Restore FAILS with <RuntimeIdentifiers> set and <PackageReference> to BOTH NS 1.x + 2.0

[ogreenz]

Repro repo:
https://github.com/ogreenz/rid-netstandard2-repro

dotnet --info:

dotnet --info
.NET Command Line Tools (2.0.3)

Product Information:
 Version:            2.0.3
 Commit SHA-1 hash:  12f0c7efcc

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.16299
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\2.0.3\

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.3
  Build    : a9190d4a75f4a982ae4b4fa8d1a24526566c69df

Project references both NodaTime (NS 1.x) and Dapper (NS 2.0).

When built WITHOUT <RuntimeIdentifiers> in the .csproj dotnet restore runs to completion and restore is successfull.

When <RuntimeIdentifiers> is set to any valid value AND both packages are referenced/used restore fails with these cryptic messages:

$ dotnet restore
  Restoring packages for C:\projects\repro-netstandard\repro-netstandard.csproj...
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605: Detected package downgrade: System.IO.FileSystem.Primitives from 4.3.0 to 4.0.1. Reference the package directly from the project to select a different version.
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.IO.FileSystem 4.0.1 -> runtime.win.System.IO.FileSystem 4.3.0 -> System.IO.FileSystem.Primitives (>= 4.3.0)
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.IO.FileSystem.Primitives (>= 4.0.1)
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605: Detected package downgrade: System.Resources.ResourceManager from 4.3.0 to 4.0.1. Reference the package directly from the project to select a different version.
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.IO.FileSystem 4.0.1 -> runtime.win.System.IO.FileSystem 4.3.0 -> System.Resources.ResourceManager (>= 4.3.0)
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.Resources.ResourceManager (>= 4.0.1)
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605: Detected package downgrade: System.Runtime.Handles from 4.3.0 to 4.0.1. Reference the package directly from the project to select a different version.
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.IO.FileSystem 4.0.1 -> runtime.win.System.IO.FileSystem 4.3.0 -> System.Runtime.Handles (>= 4.3.0)
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.IO.FileSystem 4.0.1 -> System.Runtime.Handles (>= 4.0.1)
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605: Detected package downgrade: System.Runtime.InteropServices from 4.3.0 to 4.1.0. Reference the package directly from the project to select a different version.
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.IO.FileSystem 4.0.1 -> runtime.win.System.IO.FileSystem 4.3.0 -> System.Runtime.InteropServices (>= 4.3.0)
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.Runtime.InteropServices (>= 4.1.0)
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605: Detected package downgrade: System.Text.Encoding.Extensions from 4.3.0 to 4.0.11. Reference the package directly from the project to select a different version.
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.IO.FileSystem 4.0.1 -> runtime.win.System.IO.FileSystem 4.3.0 -> System.Text.Encoding.Extensions (>= 4.3.0)
C:\projects\repro-netstandard\repro-netstandard.csproj : error NU1605:  repro-netstandard -> NodaTime 2.2.3 -> System.Runtime.Serialization.Xml 4.1.1 -> System.Xml.ReaderWriter 4.0.11 -> System.Text.Encoding.Extensions (>= 4.0.11)
  Generating MSBuild file C:\projects\repro-netstandard\obj\repro-netstandard.csproj.nuget.g.props.
  Restore failed in 378 ms for C:\projects\repro-netstandard\repro-netstandard.csproj.

Note that if Dapper / NodaTime are used exclusively dotnet restore while using <RuntimeIdentifiers> runs successfully again....

[livarcocc]

This issue was moved to NuGet/Home#6457