GenAPI does not handle types in the global namespace correctly

[reflectronic]

The following project:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net10.0</TargetFramework>
  </PropertyGroup>

  <PropertyGroup>
    <RestoreAdditionalProjectSources>https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet10-transport/nuget/v3/index.json</RestoreAdditionalProjectSources>
    <ProduceReferenceAssembly>false</ProduceReferenceAssembly>
    <GenAPIGenerateReferenceAssemblySource>true</GenAPIGenerateReferenceAssemblySource>
    <GenAPITargetPath>..\ref\$(AssemblyName).cs</GenAPITargetPath>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.DotNet.GenAPI.Task" Version="10.0.100-rtm.25479.115" PrivateAssets="all" />
  </ItemGroup>

</Project>

containing the following source file:

public class Class1;

generates the following C# code for the reference assembly:

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace <global namespace>
{
    public partial class Class1
    {
    }
}

There should be no namespace declaration generated for types in the global namespace.