[IronPython] Possible bug in interpreter

[Dan Eloff]

This error is exploding all around me. I can get you a dozen more
stack traces from different places in my code. There's some kind of
unpacking happening (at
Microsoft.Scripting.Interpretation.Interpreter.InterpretTryStatement(InterpreterState
state, Expression expr) ?) that is breaking a lot of things. I'd love
to know what is causing it so I can either avoid it, or patch it so I
can move on. Here's another trace that may be useful.

-Dan

TypeError: argument of type 'Planet' is not iterable
beskar\namespace.py
Line 83:
Line 84:     def has(self, key):
Line 85:         return key in self.ns or hasattr(self.ns, key)
Line 86:
Line 87:     def get(self, key):

TypeError
at has in beskar\namespace.py, line 85
at __getitem__ in beskar\context.py, line 53
at RightColumn in <string>, line 41
at body in <string>, line 189
at render in beskar\template.py, line 18
at load_xaml in game\templates\__init__.py, line 13
at __init__ in game\planet.py, line 11
at <lambda$65> in game\window_manager.py, line 60
at ShowTab in game\tabcontrol.py, line 85
at OnTabChanged in game\tabcontrol.py, line 101
at __call__ in game\event.py, line 41
at <lambda$53> in game\tabcontrol.py, line 34
CLR Stack Trace:
   at Microsoft.Scripting.Interpretation.Interpreter.InterpretTryStatement(InterpreterState
state, Expression expr)
   at Microsoft.Scripting.Interpretation.Interpreter.Interpret(InterpreterState
state, Expression expr)
   at Microsoft.Scripting.Interpretation.Interpreter.InterpretAndCheckFlow(InterpreterState
state, Expression node, Object& result)
   at Microsoft.Scripting.Interpretation.Interpreter.InterpretBlock(InterpreterState
state, Expression expr)
   at Microsoft.Scripting.Interpretation.Interpreter.Interpret(InterpreterState
state, Expression expr)
   at Microsoft.Scripting.Interpretation.Interpreter.InterpretScopeExpression(InterpreterState
state, Expression expr)
   at Microsoft.Scripting.Interpretation.Interpreter.Interpret(InterpreterState
state, Expression expr)
   at Microsoft.Scripting.Interpretation.Interpreter.InterpretScopeExpression(InterpreterState
state, Expression expr)
   at Microsoft.Scripting.Interpretation.Interpreter.Interpret(InterpreterState
state, Expression expr)
   at Microsoft.Scripting.Interpretation.Interpreter.Execute(InterpreterState
state, Expression expression)
   at Microsoft.Scripting.Interpretation.Interpreter.InterpretLambda(InterpreterState
parentState, LambdaExpression lambda, Object[] args, Object[] array)
   at Microsoft.Scripting.Interpretation.LambdaInvoker.Invoke(Object[]
args, Object[] array)
   at Interpreted_body_8(LambdaInvoker , Object )
   at _stub_$688##438(Closure , CallSite , CodeContext , Object , Object )
   at S$38.render$1313(Closure , Object self, Object namespaces)
   at S$38.render$1313(Closure , Object[] )
   at _stub_$3950##2498(Closure , CallSite , CodeContext , Object ,
Object , Object )
   at _stub_$3949##2497(Closure , CallSite , CodeContext , Object , Object )
   at S$26.load_xaml$926(Closure , Object template, Object namespaces)
   at S$26.load_xaml$926(Closure , Object[] )
   at _stub_$3471##2038(Closure , CallSite , CodeContext , Object ,
String , Object )
   at _stub_MatchCaller(Object , CallSite , Object[] )
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update4[T,T0,T1,T2,T3,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at S$79.__init__$2341(Closure , Object self, Object planet)
   at _stub_$2796##1366(Closure , CallSite , CodeContext , Object ,
Object , Object )
   at _stub_$690##440(Closure , CallSite , CodeContext , Object , Object )
   at _stub_MatchCaller(Object , CallSite , Object[] )
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update3[T,T0,T1,T2,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2)
   at _stub_$4051##2599(Closure , CallSite , CodeContext , Object , Object )
   at _stub_MatchCaller(Object , CallSite , Object[] )
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update3[T,T0,T1,T2,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2)
   at S$77.<lambda$65>$2329(Closure )
   at _stub_$375##345(Closure , CallSite , CodeContext , Object )
   at _stub_MatchCaller(Object , CallSite , Object[] )
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update2[T,T0,T1,TRet](CallSite
site, T0 arg0, T1 arg1)
   at S$72.ShowTab$2175(Closure , Object self, Object tab, Object silent)
   at _stub_$3434##2001(Closure , CallSite , CodeContext , Object ,
Object , Object , Object )
   at _stub_$2583##1153(Closure , CallSite , CodeContext , Object ,
Object , Object )
   at _stub_MatchCaller(Object , CallSite , Object[] )
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update4[T,T0,T1,T2,T3,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at S$72.OnTabChanged$2177(Closure , Object self, Object sender, Object e)
   at _stub_$705##455(Closure , CallSite , CodeContext , Object ,
Object , Object , Object )
   at _stub_$704##454(Closure , CallSite , CodeContext , Object ,
Object , Object )
   at _stub_MatchCaller(Object , CallSite , Object[] )
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update4[T,T0,T1,T2,T3,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at _stub_$2397##967(Closure , CallSite , CodeContext , Object ,
Object , Object )
   at S$14.__call__$665(Closure , Object self, Object sender, Object
event_args)
   at _stub_$705##455(Closure , CallSite , CodeContext , Object ,
Object , Object , Object )
   at _stub_$704##454(Closure , CallSite , CodeContext , Object ,
Object , Object )
   at _stub_MatchCaller(Object , CallSite , Object[] )
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update4[T,T0,T1,T2,T3,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at _stub_$4043##2591(Closure , CallSite , CodeContext , Object ,
Object , Object )
   at _stub_MatchCaller(Object , CallSite , Object[] )
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update4[T,T0,T1,T2,T3,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at S$72.<lambda$53>$2167(Closure , Object s, Object e)
   at _stub_$4038##2586(Closure , CallSite , CodeContext , Object ,
Object , Object )
   at _stub_MatchCaller(Object , CallSite , Object[] )
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update4[T,T0,T1,T2,T3,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at System.Void(Object, SelectionChangedEventArgs)(Object[] , Object
, SelectionChangedEventArgs )
   at System.Windows.Controls.ListBox.OnSelectionChanged(SelectionChangedEventArgs
e)
   at System.Windows.Controls.ListBox.ProcessSelectionPropertyChange(DependencyProperty
changedProperty, Object oldValue, Object newValue)
   at System.Windows.Controls.ListBox.OnSelectedItemChanged(Object
oldValue, Object newValue)
   at System.Windows.Controls.ListBox.OnSelectedItemChanged(DependencyObject
d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty
dp, Object newValue, Object oldValue)
   at System.Windows.DependencyObject.SetValueInternal(DependencyProperty
dp, Object value, Boolean isSetByStyle, Boolean isSetByBuiltInStyle)
   at System.Windows.DependencyObject.SetValueInternal(DependencyProperty
dp, Object value)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp,
Object value)
   at System.Windows.Controls.ListBox.set_SelectedItem(Object value)
   at System.Windows.Controls.ListBox.SetSelectedItem(Object item)
   at System.Windows.Controls.ListBox.NotifyListItemClicked(ListBoxItem
listBoxItem)
   at System.Windows.Controls.ListBoxItem.OnMouseLeftButtonDown(MouseButtonEventArgs
e)
   at System.Windows.Controls.ListBoxItem.<.ctor>b__0(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)