TypeLoadException

[hypeartist]

Visual Studio 2019 Preview 3.0 .NET Core 3.0 Console Application

Code to reproduce:

using System;
using System.Runtime.Intrinsics.X86;
namespace ConsoleApp1
{
	class Program
	{
		static unsafe void Main(string[] args)
		{
			Console.WriteLine("Hello World!");

			DoTest();

			Console.WriteLine($"Is sup: {Sse42.IsSupported}");
		}

		static unsafe void DoTest()
		{
			var srcBuf = stackalloc[] { (byte)0xF0, (byte)0xF0, (byte)0xF0, (byte)0xF0 };
			var dstBuf = stackalloc[] { (byte)0xF0, (byte)0xF0, (byte)0xF0, (byte)0xF0 };
			var cvrBuf = stackalloc[] { (byte)0xF0, (byte)0xF0, (byte)0xF0, (byte)0xF0 };
			var alphaBuf = stackalloc[] { (byte)0xF0, (byte)0xF0, (byte)0xF0, (byte)0xF0 };
			var csmBuf = stackalloc[]
			{
				(byte)0x00,
				(byte)0xFF,
				(byte)0xFF,
				(byte)0xFF,
				(byte)0x01,
				(byte)0xFF,
				(byte)0xFF,
				(byte)0xFF,
				(byte)0x02,
				(byte)0xFF,
				(byte)0xFF,
				(byte)0xFF,
				(byte)0x03,
				(byte)0xFF,
				(byte)0xFF,
				(byte)0xFF
			};
			var onesBuf = stackalloc[]
			{
				(byte)0x01,
				(byte)0x00,
				(byte)0x00,
				(byte)0x00,
				(byte)0x01,
				(byte)0x00,
				(byte)0x00,
				(byte)0x00,
				(byte)0x01,
				(byte)0x00,
				(byte)0x00,
				(byte)0x00,
				(byte)0x01,
				(byte)0x00,
				(byte)0x00,
				(byte)0x00,
			};

			var length = 4;

			var rCvr = Sse42.LoadVector128(cvrBuf);
			var rSrc = Sse42.LoadVector128(srcBuf);
			for (int i = 0; i < length; i++)
			{
				rCvr = Sse42.Shuffle(rCvr, Sse42.LoadVector128(csmBuf));
				rCvr = Sse42.Add(rCvr, Sse42.LoadVector128(onesBuf));
			}
		}
	}
}

"Disasm 'DoTest' method" fails with:

Unhandled Exception: System.TypeLoadException: Could not load type 'Internal.Runtime.Augments.EnvironmentAugments' from assembly 'System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e'.
   at System.Environment.get_CurrentManagedThreadId()
   at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate)
   at ConsoleApp1.Program.Main(String[] args)

[EgorBo]

Unfortunately I've not solved this problem yet. It occurs when your system CoreCLR and the local one have this kind of differences (e.g. in more recent CoreCLR a type was moved/renamed). I need to figure out how to 100% use only local CoreCLR when I do restore & publish. Currently it uses the latest system dotnet sdk & runtime to restore and then replaces some binaries with the local ones.

I suspect that I should use --fx-version switch (but it's not available yet?)

As a workaround - update to the latest daily build of CoreCLR and update your local coreclr to the master.