Unexpected exception received while running Sketch It!: java.lang.NullPointerException

Issue #56 new
Former user created an issue

Contents of idea.log below

2020-02-01 11:58:05,496 [ 394668]   INFO - org.pmesmeur.sketchit.SketchIt - Starting generation of PlantUML model for project workspace-intellij-ultimate 
2020-02-01 11:58:05,524 [ 394696]   INFO - t.diagram.UmlDiagramsGenerator - Generating project component diagram 
2020-02-01 11:58:05,524 [ 394696]   INFO - nent.ComponentDiagramGenerator - Starting to generate component diagram: WORKSPACE-INTELLIJ-ULTIMATE's Component Diagram 
2020-02-01 11:58:05,524 [ 394696]   INFO - nent.ComponentDiagramGenerator - Adding module dependencies: com.omscs.cs6310.sad.srini.star-search 
2020-02-01 11:58:05,524 [ 394696]   INFO - nent.ComponentDiagramGenerator - Adding module dependencies: star-search 
2020-02-01 11:58:05,524 [ 394696]   INFO - nent.ComponentDiagramGenerator - Adding module dependencies: star-search.main 
2020-02-01 11:58:05,525 [ 394697]   INFO - nent.ComponentDiagramGenerator - Ending to generate component diagram: WORKSPACE-INTELLIJ-ULTIMATE's Component Diagram 
2020-02-01 11:58:05,601 [ 394773]  ERROR - n.impl.NoSwingUnderWriteAction - AWT events are not allowed inside write action: java.awt.event.InvocationEvent[INVOCATION_DEFAULT,runnable=sun.awt.GlobalCursorManager$NativeUpdater@5b2a039,notifier=null,catchExceptions=false,when=1580579885489] on sun.awt.windows.WToolkit@18b15b4a 
java.lang.Throwable: AWT events are not allowed inside write action: java.awt.event.InvocationEvent[INVOCATION_DEFAULT,runnable=sun.awt.GlobalCursorManager$NativeUpdater@5b2a039,notifier=null,catchExceptions=false,when=1580579885489] on sun.awt.windows.WToolkit@18b15b4a
    at com.intellij.openapi.diagnostic.Logger.error(Logger.java:145)
    at com.intellij.openapi.application.impl.NoSwingUnderWriteAction.lambda$watchForEvents$0(NoSwingUnderWriteAction.java:22)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:444)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:117)
    at java.desktop/java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:190)
    at java.desktop/java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:235)
    at java.desktop/java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:233)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.desktop/java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:233)
    at java.desktop/java.awt.Dialog.show(Dialog.java:1063)
    at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:708)
    at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:433)
    at com.intellij.openapi.ui.DialogWrapper.doShow(DialogWrapper.java:1698)
    at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1657)
    at com.intellij.openapi.ui.messages.MessageDialog.show(MessageDialog.java:177)
    at com.intellij.ui.messages.MessagesServiceImpl.showMessageDialog(MessagesServiceImpl.java:69)
    at com.intellij.openapi.ui.Messages.showDialog(Messages.java:222)
    at com.intellij.openapi.ui.Messages.showDialog(Messages.java:181)
    at com.intellij.openapi.ui.Messages.showErrorDialog(Messages.java:819)
    at org.pmesmeur.sketchit.ui.ExceptionDialog.show(ExceptionDialog.java:13)
    at org.pmesmeur.sketchit.SketchIt.generatePlantUmlDiagramWithExceptionHandling(SketchIt.java:63)
    at org.pmesmeur.sketchit.SketchIt.generatePlantUmlModel(SketchIt.java:53)
    at org.pmesmeur.sketchit.SketchIt.actionBody(SketchIt.java:45)
    at org.pmesmeur.sketchit.SketchIt.access$000(SketchIt.java:12)
    at org.pmesmeur.sketchit.SketchIt$1.run(SketchIt.java:32)
    at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:885)
    at org.pmesmeur.sketchit.SketchIt.runInsideAnIntellijWriteAction(SketchIt.java:30)
    at org.pmesmeur.sketchit.SketchIt.actionPerformed(SketchIt.java:24)
    at com.intellij.openapi.actionSystem.ex.ActionUtil$1.run(ActionUtil.java:298)
    at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:315)
    at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.lambda$actionPerformed$0(ActionMenuItem.java:294)
    at com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:263)
    at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.runOnOwnContext(IdeFocusManagerImpl.java:77)
    at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:284)
    at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
    at com.intellij.openapi.actionSystem.impl.ActionMenuItem.lambda$fireActionPerformed$0(ActionMenuItem.java:112)
    at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:83)
    at com.intellij.openapi.application.TransactionGuardImpl.lambda$submitTransaction$1(TransactionGuardImpl.java:107)
    at com.intellij.openapi.application.TransactionGuardImpl.submitTransaction(TransactionGuardImpl.java:116)
    at com.intellij.openapi.application.TransactionGuard.submitTransaction(TransactionGuard.java:121)
    at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:112)
    at com.intellij.ui.plaf.beg.BegMenuItemUI.doClick(BegMenuItemUI.java:517)
    at com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:36)
    at com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:539)
    at java.desktop/java.awt.Component.processMouseEvent(Component.java:6651)
    at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3342)
    at java.desktop/java.awt.Component.processEvent(Component.java:6416)
    at java.desktop/java.awt.Container.processEvent(Container.java:2263)
    at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5026)
    at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
    at java.desktop/java.awt.Component.dispatchEvent(Component.java:4858)
    at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
    at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
    at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
    at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
    at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2773)
    at java.desktop/java.awt.Component.dispatchEvent(Component.java:4858)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:778)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
    at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:751)
    at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:749)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:748)
    at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:908)
    at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:846)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:778)
    at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:424)
    at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:698)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
2020-02-01 11:58:05,603 [ 394775]  ERROR - n.impl.NoSwingUnderWriteAction - IntelliJ IDEA 2019.3.2  Build #IU-193.6015.39 
2020-02-01 11:58:05,603 [ 394775]  ERROR - n.impl.NoSwingUnderWriteAction - JDK: 11.0.5; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o 
2020-02-01 11:58:05,603 [ 394775]  ERROR - n.impl.NoSwingUnderWriteAction - OS: Windows 10 
2020-02-01 11:58:05,604 [ 394776]  ERROR - n.impl.NoSwingUnderWriteAction - Plugin to blame: Sketch It! version: 0.07.00 
2020-02-01 11:58:05,605 [ 394777]  ERROR - n.impl.NoSwingUnderWriteAction - Last Action: Myplugin.Textboxes 
2020-02-01 11:58:08,740 [ 397912]   INFO - org.pmesmeur.sketchit.SketchIt - Ending generation of PlantUML model for project workspace-intellij-ultimate 
2020-02-01 11:58:10,154 [ 399326]   INFO - rationStore.ComponentStoreImpl - Saving Project (name=workspace-intellij-ultimate, containerState=ACTIVE, componentStore=C:\Users\sri\Documents\ExtHardDisk\Personal\MS\gatech\2020Spring\CS6310-SoftwareArchAndDesign\workspace-intellij-ultimate) RunManager took 12 ms 

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