[jbosstools-issues] [JBoss JIRA] (JBIDE-18572) NPE while calling a diff between 2 versions of a JS file

[Alexey Kazakov (JIRA)]

    [ https://issues.jboss.org/browse/JBIDE-18572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13024921#comment-13024921 ] 

Alexey Kazakov commented on JBIDE-18572:
----------------------------------------

[~kmarmaliykov] this issue looks critical, any updates on it? I'm moving it to 4.2.2 but feel free to move it back to 4.2.1.CR1 if you think you can fix it this week.

> NPE while calling a diff between 2 versions of a JS file
> --------------------------------------------------------
>
>                 Key: JBIDE-18572
>                 URL: https://issues.jboss.org/browse/JBIDE-18572
>             Project: Tools (JBoss Tools)
>          Issue Type: Bug
>          Components: visual-page-editor-core
>    Affects Versions: 4.2.0.CR1
>            Reporter: Xavier Coulon
>            Assignee: Konstantin Marmalyukov
>            Priority: Critical
>             Fix For: 4.2.2.Final, 4.3.0.Alpha1
>
>
> Not sure if the error is related {{summarry}}, but here's the stacktrace:
> I did compare my current JS file with the first version in my history, which was an empty file, then I called the diff with the next version and I got this error. I kept having this error when comparing the current version with any other version of the file (if that can help to reproduce/identify the problem)
> {code}
> java.lang.NullPointerException
> 	at org.jboss.tools.vpe.preview.editor.VpvEditor.formRequestToServer(VpvEditor.java:572)
> 	at org.jboss.tools.vpe.preview.editor.VpvEditor.access$0(VpvEditor.java:551)
> 	at org.jboss.tools.vpe.preview.editor.VpvEditor$EditorListener.partInputChanged(VpvEditor.java:674)
> 	at org.eclipse.ui.internal.WorkbenchPage$28.run(WorkbenchPage.java:5151)
> 	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
> 	at org.eclipse.ui.internal.WorkbenchPage.firePartInputChanged(WorkbenchPage.java:5148)
> 	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart$4.propertyChanged(CompatibilityPart.java:369)
> 	at org.eclipse.ui.part.WorkbenchPart.firePropertyChange(WorkbenchPart.java:132)
> 	at org.eclipse.compare.internal.CompareEditor.doSetInput(CompareEditor.java:313)
> 	at org.eclipse.compare.internal.CompareEditor.setInput(CompareEditor.java:254)
> 	at org.eclipse.compare.internal.CompareUIPlugin$1.run(CompareUIPlugin.java:546)
> 	at org.eclipse.compare.internal.CompareUIPlugin.syncExec(CompareUIPlugin.java:1413)
> 	at org.eclipse.compare.internal.CompareUIPlugin.internalOpenEditor(CompareUIPlugin.java:567)
> 	at org.eclipse.compare.internal.CompareUIPlugin.openEditorInBackground(CompareUIPlugin.java:537)
> 	at org.eclipse.compare.internal.CompareUIPlugin.openCompareEditor(CompareUIPlugin.java:526)
> 	at org.eclipse.compare.CompareUI.reuseCompareEditor(CompareUI.java:199)
> 	at org.eclipse.compare.CompareUI.reuseCompareEditor(CompareUI.java:180)
> 	at org.eclipse.team.internal.ui.actions.CompareRevisionAction.openInCompare(CompareRevisionAction.java:139)
> 	at org.eclipse.team.internal.ui.actions.CompareRevisionAction.run(CompareRevisionAction.java:102)
> 	at org.eclipse.team.internal.ui.history.LocalHistoryPage$9.open(LocalHistoryPage.java:414)
> 	at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48)
> 	at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:853)
> 	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
> 	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
> 	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:178)
> 	at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:850)
> 	at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1142)
> 	at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1249)
> 	at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:278)
> 	at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:272)
> 	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:313)
> 	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
> 	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4188)
> 	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1467)
> 	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1490)
> 	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1475)
> 	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279)
> 	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4031)
> 	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3658)
> 	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
> 	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
> 	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
> 	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
> 	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
> 	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
> 	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
> 	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
> 	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
> 	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
> 	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
> 	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
> 	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
> 	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:484)
> 	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
> 	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
> 	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
> {code}



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