[IronPython] Error only from Test Case

[Matt Beckius]

The test below fails (see stacktrace).  If I take the exact same code and
execute from a running program,it works just fine.  Any suggestions,

TIA

Matt B.

        [Test]
        public void Statements()
        {
            var e = new IPEngine();
            e.Scope.SetVariable("x","testing");
            var script = "import System\nfrom System import *\nx =
'kosher'\nprint 'test'";
            e.Execute(script);
            Assert.AreEqual("kosher",e.Scope.GetVariable<string>("x"));
        }


failed: System.InvalidProgramException : Common Language Runtime detected an
invalid program.
at
Microsoft.Scripting.Actions.MatchCaller.Call6[T0,T1,T2,T3,T4,T5,TRet](Func`8
target, CallSite site, Object[] args)
at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
at
Microsoft.Scripting.Actions.UpdateDelegates.Update6[T,T0,T1,T2,T3,T4,T5,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5)
at IronPython.Runtime.Importer.Import(CodeContext context, String fullName,
PythonTuple from, Int32 level)
at IronPython.Runtime.Operations.PythonOps.ImportTop(CodeContext context,
String fullName, Int32 level)
at <module>$1##1(Closure , Scope , LanguageContext )
at
Microsoft.Scripting.Runtime.OptimizedScriptCode.InvokeTarget(LambdaExpression
code, Scope scope)
at Microsoft.Scripting.ScriptCode.Run(Scope scope)
at Microsoft.Scripting.SourceUnit.Execute(Scope scope, ErrorSink errorSink)
at Microsoft.Scripting.Hosting.ScriptSource.Execute(ScriptScope scope)

    public class IPEngine
    {
        #region Member Vars

        private readonly ScriptEngine engine;
        private readonly ScriptScope scope;
        private MemoryStream ms;

        #endregion Member Vars

        public IPEngine()
        {
            engine = Python.CreateEngine();
            engine.ImportModule("clr");
            engine.Runtime.LoadAssembly(typeof(System.String).Assembly);
            scope = Engine.CreateScope();
        }

        public ScriptEngine Engine
        {
            get { return engine; }
        }

        public ScriptScope Scope
        {
            get { return scope; }
        }

        public void SetupOutput()
        {
            ms = new MemoryStream();
            engine.Runtime.IO.SetOutput(ms, Encoding.UTF8);
            //engine.Runtime.IO.SetErrorOutput(ms, Encoding.UTF8);
        }

        /// <summary>
        /// Evaluates a single expressoin
        /// </summary>
        /// <typeparam name="T">Return Type</typeparam>
        /// <param name="expression">Expressions to Eval</param>
        /// <returns>T</returns>
        public T Eval<T>(string expression)
        {
            SetupOutput();
            var source = Engine.CreateScriptSourceFromString(expression,
SourceCodeKind.Expression);
            return source.Execute<T>(Scope);
        }

        public void Execute(string statements)
        {
            SetupOutput();
            var source = engine.CreateScriptSourceFromString(statements,
SourceCodeKind.Statements);
            source.Execute(scope);
        }

        public string Output
        {
            get
            {
                using (var sr = new StreamReader(ms))
                {
                    ms.Position = 0;
                    return sr.ReadToEnd();
                }
            }
        }
    }

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