alice-teacher world in Aug Alice gets null pointer exception running in Dec Alice
Rikki Fletcher
fletcher at csusm.edu
Tue Jan 24 16:52:53 EST 2012
Attached is a world that crashes after the first ball gets thrown up.
Not all worlds crash - but it happens with more than just this one. Any
ideas?
Thanks.
"Error during simulation"
Error during simulation.
Alice version: 2.2 12/01/2011
Throwable that caused the error:
java.lang.NullPointerException
at
edu.cmu.cs.stage3.alice.core.question.DistanceTo.getValue(DistanceTo.java:35)
at
edu.cmu.cs.stage3.alice.core.question.SubjectObjectQuestion.getValue(SubjectObjectQuestion.java:103)
at
edu.cmu.cs.stage3.alice.core.question.SubjectQuestion.getValue(SubjectQuestion.java:36)
at
edu.cmu.cs.stage3.alice.core.Property.evaluateIfNecessary(Property.java:380)
at edu.cmu.cs.stage3.alice.core.Property.getValue(Property.java:407)
at
edu.cmu.cs.stage3.alice.core.question.userdefined.PropertyAssignment.execute(PropertyAssignment.java:73)
at
edu.cmu.cs.stage3.alice.core.question.userdefined.UserDefinedQuestion.getValue(UserDefinedQuestion.java:56)
at
edu.cmu.cs.stage3.alice.core.question.userdefined.CallToUserDefinedQuestion.getValue(CallToUserDefinedQuestion.java:62)
at
edu.cmu.cs.stage3.alice.core.Property.evaluateIfNecessary(Property.java:380)
at edu.cmu.cs.stage3.alice.core.Property.getValue(Property.java:407)
at
edu.cmu.cs.stage3.alice.core.property.BooleanProperty.getValue(BooleanProperty.java:34)
at
edu.cmu.cs.stage3.alice.core.property.BooleanProperty.getBooleanValue(BooleanProperty.java:46)
at
edu.cmu.cs.stage3.alice.core.property.BooleanProperty.booleanValue(BooleanProperty.java:49)
at
edu.cmu.cs.stage3.alice.core.property.BooleanProperty.booleanValue(BooleanProperty.java:57)
at
edu.cmu.cs.stage3.alice.core.response.IfElseInOrder$RuntimeIfElseInOrder.prologue(IfElseInOrder.java:54)
at
edu.cmu.cs.stage3.alice.core.response.DoInOrder$RuntimeDoInOrder.childPrologueIfNecessary(DoInOrder.java:53)
at
edu.cmu.cs.stage3.alice.core.response.DoInOrder$RuntimeDoInOrder.update(DoInOrder.java:100)
at
edu.cmu.cs.stage3.alice.core.response.CallToUserDefinedResponse$RuntimeCallToUserDefinedResponse.update(CallToUserDefinedResponse.java:89)
at
edu.cmu.cs.stage3.alice.core.response.DoInOrder$RuntimeDoInOrder.childUpdate(DoInOrder.java:58)
at
edu.cmu.cs.stage3.alice.core.response.DoInOrder$RuntimeDoInOrder.update(DoInOrder.java:101)
at
edu.cmu.cs.stage3.alice.core.response.DoTogether$RuntimeDoTogether.update(DoTogether.java:71)
at
edu.cmu.cs.stage3.alice.core.response.DoInOrder$RuntimeDoInOrder.childUpdate(DoInOrder.java:58)
at
edu.cmu.cs.stage3.alice.core.response.DoInOrder$RuntimeDoInOrder.update(DoInOrder.java:101)
at
edu.cmu.cs.stage3.alice.core.response.CallToUserDefinedResponse$RuntimeCallToUserDefinedResponse.update(CallToUserDefinedResponse.java:89)
at
edu.cmu.cs.stage3.alice.core.response.DoTogether$RuntimeDoTogether.update(DoTogether.java:71)
at
edu.cmu.cs.stage3.alice.core.response.DoInOrder$RuntimeDoInOrder.childUpdate(DoInOrder.java:58)
at
edu.cmu.cs.stage3.alice.core.response.DoInOrder$RuntimeDoInOrder.update(DoInOrder.java:101)
at
edu.cmu.cs.stage3.alice.core.response.CallToUserDefinedResponse$RuntimeCallToUserDefinedResponse.update(CallToUserDefinedResponse.java:89)
at
edu.cmu.cs.stage3.alice.core.behavior.TriggerBehavior.internalSchedule(TriggerBehavior.java:70)
at edu.cmu.cs.stage3.alice.core.Behavior.schedule(Behavior.java:233)
at edu.cmu.cs.stage3.alice.core.Sandbox.scheduleBehaviors(Sandbox.java:70)
at edu.cmu.cs.stage3.alice.core.World.scheduleBehaviors(World.java:457)
at edu.cmu.cs.stage3.alice.core.World.schedule(World.java:499)
at
edu.cmu.cs.stage3.alice.core.clock.DefaultClock.schedule(DefaultClock.java:99)
at
edu.cmu.cs.stage3.alice.authoringtool.AuthoringTool$7.run(AuthoringTool.java:693)
at
edu.cmu.cs.stage3.alice.authoringtool.util.DefaultScheduler.simulateOnce(DefaultScheduler.java:115)
at
edu.cmu.cs.stage3.alice.authoringtool.util.DefaultScheduler.run(DefaultScheduler.java:76)
at
edu.cmu.cs.stage3.scheduler.AbstractScheduler.run(AbstractScheduler.java:45)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:602)
at java.awt.EventQueue$1.run(EventQueue.java:600)
at java.security.AccessController.doPrivileged(Native Method)
at
java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:611)
at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
at java.awt.Dialog$1.run(Dialog.java:1046)
at java.awt.Dialog$3.run(Dialog.java:1098)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Dialog.java:1096)
at java.awt.Component.show(Component.java:1584)
at java.awt.Component.setVisible(Component.java:1536)
at java.awt.Window.setVisible(Window.java:842)
at java.awt.Dialog.setVisible(Dialog.java:986)
at
edu.cmu.cs.stage3.swing.DialogManager.showModalDialog(DialogManager.java:61)
at edu.cmu.cs.stage3.swing.DialogManager.showDialog(DialogManager.java:131)
at
edu.cmu.cs.stage3.alice.authoringtool.AuthoringTool.play(AuthoringTool.java:5229)
at
edu.cmu.cs.stage3.alice.authoringtool.Actions$16.actionPerformed(Actions.java:177)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at
javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
at java.awt.Component.processMouseEvent(Component.java:6288)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6053)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4651)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:602)
at java.awt.EventQueue$1.run(EventQueue.java:600)
at java.security.AccessController.doPrivileged(Native Method)
at
java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at
java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:616)
at java.awt.EventQueue$2.run(EventQueue.java:614)
at java.security.AccessController.doPrivileged(Native Method)
at
java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:613)
at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
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