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/
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