Bug 576144

Summary:	NPE is e.JavaElementDeltaBuilder.added(JavaElementDeltaBuilder.java:131)
Product:	[Eclipse Project] JDT	Reporter:	Lars Vogel <Lars.Vogel>
Component:	Core	Assignee:	JDT-Core-Inbox <jdt-core-inbox>
Status:	NEW ---	QA Contact:
Severity:	normal
Priority:	P3	CC:	Lars.Vogel, loskutov
Version:	4.21	Keywords:	needinfo
Target Milestone:	---
Hardware:	PC
OS:	Windows 10
Whiteboard:	stalebug

Description Lars Vogel

2021-09-21 06:33:44 EDT

In the logs of a client I see the following NPE. I don't know how to recreate it.


java.lang.NullPointerException
	at org.eclipse.jdt.internal.core.JavaElementDeltaBuilder.added(JavaElementDeltaBuilder.java:131)
	at org.eclipse.jdt.internal.core.JavaElementDeltaBuilder.findAdditions(JavaElementDeltaBuilder.java:181)
	at org.eclipse.jdt.internal.core.JavaElementDeltaBuilder.findAdditions(JavaElementDeltaBuilder.java:207)
	at org.eclipse.jdt.internal.core.JavaElementDeltaBuilder.findAdditions(JavaElementDeltaBuilder.java:207)
	at org.eclipse.jdt.internal.core.JavaElementDeltaBuilder.findAdditions(JavaElementDeltaBuilder.java:207)
	at org.eclipse.jdt.internal.core.JavaElementDeltaBuilder.buildDeltas(JavaElementDeltaBuilder.java:152)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:174)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:94)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:740)
	at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:806)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1319)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1278)
	at org.eclipse.jdt.internal.corext.util.JavaModelUtil.reconcile(JavaModelUtil.java:645)
	at org.eclipse.jdt.internal.ui.actions.SelectionConverter.getElementAtOffset(SelectionConverter.java:280)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditorBreadcrumb.getCurrentInput(JavaEditorBreadcrumb.java:814)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditorBreadcrumb.setInput(JavaEditorBreadcrumb.java:785)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.setBreadcrumbInput(JavaEditor.java:1999)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.selectionChanged(JavaEditor.java:2260)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor$EditorSelectionChangedListener.selectionChanged(JavaEditor.java:309)
	at org.eclipse.jface.text.TextViewer.firePostSelectionChanged(TextViewer.java:2638)
	at org.eclipse.jface.text.TextViewer.firePostSelectionChanged(TextViewer.java:2585)
	at org.eclipse.jface.text.TextViewer$2.run(TextViewer.java:2564)
	at org.eclipse.swt.widgets.Display.runTimer(Display.java:4152)
	at org.eclipse.swt.widgets.Display.messageProc(Display.java:3256)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(Native Method)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3624)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1041)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
	at org.eclipse.ui.internal.Workbench$$Lambda$139/0x0000000000000000.run(Unknown Source)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1467)

Comment 1 Andrey Loskutov

2021-09-21 06:44:05 EDT

Really 4.22? Is Xtext used? Please attach information about used Eclipse/Java version and if possible, which extra plugins are installed. 
Could be some MT issue.

Comment 2 Lars Vogel

2021-09-21 07:46:25 EDT

Eclipse SDK
Version: 2021-09 (4.21)
Build id: I20210906-0500
OS: Windows 8, v.6.2, x86_64 / win32
Java vendor: International Business Machines Corporation
Java runtime version: 11.0.12+7
Java version: 11.0.12

No xtext. Only EGit is installed in addition to the SDK.

Comment 3 Eclipse Genie

2023-09-12 12:41:26 EDT

This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet.

If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant.

--
The automated Eclipse Genie.