135292 – [compiler] NPE in ProblemReporter.invalidField plus .log swamping

Bug 135292 - [compiler] NPE in ProblemReporter.invalidField plus .log swamping

Summary: [compiler] NPE in ProblemReporter.invalidField plus .log swamping

Status:	VERIFIED FIXED

Alias:	None

Product:	JDT
Classification:	Eclipse Project
Component:	Core (show other bugs)
Version:	3.2
Hardware:	PC Windows XP

Importance:	P3 major (vote)
Target Milestone:	3.2 RC1
Assignee:	Philipe Mulet
QA Contact:

URL:
Whiteboard:
Keywords:

Duplicates (1):	127251 (view as bug list)
Depends on:
Blocks:

Reported:	2006-04-06 11:08 EDT by Dani Megert
Modified:	2006-04-13 15:51 EDT (History)
CC List:	0 users

See Also:

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Description Dani Megert

2006-04-06 11:08:32 EDT

N20060405-0010 + plug-in export from HEAD including JDT Core code

Sorry no steps. The .log gets huge since the file is dumped each time. Could the logic be optimized to dump the same file just once?

!SESSION 2006-04-06 16:14:00.628 -----------------------------------------------
eclipse.buildId=N20060405-0010
java.fullversion=J2RE 1.5.0 IBM J9 2.3 Windows XP x86-32 j9vmwi3223-20060222a (JIT enabled)
J9VM - 20060220_05389_lHdSMR
JIT  - 20060220_2133_r8
GC   - 20060214_AA
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=de_CH
Framework arguments:  -update -keyring c:\eclipse\.keyring -application org.eclipse.ui.ide.workbench -showlocation
Command-line arguments:  -update -keyring c:\eclipse\.keyring -application org.eclipse.ui.ide.workbench -showlocation -data c:\eclipse\workspaces\Development_3_2\plugins

!ENTRY org.eclipse.jdt.core 4 4 2006-04-06 16:15:04.539
!MESSAGE Exception occurred during problem detection:
----------------------------------- SOURCE BEGIN -------------------------------------
/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
 package org.eclipse.jdt.internal.corext.util;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.StringTokenizer;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.IJobChangeEvent;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.core.runtime.jobs.JobChangeAdapter;

import org.eclipse.core.resources.ResourcesPlugin;

import org.eclipse.jdt.core.ElementChangedEvent;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IElementChangedListener;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaElementDelta;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchEngine;

import org.eclipse.jdt.internal.corext.CorextMessages;

import org.eclipse.jdt.internal.ui.JavaPlugin;

import org.w3c.dom.Element;

/**
 * History for the open type dialog. Object and keys are both {@link TypeInfo}s.
 */
public class 56 extends History {
	
	private static class TypeHistoryDeltaListener implements IElementChangedListener {
		public void elementChanged(ElementChangedEvent event) {
			if (processDelta(event.getDelta())) {
				OpenTypeHistory.getInstance().markAsInconsistent();
			}
		}
		
		/**
		 * Computes whether the history needs a consistency check or not.
		 * 
		 * @param delta the Java element delta
		 * 
		 * @return <code>true</code> if consistency must be checked 
		 *  <code>false</code> otherwise.
		 */
		private boolean processDelta(IJavaElementDelta delta) {
			IJavaElement elem= delta.getElement();
			
			boolean isChanged= delta.getKind() == IJavaElementDelta.CHANGED;
			boolean isRemoved= delta.getKind() == IJavaElementDelta.REMOVED;
						
