Crossgen'd NuGet.LibraryModel produces MissingMethodException: Method not found: '?'.

[eerhardt]

Using the following project:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.0</TargetFramework>
    <RuntimeFrameworkVersion>2.0.0-beta-001386-00</RuntimeFrameworkVersion>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="NuGet.LibraryModel" Version="4.0.0-rc3-2193" />
  </ItemGroup>
</Project>

using System;
using NuGet.LibraryModel;
using NuGet.Versioning;

namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            LibraryDependency d = new LibraryDependency();
            d.LibraryRange = new LibraryRange("foot", new VersionRange(new NuGetVersion("10")), LibraryDependencyTarget.Package);
            d.GetHashCode();
        }
    }
}

Steps to repro:

1. dotnet restore and publish the above project. (You may need to add https://dotnet.myget.org/F/cli-deps/api/v3/index.json to your nuget.config to restore these packages)
2. Cross gen the NuGet.LibraryModel.dll assembly
   a. I used the following command:

F:\cli\.nuget\packages/runtime.win7-x64.microsoft.netcore.runtime.coreclr/1.2.0-beta-24904-03/tools/crossgen.exe -readytorun -in "F:\DotNetTest\My20App\bin\Debug\netcoreapp2.0\publish\NuGet.LibraryModel.dll" -platform_assemblies_paths F:\cli\/artifacts/win10-x64/stage2/shared/Microsoft.NETCore.App/2.0.0-beta-001386-00;  -JITPath F:\cli\.nuget\packages/runtime.win7-x64.microsoft.netcore.jit/1.2.0-beta-24904-03/runtimes/win7-x64/native/clrjit.dll -App_Paths F:\DotNetTest\My20App\bin\Debug\netcoreapp2.0\publish

3. Replace the NuGet.LibraryModel.dll in your app's publish directory with the cross-gen'd NuGet.LibraryModel.ni.dll (to ensure the crossgen'd assembly is loaded)
4. Run the app using F:\cli\artifacts\win10-x64\stage2\dotnet.exe bin\Debug\netcoreapp2.0\publish\My20App.dll (note use a dotnet.exe that has a shared framework 2.0.0-beta-001386-00 installed).

Expected result:
The app should execute as usual.

Actual result:

Unhandled Exception: System.MissingMethodException: Method not found: '?'.
   at NuGet.LibraryModel.LibraryRange.GetHashCode()
   at NuGet.LibraryModel.LibraryDependency.GetHashCode()
   at ConsoleApp.Program.Main(String[] args) in F:\DotNetTest\My20App\Program.cs:line 13

[gkhanna79]

CC @jkotas

[jkotas]

This is regression introduced by dotnet/coreclr#7895. Encoding of native method signatures gets confused by the artificial constrainedType.

cc @MichalStrehovsky

Simple repro - crossgen and run using corerun:

using System;

enum MyEnum {
   XXX
}

class My {
    static void Main() {
        MyEnum v = MyEnum.XXX;
        v.GetHashCode();
    }
}

[eerhardt]

I'm also seeing this error in the compiler as well:

