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Bug 370244

Summary: Tons of NPE's thrown in event loop
Product: [Eclipse Project] Platform Reporter: Martin Oberhuber <mober.at+eclipse>
Component: UIAssignee: Platform-UI-Inbox <Platform-UI-Inbox>
Status: CLOSED DUPLICATE QA Contact:
Severity: normal    
Priority: P3 CC: emoffatt, helgepriva, remy.suen
Version: 4.2   
Target Milestone: ---   
Hardware: PC   
OS: Windows 7   
Whiteboard:
Attachments:
Description Flags
Full log none

Description Martin Oberhuber CLA 2012-01-31 11:33:28 EST 
Build ID: Eclipse SDK 4.2m5

Having worked a day on Java / Plugin Development with 4.2m5, I see tons of NPE's in my log (see below). These started appearing when I synchronized my CVS workspace and had some stuff in the compare viewer (editor area), and then pulled up the lower pane's handle to make the information pane larger (and editor area thus smaller).


java.lang.NullPointerException
	at org.eclipse.compare.contentmergeviewer.ContentMergeViewer$ContentMergeViewerLayout.layout(ContentMergeViewer.java:121)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1263)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1249)
	at org.eclipse.swt.widgets.Composite.setLayoutDeferred(Composite.java:1086)
	at org.eclipse.swt.widgets.Display.runDeferredLayouts(Display.java:4189)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3747)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:999)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:893)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:85)
	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:579)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:534)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:352)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:624)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:579)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1433)
Comment 1 Martin Oberhuber CLA 2012-01-31 11:34:17 EST 
Created attachment 210321 [details]
Full log
Comment 2 Martin Oberhuber CLA 2012-01-31 11:35:26 EST 
The NPE's keep appearing when I drag the lower handle, even after a "close all editors" ... although no compare viewer is visible any more.
Comment 3 Remy Suen CLA 2012-01-31 11:59:46 EST 
The workaround is to use 'Window > New Window'.

At the moment, I believe bug 347558 to be the root cause.

*** This bug has been marked as a duplicate of bug 348429 ***
Comment 4 Helge Priva CLA 2013-07-31 07:53:50 EDT 
If you have this problem please vote for this bug please vote for its duplicate here: https://bugs.eclipse.org/bugs/show_bug.cgi?id=348429