			switch (elem.getElementType()) {
				case IJavaElement.JAVA_PROJECT:
					if (isRemoved || (isChanged && 
							(delta.getFlags() & IJavaElementDelta.F_CLOSED) != 0)) {
						return true;
					}
					return processChildrenDelta(delta);
				case IJavaElement.PACKAGE_FRAGMENT_ROOT:
					if (isRemoved || (isChanged && (
							(delta.getFlags() & IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0 ||
							(delta.getFlags() & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0))) {
						return true;
					}
					return processChildrenDelta(delta);
				case IJavaElement.TYPE:
					if (isChanged && (delta.getFlags() & IJavaElementDelta.F_MODIFIERS) != 0) {
						return true;
					}
					// type children can be inner classes: fall through
				case IJavaElement.JAVA_MODEL:
				case IJavaElement.PACKAGE_FRAGMENT:
				case IJavaElement.CLASS_FILE:
					if (isRemoved) {
						return true;
					}				
					return processChildrenDelta(delta);
				case IJavaElement.COMPILATION_UNIT:
					// Not the primary compilation unit. Ignore it 
					if (!JavaModelUtil.isPrimary((ICompilationUnit) elem)) {
						return false;
					}

					if (isRemoved || (isChanged && isUnknownStructuralChange(delta.getFlags()))) {
						return true;
					}
					return processChildrenDelta(delta);
				default:
					// fields, methods, imports ect
					return false;
			}	
		}
		
		private boolean isUnknownStructuralChange(int flags) {
			if ((flags & IJavaElementDelta.F_CONTENT) == 0)
				return false;
			return (flags & IJavaElementDelta.F_FINE_GRAINED) == 0; 
		}

		/*
		private boolean isPossibleStructuralChange(int flags) {
			return (flags & (IJavaElementDelta.F_CONTENT | IJavaElementDelta.F_FINE_GRAINED)) == IJavaElementDelta.F_CONTENT;
		}
		*/		
		
		private boolean processChildrenDelta(IJavaElementDelta delta) {
			IJavaElementDelta[] children= delta.getAffectedChildren();
			for (int i= 0; i < children.length; i++) {
				if (processDelta(children[i])) {
					return true;
				}
			}
			return false;
		}
	}
	
	private static class UpdateJob extends Job {
		public static final String FAMILY= UpdateJob.class.getName();
		public UpdateJob() {
			super(CorextMessages.TypeInfoHistory_consistency_check);
		}
		protected IStatus run(IProgressMonitor monitor) {
			OpenTypeHistory history= OpenTypeHistory.getInstance();
			history.internalCheckConsistency(monitor);
			return new Status(IStatus.OK, JavaPlugin.getPluginId(), IStatus.OK, "", null); //$NON-NLS-1$
		}
		public boolean belongsTo(Object family) {
			return FAMILY.equals(family);
		}
	}
	
	private static class UpdateJobListener extends JobChangeAdapter {
		public void done(IJobChangeEvent event) {
			OpenTypeHistory history= OpenTypeHistory.getInstance();
			event.getJob().removeJobChangeListener(this);
			history.clearUpdateJob(event.getJob());
		}
	}
	
	private boolean fNeedsConsistencyCheck;
	private final IElementChangedListener fDeltaListener;
	private UpdateJob fUpdateJob;
	private final TypeInfoFactory fTypeInfoFactory;
	private final UpdateJobListener fListener= new UpdateJobListener();
	
	private static final String FILENAME= "OpenTypeHistory.xml"; //$NON-NLS-1$
	private static final String NODE_ROOT= "typeInfoHistroy"; //$NON-NLS-1$
	private static final String NODE_TYPE_INFO= "typeInfo"; //$NON-NLS-1$
	private static final String NODE_NAME= "name"; //$NON-NLS-1$
	private static final String NODE_PACKAGE= "package"; //$NON-NLS-1$
	private static final String NODE_ENCLOSING_NAMES= "enclosingTypes"; //$NON-NLS-1$
	private static final String NODE_PATH= "path"; //$NON-NLS-1$
	private static final String NODE_MODIFIERS= "modifiers";  //$NON-NLS-1$
	private static final char[][] EMPTY_ENCLOSING_NAMES= new char[0][0];
	
	private static OpenTypeHistory fgInstance;
	
	public static synchronized OpenTypeHistory getInstance() {
		if (fgInstance == null)
			fgInstance= new OpenTypeHistory();
		return fgInstance;
	}
	
