[IronPython] InvalidProgramException testing hosting under NUnit

[Paul Turbett]

Hi

Was there ever a solution to this problem? I'm getting the same thing, 
though not with NUnit. To port my IP interface from 1.1 to 2.0 (beta 1), 
I created a separate test application, which worked fine. However I'm 
merging the code into my "real" application, but I'm not able to create 
a ScriptEngine.

_runtime = ScriptRuntime.Create();
string[] languages = _runtime.GetRegisteredLanguageIdentifiers();   // 
finds 18 languages, including "py"
_engine = _runtime.GetEngine("py");  // <--- throws an exception

Microsoft.Scripting.Runtime.InvalidImplementationException was unhandled
  Message="Type 'IronPython.Runtime.PythonContext' doesn't provide a 
suitable public constructor or its implementation is faulty."
  Source="Microsoft.Scripting"
  StackTrace:
       at 
Microsoft.Scripting.Utils.ReflectionUtils.CreateInstance[T](Type 
actualType, Object[] args)
       at 
Microsoft.Scripting.Runtime.ScriptDomainManager.LanguageRegistration.LoadLanguageContext(ScriptDomainManager 
manager)
       at 
Microsoft.Scripting.Runtime.ScriptDomainManager.TryGetLanguageContext(String 
languageId, LanguageContext& languageContext)
       at Microsoft.Scripting.Hosting.ScriptRuntime.TryGetEngine(String 
languageId, ScriptEngine& engine)
       at Microsoft.Scripting.Hosting.ScriptRuntime.GetEngine(String 
languageId)
       at Utilities.OSEPython..ctor(FileStream log) in 
C:\Projects\Utils\PythonEngine.cs:line 121
       at Utilities.PythonFactory.Create(Boolean log) in 
C:\Projects\Utils\PythonEngine.cs:line 70
        ...

Not sure if it's important, but the application uses a few assemblies, 
and the IP wrapper classes are in a separate assembly to where they are 
used.

Thanks, Paul     


Fernando Correia wrote:
> 2008/3/12, Dino Viehland <dinov at exchange.microsoft.com>:
>   
>> There's an inner exception here (probably from Importer.cs in MakeImportSite) but there isn't much info on it.   Could you run it under a debugger and get that original stack trace?  It's not clear to me why we would blow up there.
>>     
>
>
> Thanks for your help.
>
> Sorry for some text in Portuguese below. I hope it doesn't get in the way.
>
> The exception occurs within class ReflectionUtils, method CreateInstance<T>.
>
> Line 127 is:
> return (T)Activator.CreateInstance(actualType, args);
>
> This in turns ends up calling the constructor public
> PythonContext(ScriptDomainManager/*!*/ manager) in class
> PythonContext.
>
> Line 120 is:
> _importer = new Importer(this);
>
> A step into this line will cause the exception.
>
> The stack trace of the innermost exception
> ([System.InvalidProgramException] = {"Common Language Runtime detectou
> um programa inválido."}) is:
>
>    em Microsoft.Scripting.RuntimeHelpers.CreateSimpleCallSite[T0,T1,T2,T3,T4,R]()
>    em IronPython.Runtime.Importer.MakeImportSite() na
> C:\Temp\IronPython v2.0 Alpha
> 8\IronPython-2.0A8-Src\IronPython-2.0A8\Src\IronPython\Runtime\Importer.cs:linha
> 74
>    em IronPython.Runtime.Importer..cctor() na C:\Temp\IronPython v2.0
> Alpha 8\IronPython-2.0A8-Src\IronPython-2.0A8\Src\IronPython\Runtime\Importer.cs:linha
> 49
>
> The stack trace of the outermost exception (base
> {System.ApplicationException} = {"Uma exceção foi acionada pelo
> destino de uma chamada."}) is:
>
>    em System.RuntimeMethodHandle._InvokeConstructor(Object[] args,
> SignatureStruct& signature, IntPtr declaringType)
>    em System.RuntimeMethodHandle.InvokeConstructor(Object[] args,
> SignatureStruct signature, RuntimeTypeHandle declaringType)
>    em System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags
> invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
>    em System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr,
> Binder binder, Object[] args, CultureInfo culture, Object[]
> activationAttributes)
>    em System.Activator.CreateInstance(Type type, BindingFlags
> bindingAttr, Binder binder, Object[] args, CultureInfo culture,
> Object[] activationAttributes)
>    em System.Activator.CreateInstance(Type type, Object[] args)
>    em Microsoft.Scripting.Utils.ReflectionUtils.CreateInstance[T](Type
> actualType, Object[] args) na C:\Temp\IronPython v2.0 Alpha
> 8\IronPython-2.0A8-Src\IronPython-2.0A8\Src\Microsoft.Scripting\Utils\ReflectionUtils.cs:linha
> 127
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