Error building symbol .snupkg package when using embedded license file

[chitsaw]

Details about Problem

Attempting to build symbol NuGet .snupkg package fails when using embedded license file with the PackageLicenseFile property.

NuGet product used: VS UI, dotnet pack

dotnet.exe --version: 2.1.500

VS version: 15.9.3

OS version: win10 v1809 (17763.134)

Detailed repro steps so we can see the same problem

1. Build a C# netstandard2.0 project in Visual Studio 15.9.3 with the following properties set in the .csproj file:

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
    <PackageLicenseFile>LICENSE.txt</PackageLicenseFile>
    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
    <IncludeSymbols>true</IncludeSymbols>
  </PropertyGroup>

  <ItemGroup>
    <None Include="LICENSE.txt" Pack="true" PackagePath="$(PackageLicenseFile)"/>
  </ItemGroup>

2. Build generates the main .nupkg file successfully but fails to generate the .snupkg with the following error message:
   error NU5030: The license file 'LICENSE.txt' does not exist in the package.

3. Expected build to generate both .nupkg and .snupkg files.

Verbose Logs

Please include verbose logs (NuGet.exe -verbosity detailed | dotnet.exe --verbosity diag | etc...)

log.txt

Sample Project

Very helpful if you can zip a project and paste into this issue!

MySampleLibrary.zip

[nkolev92]

Merged in release-4.9.3-rtm

[StevenTCramer]

I download the sample above and it still fails.

λ  dotnet --version
3.0.100-preview-010184
C:\git\temp\MySampleLibrary
λ  dotnet build
Microsoft (R) Build Engine version 16.0.385-preview+g966cdf2ac6 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restoring packages for C:\git\temp\MySampleLibrary\MySampleLibrary.csproj...
  Generating MSBuild file C:\git\temp\MySampleLibrary\obj\MySampleLibrary.csproj.nuget.g.props.
  Restore completed in 149.27 ms for C:\git\temp\MySampleLibrary\MySampleLibrary.csproj.
C:\Program Files\dotnet\sdk\3.0.100-preview-010184\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.RuntimeIdentifierInference.targets(151,5): message NETSDK1057: You are using a preview version of .NET Core. See: https://aka.ms/dotnet-core-preview [C:\git\temp\MySampleLibrary\MySampleLibrary.csproj]
  MySampleLibrary -> C:\git\temp\MySampleLibrary\bin\Debug\netstandard2.0\MySampleLibrary.dll
  Successfully created package 'C:\git\temp\MySampleLibrary\bin\Debug\MySampleLibrary.1.0.0.nupkg'.
C:\Program Files\dotnet\sdk\3.0.100-preview-010184\Sdks\NuGet.Build.Tasks.Pack\build\NuGet.Build.Tasks.Pack.targets(199,5): error NU5030: The license file 'LICENSE.txt' does not exist in the package. [C:\git\temp\MySampleLibrary\MySampleLibrary.csproj]

Build FAILED.

C:\Program Files\dotnet\sdk\3.0.100-preview-010184\Sdks\NuGet.Build.Tasks.Pack\build\NuGet.Build.Tasks.Pack.targets(199,5): error NU5030: The license file 'LICENSE.txt' does not exist in the package. [C:\git\temp\MySampleLibrary\MySampleLibrary.csproj]
    0 Warning(s)
    1 Error(s)

[eerhardt]

I assume this bug was fixed in the .NET Core SDK 2.2.105? I am seeing this issue with 2.2.103, but not 2.2.105.