	public static void shutdown() {
		if (fgInstance == null)
			return;
		fgInstance.doShutdown();
	}
	
	private OpenTypeHistory() {
		super(FILENAME, NODE_ROOT, NODE_TYPE_INFO);
		fTypeInfoFactory= new TypeInfoFactory();
		load();
		fNeedsConsistencyCheck= true;
		fDeltaListener= new TypeHistoryDeltaListener();
		JavaCore.addElementChangedListener(fDeltaListener);
	}
	
	public synchronized void markAsInconsistent() {
		fNeedsConsistencyCheck= true;
		if (fUpdateJob != null) {
			fUpdateJob.cancel();
		}
		fUpdateJob= new UpdateJob();
		fUpdateJob.setPriority(Job.SHORT);
		// The update job might initialize parts of the Java model.
		// (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=128399)
		// So we have to set a correct rule to avoid deadlocks.
		fUpdateJob.setRule(JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()).getSchedulingRule());
		fUpdateJob.addJobChangeListener(fListener);
		// No need to sync with the old update job since we use
		// scheduling rules. The new job will run only if the old
		// one is finished since they have the same scheduling rule.
		fUpdateJob.schedule();
	}
	
	public synchronized boolean needConsistencyCheck() {
		return fNeedsConsistencyCheck;
	}

	public void checkConsistency(IProgressMonitor monitor) throws OperationCanceledException {
		synchronized (this) {
			if (!fNeedsConsistencyCheck)
				return;
		}
		// When joining the update job make sure that we don't hold looks
		// Otherwise the update Job can't continue normally. As a result
		// the update job could have already finished before we join it.
		// However this isn't a problem since the join will then be a NOP.
		if (hasUpdateJob()) {
			try {
				Platform.getJobManager().join(UpdateJob.FAMILY, monitor);
			} catch (OperationCanceledException e) {
				// Ignore and do the consistency check without
				// waiting for the update job.
			} catch (InterruptedException e) {
				// Ignore and do the consistency check without
				// waiting for the update job.
			}
		}
		// Since we gave up the lock when joining the update job
		// we have to re check the fNeedsConsistencyCheck flag
		synchronized(this) {
			if (!fNeedsConsistencyCheck)
				return;
			internalCheckConsistency(monitor);
		}
	}
	
	public synchronized boolean contains(TypeInfo type) {
		return super.contains(type);
	}

	public synchronized void accessed(TypeInfo info) {
		super.accessed(info);
	}

	public synchronized TypeInfo remove(TypeInfo info) {
		return (TypeInfo)super.remove(info);
	}

	public synchronized TypeInfo[] getTypeInfos() {
		Collection values= getValues();
		int size= values.size();
		TypeInfo[] result= new TypeInfo[size];
		int i= size - 1;
		for (Iterator iter= values.iterator(); iter.hasNext();) {
			result[i]= (TypeInfo)iter.next();
			i--;
		}
		return result;
	}

	public synchronized TypeInfo[] getFilteredTypeInfos(TypeInfoFilter filter) {
		Collection values= getValues();
		List result= new ArrayList();
		for (Iterator iter= values.iterator(); iter.hasNext();) {
			TypeInfo type= (TypeInfo)iter.next();
			if ((filter == null || filter.matchesHistoryElement(type)) && !TypeFilter.isFiltered(type.getFullyQualifiedName()))
				result.add(type);
		}
		Collections.reverse(result);
		return (TypeInfo[])result.toArray(new TypeInfo[result.size()]);
		
