pose: System.InvalidProgramException when trying to shim DateTime.Now

Write the following program:

using System;
using Pose;

namespace ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {
            var dt = DateTime.Now;
            Shim dateTimeShim = Shim.Replace(() => DateTime.Now).With(() => new DateTime(2004, 4, 4));
            PoseContext.Isolate(() =>
                {
                    var time = DateTime.Now;
                    Console.WriteLine(time);
                },
                dateTimeShim);
        }
    }
}

Compile it with netcoreapp2.0 and run with .NET Core ⇒ throws an exception:

Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidProgramException: Common Language
 Runtime detected an invalid program.
   at dynamic_System.Text.Encoding_.ctor(Encoding , Int32 )
   at stub_ctor_System.Text.Encoding_.ctor(Encoding , Int32 , RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.Text.OSEncoding_.ctor(OSEncoding , Int32 )
   at stub_ctor_System.Text.OSEncoding_.ctor(Int32 , RuntimeMethodHandle , RuntimeTypeHandle )
   at stub_System.Text.EncodingHelper_GetSupportedConsoleEncoding(Int32 , RuntimeMethodHandle , RuntimeTypeHandle )
   at stub_System.ConsolePal_get_OutputEncoding(RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.Threading.LazyInitializer_EnsureInitializedCore(Encoding& , Object& , Func`1 )
   at stub_System.Threading.LazyInitializer_EnsureInitializedCore(Encoding& , Object& , Func`1 , RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.Threading.LazyInitializer_EnsureInitialized(Encoding& , Object& , Func`1 )
   at stub_System.Threading.LazyInitializer_EnsureInitialized(Encoding& , Object& , Func`1 , RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.Console_EnsureInitialized(Encoding& , Func`1 )
   at stub_System.Console_EnsureInitialized(Encoding& , Func`1 , RuntimeMethodHandle , RuntimeTypeHandle )
   at stub_System.Console_get_OutputEncoding(RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.ConsolePal_GetUseFileAPIs(Int32 )
   at stub_System.ConsolePal_GetUseFileAPIs(Int32 , RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.ConsolePal_GetStandardFile(Int32 , FileAccess )
   at stub_System.ConsolePal_GetStandardFile(Int32 , FileAccess , RuntimeMethodHandle , RuntimeTypeHandle )
   at stub_System.ConsolePal_OpenStandardOutput(RuntimeMethodHandle , RuntimeTypeHandle )
   at stub_System.Console_OpenStandardOutput(RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.Console+<>c_<get_Out>b__25_0(<>c )
   at dynamic_System.Threading.LazyInitializer_EnsureInitializedCore(TextWriter& , Object& , Func`1 )
   at stub_System.Threading.LazyInitializer_EnsureInitializedCore(TextWriter& , Object& , Func`1 , RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.Threading.LazyInitializer_EnsureInitialized(TextWriter& , Object& , Func`1 )
   at stub_System.Threading.LazyInitializer_EnsureInitialized(TextWriter& , Object& , Func`1 , RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.Console_EnsureInitialized(TextWriter& , Func`1 )
   at stub_System.Console_EnsureInitialized(TextWriter& , Func`1 , RuntimeMethodHandle , RuntimeTypeHandle )
   at stub_System.Console_get_Out(RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_System.Console_WriteLine(Object )
   at stub_System.Console_WriteLine(Object , RuntimeMethodHandle , RuntimeTypeHandle )
   at dynamic_ConsoleApp4.Program+<>c_<Main>b__0_2(<>c )
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Delegate.DynamicInvokeImpl(Object[] args)
   at Pose.PoseContext.Isolate(Action entryPoint, Shim[] shims)
   at ConsoleApp4.Program.Main(String[] args) in T:\Temp\ConsoleApp4\ConsoleApp4\Program.cs:line 12