Unboxing of Nullable<T> is not implemented

Area of Cosmos - What area of Cosmos are we dealing with?

BCL tests

Expected Behaviour - What do you think that should happen?

The unboxing should succeed and HasValue should be true.

Actual Behaviour - What unexpectedly happens?

We know it is not implemented so this is totally expected but…

09:40:33.367007 Error: Error: Exception: System.Exception: Error compiling method ‘SystemVoidBoxingTestsKernelTestUnboxingNullable’: System.NotImplementedException: The method or operation is not implemented. 09:40:33.405042 Error: at Cosmos.IL2CPU.X86.IL.Unbox.Execute(_MethodInfo aMethod, ILOpCode aOpCode) in C:\Users\fano\Documents\GitHub\Cosmos\IL2CPU\source\Cosmos.IL2CPU\IL\Unbox.cs:line 78 09:40:33.405973 Error: at Cosmos.IL2CPU.X86.IL.Unbox_Any.Execute(_MethodInfo aMethod, ILOpCode aOpCode) in C:\Users\fano\Documents\GitHub\Cosmos\IL2CPU\source\Cosmos.IL2CPU\IL\Unbox_Any.cs:line 22

Reproduction - How did you get this error to appear?

        private void TestUnboxingNullable()
        {
            object x = 42;

            int? y = (int?)x;

            Assert.IsTrue(y.HasValue == true, "Unboxing of Nullable<int> does not work");
        }

Version - Were you using the User Kit or Dev Kit? And what User Kit version or Dev Kit commit (Cosmos, IL2CPU, X#)?

Last devKit

[PlatinumLyfe]

I assume you guys look at CoreRT ? https://github.com/dotnet/corert

Seems there could be a lot of overlap between the two, because they compile for native operation on any OS - which means they’ve probably had to deal with a lot of the issues you have on converting C# to CPU commands/assembler.

[github-actions[bot]]

As this issue has received no new activity, it has been marked as stale