	}
	
	protected Object getKey(Object object) {
		return object;
	}

	private synchronized void internalCheckConsistency(IProgressMonitor monitor) throws OperationCanceledException {
		IJavaSearchScope scope= SearchEngine.createWorkspaceScope();
		List keys= new ArrayList(getKeys());
		monitor.beginTask(CorextMessages.TypeInfoHistory_consistency_check, keys.size());
		monitor.setTaskName(CorextMessages.TypeInfoHistory_consistency_check);
		for (Iterator iter= keys.iterator(); iter.hasNext();) {
			TypeInfo type= (TypeInfo)iter.next();
			try {
				IType jType= type.resolveType(scope);
				if (jType == null || !jType.exists()) {
					remove(type);
				} else {
					// copy over the modifiers since they may have changed
					type.setModifiers(jType.getFlags());
				}
			} catch (JavaModelException e) {
				remove(type);
			}
			if (monitor.isCanceled())
				throw new OperationCanceledException();
			monitor.worked(1);
		}
		monitor.done();
		fNeedsConsistencyCheck= false;
	}
	
	private synchronized void clearUpdateJob(Job toClear) {
		if (fUpdateJob == toClear)
			fUpdateJob= null;
	}
	
	private synchronized boolean hasUpdateJob() {
		return fUpdateJob != null;
	}
	
	private void doShutdown() {
		JavaCore.removeElementChangedListener(fDeltaListener);
	}
	
	protected Object createFromElement(Element type) {
		String name= type.getAttribute(NODE_NAME);
		String pack= type.getAttribute(NODE_PACKAGE);
		char[][] enclosingNames= getEnclosingNames(type);
		String path= type.getAttribute(NODE_PATH);
		int modifiers= 0;
		try {
			modifiers= Integer.parseInt(type.getAttribute(NODE_MODIFIERS));
		} catch (NumberFormatException e) {
			// take zero
		}
		TypeInfo info= fTypeInfoFactory.create(
			pack.toCharArray(), name.toCharArray(), enclosingNames, modifiers, path);
		return info;
	}

	protected void setAttributes(Object object, Element typeElement) {
		TypeInfo type= (TypeInfo)object;
		typeElement.setAttribute(NODE_NAME, type.getTypeName());
		typeElement.setAttribute(NODE_PACKAGE, type.getPackageName());
		typeElement.setAttribute(NODE_ENCLOSING_NAMES, type.getEnclosingName());
		typeElement.setAttribute(NODE_PATH, type.getPath());
		typeElement.setAttribute(NODE_MODIFIERS, Integer.toString(type.getModifiers()));
	}

	private char[][] getEnclosingNames(Element type) {
		String enclosingNames= type.getAttribute(NODE_ENCLOSING_NAMES);
		if (enclosingNames.length() == 0)
			return EMPTY_ENCLOSING_NAMES;
		StringTokenizer tokenizer= new StringTokenizer(enclosingNames, "."); //$NON-NLS-1$
		List names= new ArrayList();
		while(tokenizer.hasMoreTokens()) {
			String name= tokenizer.nextToken();
			names.add(name.toCharArray());
		}
		return (char[][])names.toArray(new char[names.size()][]);
	}
}

