Looks like I missed it somehow - I've filed as bug #16831 (http://www.codeplex.com/IronPython/WorkItem/View.aspx?WorkItemId=16831). We definitely should fix it, generally the code should work the same the 1st time through and the 2nd time through :).
From: Jimmy Schementi Sent: Wednesday, May 28, 2008 11:44 AM To: Discussion of IronPython; Dino Viehland Subject: Re: [IronPython] Silverlight: Cannot cast from 'System.Nullable`1[System.Boolean]' to 'System.Boolean' Yay for finding a IronPython bug =) Does it work if you do IsChecked = None as well? Dino, do you know about this? ~js On 5/17/08 11:46 AM, "Michael Foord" <[EMAIL PROTECTED]> wrote: This is cool. I have a checkbox in my silverlight UI. I have a code path that does: if self.remember_me.IsChecked: PutStored(username, password) The *second* time through this code path it blows up with the exception below. I can fix it by changing the test to: if self.remember_me.IsChecked == True: PutStored(username, password) Which works fine, but I thought you might be interested. :-) Full traceback below... ArgumentException: Cannot cast from 'System.Nullable`1[System.Boolean]' to 'System.Boolean' ArgumentException at Microsoft.Scripting.Ast.LambdaCompiler.EmitCast(Type from, Type to) at Microsoft.Scripting.Ast.LambdaCompiler.Emit(UnaryExpression node) at Microsoft.Scripting.Ast.LambdaCompiler.EmitExpression(Expression node) at Microsoft.Scripting.Ast.LambdaCompiler.Emit(BinaryExpression node) at Microsoft.Scripting.Ast.LambdaCompiler.EmitExpression(Expression node) at Microsoft.Scripting.Ast.LambdaCompiler.EmitReturn(Expression expr) at Microsoft.Scripting.Ast.LambdaCompiler.Emit(ReturnStatement node) at Microsoft.Scripting.Ast.LambdaCompiler.EmitExpression(Expression node) at Microsoft.Scripting.Actions.StandardRule`1.Emit(LambdaCompiler cg, Label ifFalse) at Microsoft.Scripting.Actions.SmallRuleSet`1.MakeTarget(CodeContext context) at Microsoft.Scripting.Actions.RuleSet`1.GetOrMakeTarget(CodeContext context) at Microsoft.Scripting.Actions.DynamicSiteHelpers.UpdateSite[T](CodeContext callerContext, Object site, T& target, RuleSet`1& rules, StandardRule`1 rule) at Microsoft.Scripting.Actions.RuleTree`1.GetRuleMaybeExecute(CodeContext callerContext, Object[] args, Boolean execute, Object site, T& target, RuleSet`1& rules, Object& result) at Microsoft.Scripting.Actions.RuleTree`1.ExecuteRuleAndUpdateSite(CodeContext callerContext, Object[] args, Object site, T& target, RuleSet`1& rules, Object& result) at Microsoft.Scripting.Actions.RuleCache.ActionRuleCache.ExecuteRuleAndUpdateSite[T](CodeContext context, Object[] args, Object site, T& target, RuleSet`1& rules, Object& result) at Microsoft.Scripting.Actions.RuleCache.ExecuteRuleAndUpdateSite[T](CodeContext callerContext, DynamicAction action, Object[] args, Object site, T& target, RuleSet`1& rules, Object& result) at Microsoft.Scripting.Actions.ActionBinder.UpdateSiteAndExecute[T](CodeContext callerContext, DynamicAction action, Object[] args, Object site, T& target, RuleSet`1& rules) at Microsoft.Scripting.Actions.DynamicSite`2.UpdateBindingAndInvoke(CodeContext context, T0 arg0) at Microsoft.Scripting.Actions.DynamicSiteHelpers.UninitializedTargetHelper`7.Invoke1(DynamicSite`2 site, CodeContext context, T0 arg0) at Microsoft.Scripting.Actions.DynamicSite`2.Invoke(CodeContext context, T0 arg0) at _stub_##224(Closure , DynamicSite`2 , CodeContext , Object ) at Microsoft.Scripting.Actions.DynamicSite`2.Invoke(CodeContext context, T0 arg0) at S$3.onLogin$18(Closure , Object self, Object sender, Object event) at Microsoft.Scripting.Utils.InvokeHelper`5.Invoke(Object arg0, Object arg1, Object arg2, Object arg3) at Microsoft.Scripting.Utils.ReflectedCaller.InvokeInstance(Object instance, Object[] args) at Microsoft.Scripting.Ast.Interpreter.InvokeMethod(MethodInfo method, Object instance, Object[] parameters) at Microsoft.Scripting.Ast.Interpreter.InterpretMethodCallExpression(CodeContext context, Expression expr) at Microsoft.Scripting.Ast.Interpreter.Interpret(CodeContext context, Expression expr) at Microsoft.Scripting.Ast.Interpreter.InterpretReturnStatement(CodeContext context, Expression expr) at Microsoft.Scripting.Ast.Interpreter.Interpret(CodeContext context, Expression expr) at Microsoft.Scripting.Ast.Interpreter.Execute(CodeContext context, Expression expression) at Microsoft.Scripting.Actions.StandardRule`1.ExecuteTarget(Object site, CodeContext context, Object[] args) at Microsoft.Scripting.Actions.RuleTree`1.GetRuleMaybeExecute(CodeContext callerContext, Object[] args, Boolean execute, Object site, T& target, RuleSet`1& rules, Object& result) at Microsoft.Scripting.Actions.RuleTree`1.ExecuteRuleAndUpdateSite(CodeContext callerContext, Object[] args, Object site, T& target, RuleSet`1& rules, Object& result) at Microsoft.Scripting.Actions.RuleCache.ActionRuleCache.ExecuteRuleAndUpdateSite[T](CodeContext context, Object[] args, Object site, T& target, RuleSet`1& rules, Object& result) at Microsoft.Scripting.Actions.RuleCache.ExecuteRuleAndUpdateSite[T](CodeContext callerContext, DynamicAction action, Object[] args, Object site, T& target, RuleSet`1& rules, Object& result) at Microsoft.Scripting.Actions.ActionBinder.UpdateSiteAndExecute[T](CodeContext callerContext, DynamicAction action, Object[] args, Object site, T& target, RuleSet`1& rules) at Microsoft.Scripting.Actions.DynamicSite`5.UpdateBindingAndInvoke(CodeContext context, T0 arg0, T1 arg1, T2 arg2, T3 arg3) at Microsoft.Scripting.Actions.DynamicSiteHelpers.UninitializedTargetHelper`7.Invoke4(DynamicSite`5 site, CodeContext context, T0 arg0, T1 arg1, T2 arg2, T3 arg3) at Microsoft.Scripting.Actions.DynamicSite`5.Invoke(CodeContext context, T0 arg0, T1 arg1, T2 arg2, T3 arg3) at _stub_##217(Closure , DynamicSite`4 , CodeContext , Object , Object , Object ) at Microsoft.Scripting.Actions.DynamicSite`4.Invoke(CodeContext context, T0 arg0, T1 arg1, T2 arg2) at System.Void(Object, RoutedEventArgs), using PythonBinder##183(Closure , Object , RoutedEventArgs ) at System.Windows.Controls.Primitives.ButtonBase.OnClick() at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e) at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(Object sender, MouseButtonEventArgs e) at System.Windows.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args) at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName) ? Hide Debugging Output Michael Foord http://www.ironpythoninaction.com/ _______________________________________________ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
_______________________________________________ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
