Version Used: 16.10-p2.1
void M<SomeTypeParameter>(
SomeClass a,
SomeStruct b,
SomeRecord c,
SomeEnum d,
SomeInterface e,
SomeDelegate f,
SomeTypeParameter g)
{
}
class SomeClass { }
struct SomeStruct { }
record SomeRecord;
enum SomeEnum { }
interface SomeInterface { }
delegate void SomeDelegate();
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
</Project>

System.InvalidCastException : Unable to cast object of type 'Microsoft.CodeAnalysis.CSharp.Symbols.LocalFunctionSymbol' to type 'Microsoft.CodeAnalysis.CSharp.Symbols.SynthesizedSimpleProgramEntryPointSymbol'.
at Microsoft.CodeAnalysis.CSharp.Binder.BindSimpleProgram(CompilationUnitSyntax compilationUnit,BindingDiagnosticBag diagnostics)
at Microsoft.CodeAnalysis.CSharp.Binder.BindMethodBody(CSharpSyntaxNode syntax,BindingDiagnosticBag diagnostics)
at Microsoft.CodeAnalysis.CSharp.MemberSemanticModel.IncrementalBinder.BindMethodBody(CSharpSyntaxNode node,BindingDiagnosticBag diagnostics)
at Microsoft.CodeAnalysis.CSharp.MethodBodySemanticModel.Bind(Binder binder,CSharpSyntaxNode node,BindingDiagnosticBag diagnostics)
at Microsoft.CodeAnalysis.CSharp.MemberSemanticModel.GetBoundNodes(CSharpSyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.MemberSemanticModel.GetUpperBoundNode(CSharpSyntaxNode node,Boolean promoteToBindable)
at Microsoft.CodeAnalysis.CSharp.MemberSemanticModel.GetBoundRoot()
at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.RegionAnalysisContext(StatementSyntax firstStatement,StatementSyntax lastStatement)
at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.AnalyzeDataFlow(StatementSyntax firstStatement,StatementSyntax lastStatement)
at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.AnalyzeDataFlow(StatementSyntax statement)
at Microsoft.CodeAnalysis.CSharp.MakeLocalFunctionStatic.MakeLocalFunctionStaticHelper.TryGetDataFlowAnalysis(LocalFunctionStatementSyntax localFunction,SemanticModel semanticModel,DataFlowAnalysis& dataFlow)
at Microsoft.CodeAnalysis.CSharp.MakeLocalFunctionStatic.MakeLocalFunctionStaticHelper.CanMakeLocalFunctionStaticByRefactoringCaptures(LocalFunctionStatementSyntax localFunction,SemanticModel semanticModel,ImmutableArray`1& captures)
at async Microsoft.CodeAnalysis.CSharp.MakeLocalFunctionStatic.MakeLocalFunctionStaticCodeRefactoringProvider.ComputeRefactoringsAsync(<Unknown Parameters>)
at async Microsoft.CodeAnalysis.CodeRefactorings.CodeRefactoringService.GetRefactoringFromProviderAsync(<Unknown Parameters>)
at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)
Version Used: 16.10-p2.1