----------------------------------- SOURCE END -------------------------------------
!STACK 0
java.lang.NullPointerException
	at org.eclipse.jdt.internal.compiler.problem.ProblemReporter.invalidField(ProblemReporter.java:2878)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.reportError(QualifiedNameReference.java:958)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.resolveType(QualifiedNameReference.java:1026)
	at org.eclipse.jdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:344)
	at org.eclipse.jdt.internal.compiler.ast.Expression.resolve(Expression.java:884)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolveUsing(Block.java:115)
	at org.eclipse.jdt.internal.compiler.ast.TryStatement.resolve(TryStatement.java:687)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolve(Block.java:101)
	at org.eclipse.jdt.internal.compiler.ast.IfStatement.resolve(IfStatement.java:234)
	at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:432)
	at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:179)
	at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:403)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1054)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1101)
	at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:353)
	at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:687)
	at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:726)
	at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:174)
	at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:246)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:152)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:71)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:720)
	at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:779)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1120)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1092)
	at org.eclipse.jdt.internal.corext.util.JavaModelUtil.reconcile(JavaModelUtil.java:701)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.getElementAt(CompilationUnitEditor.java:1300)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$RememberedOffset.setOffset(CompilationUnitEditor.java:881)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$RememberedSelection.remember(CompilationUnitEditor.java:771)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.rememberSelection(CompilationUnitEditor.java:1832)
	at org.eclipse.ui.texteditor.AbstractTextEditor$4.run(AbstractTextEditor.java:337)
	at org.eclipse.ui.texteditor.AbstractTextEditor$ElementStateListener.execute(AbstractTextEditor.java:486)
	at org.eclipse.ui.texteditor.AbstractTextEditor$ElementStateListener.elementContentAboutToBeReplaced(AbstractTextEditor.java:341)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$FileBufferListener.bufferContentAboutToBeReplaced(TextFileDocumentProvider.java:252)
	at org.eclipse.core.internal.filebuffers.TextFileBufferManager$4.run(TextFileBufferManager.java:454)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.core.internal.filebuffers.TextFileBufferManager.fireBufferContentAboutToBeReplaced(TextFileBufferManager.java:452)
	at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.handleFileContentChanged(ResourceTextFileBuffer.java:473)
	at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.revert(ResourceFileBuffer.java:351)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$1.execute(TextFileDocumentProvider.java:709)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$DocumentProviderOperation.run(TextFileDocumentProvider.java:143)
	at org.eclipse.ui.actions.WorkspaceModifyDelegatingOperation.execute(WorkspaceModifyDelegatingOperation.java:68)
	at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:101)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1737)
	at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:113)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:73)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:63)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation(TextFileDocumentProvider.java:459)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.resetDocument(TextFileDocumentProvider.java:727)
	at org.eclipse.ui.texteditor.AbstractTextEditor.performRevert(AbstractTextEditor.java:3932)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.performRevert(JavaEditor.java:3573)
	at org.eclipse.ui.texteditor.AbstractTextEditor.doRevertToSaved(AbstractTextEditor.java:3912)
	at org.eclipse.ui.texteditor.StatusTextEditor.doRevertToSaved(StatusTextEditor.java:183)
	at org.eclipse.ui.texteditor.RevertToSavedAction.run(RevertToSavedAction.java:47)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:499)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:539)
	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488)
	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:400)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:925)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3346)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
	at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
	at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:169)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:615)
	at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
	at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
	at org.eclipse.core.launcher.Main.run(Main.java:977)
	at org.eclipse.core.launcher.Main.main(Main.java:952)

