[IronPython] Error only from Test Case

Dino Viehland dinov at microsoft.com
Thu Oct 23 23:00:20 CEST 2008

Ok, I've opened a work item on CodePlex to track it (http://www.codeplex.com/IronPython/WorkItem/View.aspx?WorkItemId=19128).  I should have done that last time :)  We'll need to investigate this and see what's going on but I think it'll have to wait until after 2.0 at this point.

From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Matt Beckius
Sent: Thursday, October 23, 2008 1:47 PM
To: Discussion of IronPython
Subject: Re: [IronPython] Error only from Test Case

We're NUnit and TypeMock.
On Thu, Oct 23, 2008 at 4:38 PM, Dino Viehland <dinov at microsoft.com<mailto:dinov at microsoft.com>> wrote:

Are you using NUnit or NDepend?  There's an issue (that we believe is related to how the assemblies are being loaded) which we haven't tracked down just yet: http://www.mail-archive.com/users@lists.ironpython.com/msg07328.html

Running the same code outside of NUnit or NDepend should work.

From: users-bounces at lists.ironpython.com<mailto:users-bounces at lists.ironpython.com> [mailto:users-bounces at lists.ironpython.com<mailto:users-bounces at lists.ironpython.com>] On Behalf Of Matt Beckius
Sent: Thursday, October 23, 2008 1:30 PM
To: users at lists.ironpython.com<mailto:users at lists.ironpython.com>
Subject: [IronPython] Error only from Test Case

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,


Matt B.


        public void Statements()


            var e = new IPEngine();


            var script = "import System\nfrom System import *\nx = 'kosher'\nprint 'test'";




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();



            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)



            var source = Engine.CreateScriptSourceFromString(expression, SourceCodeKind.Expression);

            return source.Execute<T>(Scope);


        public void Execute(string statements)



            var source = engine.CreateScriptSourceFromString(statements, SourceCodeKind.Statements);



        public string Output




                using (var sr = new StreamReader(ms))


                    ms.Position = 0;

                    return sr.ReadToEnd();





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