Nuget pack NotImplementedException repro

.gitignore

bin/
obj/
.idea/

AssemblyInfo.cs

using System.Reflection;
using System.Runtime.InteropServices;

// General Information about an assembly is controlled through the following 
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyTitle("NugetPackBug")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("NugetPackBug")]
[assembly: AssemblyCopyright("Copyright ©  2018")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]

// Setting ComVisible to false makes the types in this assembly not visible 
// to COM components.  If you need to access a type in this assembly from 
// COM, set the ComVisible attribute to true on that type.
[assembly: ComVisible(false)]

// The following GUID is for the ID of the typelib if this project is exposed to COM
[assembly: Guid("3CA46808-997E-4675-A8DB-E12EF16BC2D4")]

// Version information for an assembly consists of the following four values:
//
//      Major Version
//      Minor Version 
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Build and Revision Numbers 
// by using the '*' as shown below:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]

NugetPackBug.csproj

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProjectGuid>{3CA46808-997E-4675-A8DB-E12EF16BC2D4}</ProjectGuid>
    <OutputType>Exe</OutputType>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>NugetPackBug</RootNamespace>
    <AssemblyName>NugetPackBug</AssemblyName>
    <TargetFrameworkVersion>v4.7</TargetFrameworkVersion>
    <FileAlignment>512</FileAlignment>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <PlatformTarget>AnyCPU</PlatformTarget>
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\Debug\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <PlatformTarget>AnyCPU</PlatformTarget>
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\Release\</OutputPath>
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="System" />
    <Reference Include="System.Core" />
    <Reference Include="System.Data" />
    <Reference Include="System.Xml" />
  </ItemGroup>
  <ItemGroup>
    <Compile Include="AssemblyInfo.cs" />
    <Compile Include="Program.cs" />
  </ItemGroup>
  <ItemGroup>
    <Content Include="NugetPackBug.nuspec" />
  </ItemGroup>
  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
		 Other similar extension points exist, see Microsoft.Common.targets.
	<Target Name="BeforeBuild">
	</Target>
	<Target Name="AfterBuild">
	</Target>
	-->
</Project>

NugetPackBug.nuspec

<?xml version="1.0" encoding="utf-8"?>
<package>
	<metadata>
		<id>$id$</id>
		<version>$version$</version>
		<authors>Foo</authors>
		<description>Testing nuget packing bug</description>
	</metadata>
</package>

NugetPackBug2.sln


Microsoft Visual Studio Solution File, Format Version 12.00
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NugetPackBug", "NugetPackBug.csproj", "{3CA46808-997E-4675-A8DB-E12EF16BC2D4}"
EndProject
Global
	GlobalSection(SolutionConfigurationPlatforms) = preSolution
		Debug|Any CPU = Debug|Any CPU
		Release|Any CPU = Release|Any CPU
	EndGlobalSection
	GlobalSection(ProjectConfigurationPlatforms) = postSolution
		{3CA46808-997E-4675-A8DB-E12EF16BC2D4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
		{3CA46808-997E-4675-A8DB-E12EF16BC2D4}.Debug|Any CPU.Build.0 = Debug|Any CPU
		{3CA46808-997E-4675-A8DB-E12EF16BC2D4}.Release|Any CPU.ActiveCfg = Release|Any CPU
		{3CA46808-997E-4675-A8DB-E12EF16BC2D4}.Release|Any CPU.Build.0 = Release|Any CPU
	EndGlobalSection
EndGlobal

Program.cs

namespace NugetPackBug
{
	internal class Program
	{
		public static void Main(string[] args)
		{
		}
	}
}