!ENTRY org.eclipse.jdt.core 4 1005 2006-04-06 16:15:04.549
!MESSAGE java.lang.NullPointerException
!STACK 0
java.lang.NullPointerException
	at org.eclipse.jdt.internal.compiler.problem.ProblemReporter.invalidField(ProblemReporter.java:2878)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.reportError(QualifiedNameReference.java:958)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.resolveType(QualifiedNameReference.java:1026)
	at org.eclipse.jdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:344)
	at org.eclipse.jdt.internal.compiler.ast.Expression.resolve(Expression.java:884)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolveUsing(Block.java:115)
	at org.eclipse.jdt.internal.compiler.ast.TryStatement.resolve(TryStatement.java:687)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolve(Block.java:101)
	at org.eclipse.jdt.internal.compiler.ast.IfStatement.resolve(IfStatement.java:234)
	at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:432)
	at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:179)
	at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:403)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1054)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1101)
	at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:353)
	at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:687)
	at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:726)
	at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:174)
	at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:246)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:152)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:71)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:720)
	at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:779)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1120)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1092)
	at org.eclipse.jdt.internal.corext.util.JavaModelUtil.reconcile(JavaModelUtil.java:701)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.getElementAt(CompilationUnitEditor.java:1300)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$RememberedOffset.setOffset(CompilationUnitEditor.java:881)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$RememberedSelection.remember(CompilationUnitEditor.java:771)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.rememberSelection(CompilationUnitEditor.java:1832)
	at org.eclipse.ui.texteditor.AbstractTextEditor$4.run(AbstractTextEditor.java:337)
	at org.eclipse.ui.texteditor.AbstractTextEditor$ElementStateListener.execute(AbstractTextEditor.java:486)
	at org.eclipse.ui.texteditor.AbstractTextEditor$ElementStateListener.elementContentAboutToBeReplaced(AbstractTextEditor.java:341)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$FileBufferListener.bufferContentAboutToBeReplaced(TextFileDocumentProvider.java:252)
	at org.eclipse.core.internal.filebuffers.TextFileBufferManager$4.run(TextFileBufferManager.java:454)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.core.internal.filebuffers.TextFileBufferManager.fireBufferContentAboutToBeReplaced(TextFileBufferManager.java:452)
	at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.handleFileContentChanged(ResourceTextFileBuffer.java:473)
	at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.revert(ResourceFileBuffer.java:351)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$1.execute(TextFileDocumentProvider.java:709)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$DocumentProviderOperation.run(TextFileDocumentProvider.java:143)
	at org.eclipse.ui.actions.WorkspaceModifyDelegatingOperation.execute(WorkspaceModifyDelegatingOperation.java:68)
	at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:101)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1737)
	at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:113)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:73)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:63)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation(TextFileDocumentProvider.java:459)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.resetDocument(TextFileDocumentProvider.java:727)
	at org.eclipse.ui.texteditor.AbstractTextEditor.performRevert(AbstractTextEditor.java:3932)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.performRevert(JavaEditor.java:3573)
	at org.eclipse.ui.texteditor.AbstractTextEditor.doRevertToSaved(AbstractTextEditor.java:3912)
	at org.eclipse.ui.texteditor.StatusTextEditor.doRevertToSaved(StatusTextEditor.java:183)
	at org.eclipse.ui.texteditor.RevertToSavedAction.run(RevertToSavedAction.java:47)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:499)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:539)
	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488)
	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:400)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:925)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3346)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
	at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
	at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:169)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:615)
	at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
	at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
	at org.eclipse.core.launcher.Main.run(Main.java:977)
	at org.eclipse.core.launcher.Main.main(Main.java:952)

!ENTRY org.eclipse.jdt.core 4 4 2006-04-06 16:15:04.730
!MESSAGE Exception occurred during problem detection:
----------------------------------- SOURCE BEGIN -------------------------------------
/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
 package org.eclipse.jdt.internal.corext.util;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.StringTokenizer;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.IJobChangeEvent;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.core.runtime.jobs.JobChangeAdapter;

import org.eclipse.core.resources.ResourcesPlugin;

import org.eclipse.jdt.core.ElementChangedEvent;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IElementChangedListener;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaElementDelta;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchEngine;

import org.eclipse.jdt.internal.corext.CorextMessages;

import org.eclipse.jdt.internal.ui.JavaPlugin;

import org.w3c.dom.Element;

/**
 * History for the open type dialog. Object and keys are both {@link TypeInfo}s.
 */
public class 56 extends History {
	
	private static class TypeHistoryDeltaListener implements IElementChangedListener {
		public void elementChanged(ElementChangedEvent event) {
			if (processDelta(event.getDelta())) {
				OpenTypeHistory.getInstance().markAsInconsistent();
			}
		}
		
		/**
		 * Computes whether the history needs a consistency check or not.
		 * 
		 * @param delta the Java element delta
		 * 
		 * @return <code>true</code> if consistency must be checked 
		 *  <code>false</code> otherwise.
		 */
		private boolean processDelta(IJavaElementDelta delta) {
			IJavaElement elem= delta.getElement();
			
			boolean isChanged= delta.getKind() == IJavaElementDelta.CHANGED;
			boolean isRemoved= delta.getKind() == IJavaElementDelta.REMOVED;
						
