# 0.9.1 regression

**URL:** <https://www.ruby-forum.com/t/0-9-1-regression/176424>\
**Category:** IronRuby\
**Created:** [September 30, 2009, 10:57am UTC](https://www.ruby-forum.com/t/0-9-1-regression/176424 "2009-09-30T10:57:51Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![barby](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/c57346/32.png) [@barby](https://www.ruby-forum.com/u/barby)\
**Post date:** [September 30, 2009, 10:57am UTC](https://www.ruby-forum.com/t/0-9-1-regression/176424/1 "2009-09-30T10:57:51Z")

</div>

Hi  
I’d love to log this as a bug but I can’t track down why.

This is the code for a ResultFilter with IronRuby MVC

class LightspeedFilter \< ResultFilter

def on\_result\_executing(context)  
# put before result filtering code here  
end

def on\_result\_executed(context)  
context.controller.uow\_scope.dispose  
end  
end

I can see that it has a uow\_scope instance but as soon as I call dispose  
on  
it it fails which didn’t use to happen. I can’t reproduce the scenario  
in  
the console which makes it harder to figure out what is going wrong.  
I’ve  
also tried putting Dispose, dispose(true), Dispose(true) but none of  
them  
work.  
I’m going to pull that code out and replace it with another OR/M.

[NullReferenceException: Object reference not set to an instance of an  
object.]

Microsoft.Scripting.Actions.Calls.OverloadResolver.MakeBindingTarget(CandidateSet  
targetSet) +580  
Microsoft.Scripting.Actions.Calls.OverloadResolver.ResolveOverload(String  
methodName, IList`1 methods, NarrowingLevel minLevel, NarrowingLevel  
maxLevel) +359

IronRuby.Runtime.Calls.RubyMethodGroupBase.ResolveOverload(MetaObjectBuilder  
metaBuilder, CallArguments args, String name, IList`1 overloads,  
SelfCallConvention callConvention, Boolean implicitProtocolConversions,  
RubyOverloadResolver& resolver) +118

IronRuby.Runtime.Calls.RubyMethodGroupBase.BuildCallNoFlow(MetaObjectBuilder  
metaBuilder, CallArguments args, String name, IList`1 overloads,  
SelfCallConvention callConvention, Boolean implicitProtocolConversions)  
+68

IronRuby.Runtime.Calls.RubyMethodGroupInfo.BuildCallNoFlow(MetaObjectBuilder  
metaBuilder, CallArguments args, String name) +279  
IronRuby.Runtime.Calls.RubyMemberInfo.BuildCall(MetaObjectBuilder  
metaBuilder, CallArguments args, String name) +42  
IronRuby.Runtime.Calls.RubyCallAction.BuildCall(MetaObjectBuilder  
metaBuilder, String methodName, CallArguments args, Boolean  
defaultFallback,  
Boolean callClrMethods) +301  
IronRuby.Runtime.Calls.RubyCallAction.Build(MetaObjectBuilder  
metaBuilder, CallArguments args, Boolean defaultFallback) +56  
IronRuby.Runtime.Calls.RubyMetaBinder.Bind(DynamicMetaObject  
scopeOrContextOrTarget, DynamicMetaObject[] args) +216  
System.Dynamic.DynamicMetaObjectBinder.Bind(Object[] args,  
ReadOnlyCollection`1 parameters, LabelTarget returnLabel) +730 IronRuby.Runtime.Calls.RubyMetaBinder.BindDelegate(CallSite`1 site,  
Object[] args) +606  
IronRuby.Runtime.Calls.RubyCallAction.BindDelegate(CallSite`1 site, Object[] args) +1434 System.Runtime.CompilerServices.CallSiteBinder.BindCore(CallSite`1  
site,  
Object[] args) +130  
System.Dynamic.UpdateDelegates.UpdateAndExecute2(CallSite site, T0  
arg0,  
T1 arg1) +1195

ℑℜ;on\_result\_executed;lightspeed\_filter.rb;7;71$56.ℑℜ;on\_result\_executed;lightspeed\_filter.rb;7;71(Object  
#self, Proc #block, Object context) in  
C:\dev\ironruby\_book\Samples\MockChat\MockChat\Filters/lightspeed\_filter.rb:9  
Microsoft.Scripting.Utils.InvokeHelper`4.Invoke(Object arg0, Object  
arg1,  
Object arg2) +374  
Microsoft.Scripting.Utils.ReflectedCaller.Invoke(Object[] args) +239  
Microsoft.Scripting.Interpreter.CallInstruction.Run(InterpretedFrame  
frame) +140

Microsoft.Scripting.Interpreter.Interpreter.RunInstructions(InterpretedFrame  
frame) +90  
Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame  
frame)  
+104  
Microsoft.Scripting.Interpreter.LightLambda.Run4(T0 arg0, T1 arg1, T2  
arg2, T3 arg3) +393  
IronRuby.Runtime.Calls.InterpretedFuncDispatcher`4.Invoke(CallSite  
callSite, T0 arg0, T1 arg1, T2 arg2) +580  
System.Dynamic.UpdateDelegates.UpdateAndExecute3(CallSite site, T0  
arg0,  
T1 arg1, T2 arg2) +1277

IronRuby.Classes.RubyResultFilter$1.OnResultExecuted(ResultExecutedContext  
)  
+86

System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter  
filter, ResultExecutingContext preContext, Func`1 continuation) +273  
System.Web.Mvc.\<\>c\_\_DisplayClass13.b\_\_10()  
+19

System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext  
controllerContext, IList`1 filters, ActionResult actionResult) +178  
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext  
controllerContext, String actionName) +399  
System.Web.Mvc.Controller.ExecuteCore() +126  
IronRuby.Classes.RubyController$2.ExecuteCore() +111  
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext)  
+27  
System.Web.Mvc.IronRuby.Controllers.RubyController.Execute(RequestContext  
requestContext) in  
C:\dev\ironrubymvc\IronRubyMvc\Controllers\RubyController.cs:76  
IronRuby.Classes.RubyController$2.Execute(RequestContext ) +120

System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext  
requestContext) +7  
System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase httpContext)  
+151  
System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext httpContext) +57

System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext  
httpContext) +7  
System.Web.Mvc.MvcHttpHandler.VerifyAndProcessRequest(IHttpHandler  
httpHandler, HttpContextBase httpContext) +61  
System.Web.Routing.UrlRoutingHandler.ProcessRequest(HttpContextBase  
httpContext) +111  
System.Web.Routing.UrlRoutingHandler.ProcessRequest(HttpContext  
httpContext) +40

System.Web.Routing.UrlRoutingHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext  
context) +7  
ASP.default\_aspx.Page\_Load(Object sender, EventArgs e) in  
c:\dev\ironruby\_book\Samples\MockChat\MockChat\Default.aspx:13  
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object  
o,  
Object t, EventArgs e) +14  
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object  
sender,  
EventArgs e) +35  
System.Web.UI.Control.OnLoad(EventArgs e) +99  
System.Web.UI.Control.LoadRecursive() +50  
System.Web.UI.Page.ProcessRequestMain(Boolean  
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)  
+627

* * *

Met vriendelijke groeten - Best regards - Salutations  
Ivan Porto C.  
Blog: [http://flanders.co.nz](http://flanders.co.nz)  
Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim)  
Author of IronRuby in Action ([http://manning.com/carrero](http://manning.com/carrero))