Assert failure in BindMethodBody.assertBindIdentifierTargets() with [param:] attribute on local function

[cston]

Version Used: e867be9

Steps to Reproduce:

Compile the following with a DEBUG build:

using System;

[AttributeUsage(AttributeTargets.All)]
class A : Attribute
{
    public A(string s) { }
}

class C
{
    event EventHandler E
    {
        add
        {
            [param: A(nameof(p))] void F(int p) { }
        }
        remove
        {
        }
    }
}

Result:

Debug.Assert() failure:

Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.MethodCompiler.BindMethodBody.__assertBindIdentifierTargets|42_3(Microsoft.CodeAnalysis.CSharp.InMethodBinder inMethodBinder, System.Collections.Concurrent.ConcurrentDictionary<Microsoft.CodeAnalysis.CSharp.Syntax.IdentifierNameSyntax, int> identifierMap, Microsoft.CodeAnalysis.CSharp.BoundNode methodBody, Microsoft.CodeAnalysis.CSharp.BindingDiagnosticBag diagnostics) Line 2143 C#
Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.MethodCompiler.BindMethodBody(Microsoft.CodeAnalysis.CSharp.Symbols.MethodSymbol method, Microsoft.CodeAnalysis.CSharp.TypeCompilationState compilationState, Microsoft.CodeAnalysis.CSharp.BindingDiagnosticBag diagnostics, bool includeInitializersInBody, Microsoft.CodeAnalysis.CSharp.BoundNode initializersBody, bool reportNullableDiagnostics, out Microsoft.CodeAnalysis.CSharp.ImportChain importChain, out bool originalBodyNested, out bool prependedDefaultValueTypeConstructorInitializer, out Microsoft.CodeAnalysis.CSharp.MethodBodySemanticModel.InitialState forSemanticModel) Line 1782 C#
Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.MethodCompiler.CompileMethod(Microsoft.CodeAnalysis.CSharp.Symbols.MethodSymbol methodSymbol, int methodOrdinal, ref Microsoft.CodeAnalysis.CSharp.Binder.ProcessedFieldInitializers processedInitializers, Microsoft.CodeAnalysis.CSharp.SynthesizedSubmissionFields previousSubmissionFields, Microsoft.CodeAnalysis.CSharp.TypeCompilationState compilationState) Line 991 C#
...