			switch (elem.getElementType()) {
				case IJavaElement.JAVA_PROJECT:
					if (isRemoved || (isChanged && 
							(delta.getFlags() & IJavaElementDelta.F_CLOSED) != 0)) {
						return true;
					}
					return processChildrenDelta(delta);
				case IJavaElement.PACKAGE_FRAGMENT_ROOT:
					if (isRemoved || (isChanged && (
							(delta.getFlags() & IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0 ||
							(delta.getFlags() & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0))) {
						return true;
					}
					return processChildrenDelta(delta);
				case IJavaElement.TYPE:
					if (isChanged && (delta.getFlags() & IJavaElementDelta.F_MODIFIERS) != 0) {
						return true;
					}
					// type children can be inner classes: fall through
				case IJavaElement.JAVA_MODEL:
				case IJavaElement.PACKAGE_FRAGMENT:
				case IJavaElement.CLASS_FILE:
					if (isRemoved) {
						return true;
					}				
					return processChildrenDelta(delta);
				case IJavaElement.COMPILATION_UNIT:
					// Not the primary compilation unit. Ignore it 
					if (!JavaModelUtil.isPrimary((ICompilationUnit) elem)) {
						return false;
					}

					if (isRemoved || (isChanged && isUnknownStructuralChange(delta.getFlags()))) {
						return true;
					}
					return processChildrenDelta(delta);
				default:
					// fields, methods, imports ect
					return false;
			}	
		}
		
		private boolean isUnknownStructuralChange(int flags) {
			if ((flags & IJavaElementDelta.F_CONTENT) == 0)
				return false;
			return (flags & IJavaElementDelta.F_FINE_GRAINED) == 0; 
		}

		/*
		private boolean isPossibleStructuralChange(int flags) {
			return (flags & (IJavaElementDelta.F_CONTENT | IJavaElementDelta.F_FINE_GRAINED)) == IJavaElementDelta.F_CONTENT;
		}
		*/		
		
		private boolean processChildrenDelta(IJavaElementDelta delta) {
			IJavaElementDelta[] children= delta.getAffectedChildren();
			for (int i= 0; i < children.length; i++) {
				if (processDelta(children[i])) {
					return true;
				}
			}
			return false;
		}
	}
	
	private static class UpdateJob extends Job {
		public static final String FAMILY= UpdateJob.class.getName();
		public UpdateJob() {
			super(CorextMessages.TypeInfoHistory_consistency_check);
		}
		protected IStatus run(IProgressMonitor monitor) {
			OpenTypeHistory history= OpenTypeHistory.getInstance();
			history.internalCheckConsistency(monitor);
			return new Status(IStatus.OK, JavaPlugin.getPluginId(), IStatus.OK, "", null); //$NON-NLS-1$
		}
		public boolean belongsTo(Object family) {
			return FAMILY.equals(family);
		}
	}
	
	private static class UpdateJobListener extends JobChangeAdapter {
		public void done(IJobChangeEvent event) {
			OpenTypeHistory history= OpenTypeHistory.getInstance();
			event.getJob().removeJobChangeListener(this);
			history.clearUpdateJob(event.getJob());
		}
	}
	
	private boolean fNeedsConsistencyCheck;
	private final IElementChangedListener fDeltaListener;
	private UpdateJob fUpdateJob;
	private final TypeInfoFactory fTypeInfoFactory;
	private final UpdateJobListener fListener= new UpdateJobListener();
	
	private static final String FILENAME= "OpenTypeHistory.xml"; //$NON-NLS-1$
	private static final String NODE_ROOT= "typeInfoHistroy"; //$NON-NLS-1$
	private static final String NODE_TYPE_INFO= "typeInfo"; //$NON-NLS-1$
	private static final String NODE_NAME= "name"; //$NON-NLS-1$
	private static final String NODE_PACKAGE= "package"; //$NON-NLS-1$
	private static final String NODE_ENCLOSING_NAMES= "enclosingTypes"; //$NON-NLS-1$
	private static final String NODE_PATH= "path"; //$NON-NLS-1$
	private static final String NODE_MODIFIERS= "modifiers";  //$NON-NLS-1$
	private static final char[][] EMPTY_ENCLOSING_NAMES= new char[0][0];
	