                     /Users/eerhardt/git/cli/artifacts/osx.10.12-x64/stage2/sdk/2.0.0-alpha-004617/Roslyn/RunCsc.sh /noconfig /unsafe- /nowarn:1701,1702,1705,1701,1702 /nostdlib+ /errorreport:prompt /warn:4 /define:TRACE;NETSTANDARD1_5;DEBUG /reference:/Users/eerhardt/.nuget/packages/microsoft.win32.primitives/4.0.1/ref/netstandard1.3/Microsoft.Win32.Primitives.dll /reference:/Users/eerhardt/.nuget/packages/system.appcontext/4.1.0/ref/netstandard1.3/System.AppContext.dll /reference:/Users/eerhardt/.nuget/packages/system.collections.concurrent/4.0.12/ref/netstandard1.3/System.Collections.Concurrent.dll /reference:/Users/eerhardt/.nuget/packages/system.collections/4.0.11/ref/netstandard1.3/System.Collections.dll /reference:/Users/eerhardt/.nuget/packages/system.console/4.0.0/ref/netstandard1.3/System.Console.dll /reference:/Users/eerhardt/.nuget/packages/system.diagnostics.debug/4.0.11/ref/netstandard1.3/System.Diagnostics.Debug.dll /reference:/Users/eerhardt/.nuget/packages/system.diagnostics.tools/4.0.1/ref/netstandard1.0/System.Diagnostics.Tools.dll /reference:/Users/eerhardt/.nuget/packages/system.diagnostics.tracing/4.1.0/ref/netstandard1.5/System.Diagnostics.Tracing.dll /reference:/Users/eerhardt/.nuget/packages/system.globalization.calendars/4.0.1/ref/netstandard1.3/System.Globalization.Calendars.dll /reference:/Users/eerhardt/.nuget/packages/system.globalization/4.0.11/ref/netstandard1.3/System.Globalization.dll /reference:/Users/eerhardt/.nuget/packages/system.io.compression/4.1.0/ref/netstandard1.3/System.IO.Compression.dll /reference:/Users/eerhardt/.nuget/packages/system.io.compression.zipfile/4.0.1/ref/netstandard1.3/System.IO.Compression.ZipFile.dll /reference:/Users/eerhardt/.nuget/packages/system.io/4.1.0/ref/netstandard1.5/System.IO.dll /reference:/Users/eerhardt/.nuget/packages/system.io.filesystem/4.0.1/ref/netstandard1.3/System.IO.FileSystem.dll /reference:/Users/eerhardt/.nuget/packages/system.io.filesystem.primitives/4.0.1/ref/netstandard1.3/System.IO.FileSystem.Primitives.dll /reference:/Users/eerhardt/.nuget/packages/system.linq/4.1.0/ref/netstandard1.0/System.Linq.dll /reference:/Users/eerhardt/.nuget/packages/system.linq.expressions/4.1.0/ref/netstandard1.3/System.Linq.Expressions.dll /reference:/Users/eerhardt/.nuget/packages/system.net.http/4.1.0/ref/netstandard1.3/System.Net.Http.dll /reference:/Users/eerhardt/.nuget/packages/system.net.primitives/4.0.11/ref/netstandard1.3/System.Net.Primitives.dll /reference:/Users/eerhardt/.nuget/packages/system.net.sockets/4.1.0/ref/netstandard1.3/System.Net.Sockets.dll /reference:/Users/eerhardt/.nuget/packages/system.objectmodel/4.0.12/ref/netstandard1.3/System.ObjectModel.dll /reference:/Users/eerhardt/.nuget/packages/system.reflection/4.1.0/ref/netstandard1.5/System.Reflection.dll /reference:/Users/eerhardt/.nuget/packages/system.reflection.extensions/4.0.1/ref/netstandard1.0/System.Reflection.Extensions.dll /reference:/Users/eerhardt/.nuget/packages/system.reflection.primitives/4.0.1/ref/netstandard1.0/System.Reflection.Primitives.dll /reference:/Users/eerhardt/.nuget/packages/system.resources.resourcemanager/4.0.1/ref/netstandard1.0/System.Resources.ResourceManager.dll /reference:/Users/eerhardt/.nuget/packages/system.runtime/4.1.0/ref/netstandard1.5/System.Runtime.dll /reference:/Users/eerhardt/.nuget/packages/system.runtime.extensions/4.1.0/ref/netstandard1.5/System.Runtime.Extensions.dll /reference:/Users/eerhardt/.nuget/packages/system.runtime.handles/4.0.1/ref/netstandard1.3/System.Runtime.Handles.dll /reference:/Users/eerhardt/.nuget/packages/system.runtime.interopservices/4.1.0/ref/netstandard1.5/System.Runtime.InteropServices.dll /reference:/Users/eerhardt/.nuget/packages/system.runtime.interopservices.runtimeinformation/4.0.0/ref/netstandard1.1/System.Runtime.InteropServices.RuntimeInformation.dll /reference:/Users/eerhardt/.nuget/packages/system.runtime.numerics/4.0.1/ref/netstandard1.1/System.Runtime.Numerics.dll /reference:/Users/eerhardt/.nuget/packages/system.security.cryptography.algorithms/4.2.0/ref/netstandard1.4/System.Security.Cryptography.Algorithms.dll /reference:/Users/eerhardt/.nuget/packages/system.security.cryptography.encoding/4.0.0/ref/netstandard1.3/System.Security.Cryptography.Encoding.dll /reference:/Users/eerhardt/.nuget/packages/system.security.cryptography.primitives/4.0.0/ref/netstandard1.3/System.Security.Cryptography.Primitives.dll /reference:/Users/eerhardt/.nuget/packages/system.security.cryptography.x509certificates/4.1.0/ref/netstandard1.4/System.Security.Cryptography.X509Certificates.dll /reference:/Users/eerhardt/.nuget/packages/system.text.encoding/4.0.11/ref/netstandard1.3/System.Text.Encoding.dll /reference:/Users/eerhardt/.nuget/packages/system.text.encoding.extensions/4.0.11/ref/netstandard1.3/System.Text.Encoding.Extensions.dll /reference:/Users/eerhardt/.nuget/packages/system.text.regularexpressions/4.1.0/ref/netstandard1.3/System.Text.RegularExpressions.dll /reference:/Users/eerhardt/.nuget/packages/system.threading/4.0.11/ref/netstandard1.3/System.Threading.dll /reference:/Users/eerhardt/.nuget/packages/system.threading.tasks/4.0.11/ref/netstandard1.3/System.Threading.Tasks.dll /reference:/Users/eerhardt/.nuget/packages/system.threading.timer/4.0.1/ref/netstandard1.2/System.Threading.Timer.dll /reference:/Users/eerhardt/.nuget/packages/system.xml.readerwriter/4.0.11/ref/netstandard1.3/System.Xml.ReaderWriter.dll /reference:/Users/eerhardt/.nuget/packages/system.xml.xdocument/4.0.11/ref/netstandard1.3/System.Xml.XDocument.dll /debug+ /debug:portable /filealign:512 /nologo /optimize- /out:obj/Debug/netstandard1.5/AnalyzerBug.dll /target:library /warnaserror- /utf8output /deterministic+ /analyzer:/Users/eerhardt/.nuget/packages/system.runtime.analyzers/1.1.0/analyzers/dotnet/cs/System.Runtime.Analyzers.dll /analyzer:/Users/eerhardt/.nuget/packages/system.runtime.analyzers/1.1.0/analyzers/dotnet/cs/System.Runtime.CSharp.Analyzers.dll Program.cs "/var/folders/zl/xv_h1qs11l53g5g9ht1wlmx00000gn/T/.NETStandard,Version=v1.5.AssemblyAttributes.cs" obj/Debug/netstandard1.5/AnalyzerBug.AssemblyInfo.cs (TaskId:23)
                      (TaskId:23)
                     Unhandled Exception: System.MissingMethodException: Method not found: '?'. (TaskId:23)
                        at Microsoft.CodeAnalysis.DiagnosticDescriptor.GetHashCode() (TaskId:23)
                        at Roslyn.Utilities.Hash.Combine[T](T newKeyPart, Int32 currentKey) (TaskId:23)
                        at Microsoft.CodeAnalysis.Diagnostic.SimpleDiagnostic.GetHashCode() (TaskId:23)
                        at System.Collections.Generic.GenericEqualityComparer`1.GetHashCode(T obj) (TaskId:23)
                        at System.Collections.Generic.HashSet`1.InternalGetHashCode(T item) (TaskId:23)
                        at System.Collections.Generic.HashSet`1.AddIfNotPresent(T value) (TaskId:23)
                        at System.Collections.Generic.HashSet`1.Add(T item) (TaskId:23)
                        at Microsoft.CodeAnalysis.CommonCompiler.ReportErrors(IEnumerable`1 diagnostics, TextWriter consoleOutput, ErrorLogger errorLoggerOpt) (TaskId:23)
                        at Microsoft.CodeAnalysis.CommonCompiler.RunCore(TextWriter consoleOutput, ErrorLogger errorLogger, CancellationToken cancellationToken) (TaskId:23)
                        at Microsoft.CodeAnalysis.CommonCompiler.Run(TextWriter consoleOutput, CancellationToken cancellationToken) (TaskId:23)
                        at Microsoft.CodeAnalysis.CSharp.CommandLine.Csc.<>c__DisplayClass1_0.<Run>b__0(TextWriter tw) (TaskId:23)
                        at Microsoft.CodeAnalysis.CommandLine.ConsoleUtil.RunWithUtf8Output[T](Func`2 func) (TaskId:23)
                        at Microsoft.CodeAnalysis.CommandLine.ConsoleUtil.RunWithUtf8Output[T](Boolean utf8Output, TextWriter textWriter, Func`2 func) (TaskId:23)
                        at Microsoft.CodeAnalysis.CSharp.CommandLine.Csc.Run(String[] args, BuildPaths buildPaths, TextWriter textWriter, IAnalyzerAssemblyLoader analyzerLoader) (TaskId:23)
                        at Microsoft.CodeAnalysis.CommandLine.CoreClrBuildClient.RunLocalCompilation(String[] arguments, BuildPaths buildPaths, TextWriter textWriter) (TaskId:23)
                        at Microsoft.CodeAnalysis.CommandLine.BuildClient.RunCompilation(IEnumerable`1 originalArguments, BuildPaths buildPaths, TextWriter textWriter) (TaskId:23)
                        at Microsoft.CodeAnalysis.CommandLine.CoreClrBuildClient.Run(IEnumerable`1 arguments, RequestLanguage language, CompileFunc compileFunc) (TaskId:23)
                        at Microsoft.CodeAnalysis.CSharp.CommandLine.Program.Main(String[] args) (TaskId:23)

The odd thing about the compiler exception is that I am only seeing it on non-Windows. The exact same test passes on Windows. I ran into the above "NuGet.LibraryModel" error on Windows (I didn't test non-Windows). It might just be that Roslyn doesn't get into this code path on Windows,