Compilation incompleteness for general traits

[MikaelMayer]

Dafny version

latest-nightly

Code to produce this issue

trait GeneralTrait {
}

datatype Test = Test(x: GeneralTrait)

newtype I extends GeneralTrait = x: int | true

method AcceptType<T(==)>(a: T, b: T) returns (c: bool) {
  return a == b;
}

method Caller(t: Test) returns (b: bool) {
  b := AcceptType<Test>(t, t);
}

method Main() {
  var b := Caller(Test(1 as I));
  print b;
}

Command to run and resulting output

$ dafny run -t:cs --type-system-refresh --general-traits=full generalTrait.dfy

Dafny program verifier finished with 4 verified, 0 errors
Failed to compile C# source code using 'dotnet build C:\Users\mimayere\Documents\Dafny tests\generalTrait.csproj -o C:\Users\mimayere\Documents\Dafny tests'. Command output was:
  Determining projects to restore...
  All projects are up-to-date for restore.
C:\Users\mimayere\Documents\Dafny tests\generalTrait.cs(5718,7): warning CS0162: Unreachable code detected [C:\Users\mimayere\Documents\Dafny tests\generalTrait.csproj]
C:\Users\mimayere\Documents\Dafny tests\generalTrait.cs(5732,32): error CS1503: Argument 1: cannot convert from 'System.Numerics.BigInteger' to '_module.GeneralTrait' [C:\Users\mimayere\Documents\Dafny tests\generalTrait.csproj]

Build FAILED.

C:\Users\mimayere\Documents\Dafny tests\generalTrait.cs(5718,7): warning CS0162: Unreachable code detected [C:\Users\mimayere\Documents\Dafny tests\generalTrait.csproj]
C:\Users\mimayere\Documents\Dafny tests\generalTrait.cs(5732,32): error CS1503: Argument 1: cannot convert from 'System.Numerics.BigInteger' to '_module.GeneralTrait' [C:\Users\mimayere\Documents\Dafny tests\generalTrait.csproj]
    1 Warning(s)
    1 Error(s)

Time Elapsed 00:00:09.07

What happened?

There should be no compilation issue

What type of operating system are you experiencing the problem on?

Windows