder(EmitOptions emitOptions, IMethodSymbol debugEntryPoint, Stream sourceLinkStream, IEnumerable`1 embeddedTexts, IEnumerable`1 manifestResources, CompilationTestData testData, DiagnosticBag diagnostics, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Compilation.CheckOptionsAndCreateModuleBuilder(DiagnosticBag diagnostics, IEnumerable`1 manifestResources, EmitOptions options, IMethodSymbol debugEntryPoint, Stream sourceLinkStream, IEnumerable`1 embeddedTexts, CompilationTestData testData, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Compilation.Emit(Stream peStream, Stream metadataPEStream, Stream pdbStream, Stream xmlDocumentationStream, Stream win32Resources, IEnumerable`1 manifestResources, EmitOptions options, IMethodSymbol debugEntryPoint, Stream sourceLinkStream, IEnumerable`1 embeddedTexts, RebuildData rebuildData, CompilationTestData testData, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Compilation.Emit(Stream peStream, Stream pdbStream, Stream xmlDocumentationStream, Stream win32Resources, IEnumerable`1 manifestResources, EmitOptions options, IMethodSymbol debugEntryPoint, Stream sourceLinkStream, IEnumerable`1 embeddedTexts, Stream metadataPEStream, RebuildData rebuildData, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Compilation.Emit(Stream peStream, Stream pdbStream, Stream xmlDocumentationStream, Stream win32Resources, IEnumerable`1 manifestResources, EmitOptions options, IMethodSymbol debugEntryPoint, Stream sourceLinkStream, IEnumerable`1 embeddedTexts, Stream metadataPEStream, CancellationToken cancellationToken)
...

Am I using the library the wrong way, or there is a bug?

If I omit the WithReferences line, the script compiles just fine, but against .NET 9, which is not what I want.