Type 'IronPython.Runtime.Types.PythonType' cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed.

What steps will reproduce the problem?
1. Write this code in C#:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using IronPython.Hosting;

namespace IronPythonTalonTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var pyEngine = Python.CreateEngine();
            List<string> m_searchPaths = new List<string>();
            m_searchPaths.Add(AppDomain.CurrentDomain.BaseDirectory + @"\talon-master");
            m_searchPaths.Add(AppDomain.CurrentDomain.BaseDirectory + @"\Lib");
            m_searchPaths.Add(@"D:\Downloads\ironclad-v2.6.0rc1-bin");
            m_searchPaths.Add(@"D:\Downloads\regex-2015.05.10\");
            dynamic scope = pyEngine.CreateScope();
            pyEngine.SetSearchPaths(m_searchPaths);
            try
            {
                pyEngine.ExecuteFile(@"C:\Users\Zoneh\Documents\Visual Studio 2013\Projects\IronPythonTalonTest\IronPythonTalonTest\bin\Debug\talon-master\build\lib\test_script.py");
            }
            catch (Exception ex)
            {
                var exc = ex;
            }
        }
    }
}

2. Write this code in test_script.py:

import ironclad
import talon
from talon import quotations
talon.init()
text =  """Reply
-----Original Message-----
Quote"""
reply = quotations.extract_from(text, 'text/plain')
reply = quotations.extract_from_plain(text)

3.
Run the code in C#
What is the expected output? What do you see instead?

I expect to get a variable in my dynamic scope reply that has original message 
turned down. 

Instead i get an exception in C#:

Type 'IronPython.Runtime.Types.PythonType' cannot be marshaled as an unmanaged 
structure; no meaningful size or offset can be computed.

What version of the product are you using? On what operating system?
Latest 2.6.0rc1 IronClad. Windows 8.1 64bit

This is the stack trace:

   at System.Runtime.InteropServices.Marshal.SizeOfHelper(Type t, Boolean throwIfNotMarshalable)
   at System.Runtime.InteropServices.Marshal.SizeOf(Object structure)
   at System.Runtime.InteropServices.Marshal.SizeOf[T](T structure)
   at Microsoft.Scripting.Interpreter.FuncCallInstruction`2.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.LightLambda.Run4[T0,T1,T2,T3,TRet](T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at System.Dynamic.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)
   at Microsoft.Scripting.Interpreter.FuncCallInstruction`6.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.LightLambda.Run4[T0,T1,T2,T3,TRet](T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at IronPython.Compiler.Ast.CallExpression.Invoke1Instruction.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.LightLambda.Run1[T0,TRet](T0 arg0)
   at IronPython.Compiler.RuntimeScriptCode.InvokeTarget(Scope scope)
   at IronPython.Compiler.RuntimeScriptCode.Run(Scope scope)
   at IronPython.Runtime.PythonContext.InitializeModule(String fileName, ModuleContext moduleContext, ScriptCode scriptCode, ModuleOptions options)
   at IronPython.Runtime.PythonContext.CompileModule(String fileName, String moduleName, SourceUnit sourceCode, ModuleOptions options, ScriptCode& scriptCode)
   at IronPython.Runtime.PythonContext.CompileModule(String fileName, String moduleName, SourceUnit sourceCode, ModuleOptions options)
   at IronPython.Runtime.Importer.LoadFromSourceUnit(CodeContext context, SourceUnit sourceCode, String name, String path)
   at IronPython.Runtime.Importer.LoadModuleFromSource(CodeContext context, String name, String path)
   at IronPython.Runtime.Importer.LoadPackageFromSource(CodeContext context, String name, String path)
   at IronPython.Runtime.Importer.LoadFromDisk(CodeContext context, String name, String fullName, String str)
   at IronPython.Runtime.Importer.ImportFromPathHook(CodeContext context, String name, String fullName, List path, Func`5 defaultLoader)
   at IronPython.Runtime.Importer.ImportFromPath(CodeContext context, String name, String fullName, List path)
   at IronPython.Runtime.Importer.ImportTopAbsolute(CodeContext context, String name)
   at IronPython.Runtime.Importer.ImportModule(CodeContext context, Object globals, String modName, Boolean bottom, Int32 level)
   at IronPython.Modules.Builtin.__import__(CodeContext context, String name, Object globals, Object locals, Object fromlist, Int32 level)
   at Microsoft.Scripting.Interpreter.FuncCallInstruction`7.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.LightLambda.Run7[T0,T1,T2,T3,T4,T5,T6,TRet](T0 arg0, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6)
   at System.Dynamic.UpdateDelegates.UpdateAndExecute6[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.ImportLightThrow(CodeContext context, String fullName, PythonTuple from, Int32 level)
   at IronPython.Runtime.Operations.PythonOps.ImportTop(CodeContext context, String fullName, Int32 level)
   at Microsoft.Scripting.Interpreter.FuncCallInstruction`4.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.LightLambda.Run2[T0,T1,TRet](T0 arg0, T1 arg1)
   at IronPython.Compiler.PythonScriptCode.RunWorker(CodeContext ctx)
   at IronPython.Compiler.PythonScriptCode.Run(Scope scope)
   at IronPython.Compiler.RuntimeScriptCode.InvokeTarget(Scope scope)
   at IronPython.Compiler.RuntimeScriptCode.Run(Scope scope)
   at Microsoft.Scripting.SourceUnit.Execute(Scope scope, ErrorSink errorSink)
   at Microsoft.Scripting.SourceUnit.Execute(Scope scope)
   at Microsoft.Scripting.Hosting.ScriptSource.Execute(ScriptScope scope)
   at Microsoft.Scripting.Hosting.ScriptEngine.ExecuteFile(String path, ScriptScope scope)
   at Microsoft.Scripting.Hosting.ScriptEngine.ExecuteFile(String path)
   at IronPythonTalonTest.Program.Main(String[] args) in c:\Users\Zoneh\Documents\Visual Studio 2013\Projects\IronPythonTalonTest\IronPythonTalonTest\Program.cs:line 25
Original issue reported on code.google.com by zoneh....@gmail.com on 22 May 2015 at 11:20
mdrubin / ironclad

Type 'IronPython.Runtime.Types.PythonType' cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed. #34
