Akka.FSharp.Tests.InfrastructureTests.IActorRef should be possible to use as a Key [FAIL]
      System.ArgumentException : Expression of type 'Microsoft.FSharp.Core.FSharpFunc`2[Microsoft.FSharp.Core.Unit,Akka.FSharp.Actors+FunActor`2[System.Object,System.Object]]' cannot be used for return type 'Akka.
FSharp.Actors+FunActor`2[System.Object,System.Object]'
      Stack Trace:
           at System.Linq.Expressions.Expression.ValidateLambdaArgs(Type delegateType, Expression& body, ReadOnlyCollection`1 parameters)
           at System.Linq.Expressions.Expression.Lambda(Type delegateType, Expression body, String name, Boolean tailCall, IEnumerable`1 parameters)
           at System.Linq.Expressions.Expression.Lambda(Type delegateType, Expression body, IEnumerable`1 parameters)
           at Microsoft.FSharp.Linq.RuntimeHelpers.LeafExpressionConverter.ConvExprToLinqInContext(ConvEnv env, FSharpExpr inp)
           at Microsoft.FSharp.Linq.RuntimeHelpers.LeafExpressionConverter.QuotationToLambdaExpression[T](FSharpExpr`1 e)
           at Akka.FSharp.Spawn.spawnOpt[Message,Returned](IActorRefFactory actorFactory, String name, FSharpFunc`2 f, FSharpList`1 options)
           at Akka.FSharp.Tests.InfrastructureTests.IActorRef should be possible to use as a Key()
    Akka.FSharp.Tests.ApiTests.actor that accepts _ will receive string message [FAIL]
      System.ArgumentException : Expression of type 'Microsoft.FSharp.Core.FSharpFunc`2[Microsoft.FSharp.Core.Unit,Akka.FSharp.Actors+FunActor`2[System.Object,System.Object]]' cannot be used for return type 'Akka.
FSharp.Actors+FunActor`2[System.Object,System.Object]'
      Stack Trace:
           at System.Linq.Expressions.Expression.ValidateLambdaArgs(Type delegateType, Expression& body, ReadOnlyCollection`1 parameters)
           at System.Linq.Expressions.Expression.Lambda(Type delegateType, Expression body, String name, Boolean tailCall, IEnumerable`1 parameters)
           at System.Linq.Expressions.Expression.Lambda(Type delegateType, Expression body, IEnumerable`1 parameters)
           at Microsoft.FSharp.Linq.RuntimeHelpers.LeafExpressionConverter.ConvExprToLinqInContext(ConvEnv env, FSharpExpr inp)
           at Microsoft.FSharp.Linq.RuntimeHelpers.LeafExpressionConverter.QuotationToLambdaExpression[T](FSharpExpr`1 e)
           at Akka.FSharp.Spawn.spawnOpt[Message,Returned](IActorRefFactory actorFactory, String name, FSharpFunc`2 f, FSharpList`1 options)
           at Akka.FSharp.Tests.ApiTests.actor that accepts _ will receive string message()