	private static OpenTypeHistory fgInstance;
	
	public static synchronized OpenTypeHistory getInstance() {
		if (fgInstance == null)
			fgInstance= new OpenTypeHistory();
		return fgInstance;
	}
	
	public static void shutdown() {
		if (fgInstance == null)
			return;
		fgInstance.doShutdown();
	}
	
	private OpenTypeHistory() {
		super(FILENAME, NODE_ROOT, NODE_TYPE_INFO);
		fTypeInfoFactory= new TypeInfoFactory();
		load();
		fNeedsConsistencyCheck= true;
		fDeltaListener= new TypeHistoryDeltaListener();
		JavaCore.addElementChangedListener(fDeltaListener);
	}
	
	public synchronized void markAsInconsistent() {
		fNeedsConsistencyCheck= true;
		if (fUpdateJob != null) {
			fUpdateJob.cancel();
		}
		fUpdateJob= new UpdateJob();
		fUpdateJob.setPriority(Job.SHORT);
		// The update job might initialize parts of the Java model.
		// (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=128399)
		// So we have to set a correct rule to avoid deadlocks.
		fUpdateJob.setRule(JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()).getSchedulingRule());
		fUpdateJob.addJobChangeListener(fListener);
		// No need to sync with the old update job since we use
		// scheduling rules. The new job will run only if the old
		// one is finished since they have the same scheduling rule.
		fUpdateJob.schedule();
	}
	
	public synchronized boolean needConsistencyCheck() {
		return fNeedsConsistencyCheck;
	}

	public void checkConsistency(IProgressMonitor monitor) throws OperationCanceledException {
		synchronized (this) {
			if (!fNeedsConsistencyCheck)
				return;
		}
		// When joining the update job make sure that we don't hold looks
		// Otherwise the update Job can't continue normally. As a result
		// the update job could have already finished before we join it.
		// However this isn't a problem since the join will then be a NOP.
		if (hasUpdateJob()) {
			try {
				Platform.getJobManager().join(UpdateJob.FAMILY, monitor);
			} catch (OperationCanceledException e) {
				// Ignore and do the consistency check without
				// waiting for the update job.
			} catch (InterruptedException e) {
				// Ignore and do the consistency check without
				// waiting for the update job.
			}
		}
		// Since we gave up the lock when joining the update job
		// we have to re check the fNeedsConsistencyCheck flag
		synchronized(this) {
			if (!fNeedsConsistencyCheck)
				return;
			internalCheckConsistency(monitor);
		}
	}
	
	public synchronized boolean contains(TypeInfo type) {
		return super.contains(type);
	}

	public synchronized void accessed(TypeInfo info) {
		super.accessed(info);
	}

	public synchronized TypeInfo remove(TypeInfo info) {
		return (TypeInfo)super.remove(info);
	}

	public synchronized TypeInfo[] getTypeInfos() {
		Collection values= getValues();
		int size= values.size();
		TypeInfo[] result= new TypeInfo[size];
		int i= size - 1;
		for (Iterator iter= values.iterator(); iter.hasNext();) {
			result[i]= (TypeInfo)iter.next();
			i--;
		}
		return result;
	}

	public synchronized TypeInfo[] getFilteredTypeInfos(TypeInfoFilter filter) {
		Collection values= getValues();
		List result= new ArrayList();
		for (Iterator iter= values.iterator(); iter.hasNext();) {
			TypeInfo type= (TypeInfo)iter.next();
			if ((filter == null || filter.matchesHistoryElement(type)) && !TypeFilter.isFiltered(type.getFullyQualifiedName()))
				result.add(type);
		}
		Collections.reverse(result);
		return (TypeInfo[])result.toArray(new TypeInfo[result.size()]);
		
	}
	
	protected Object getKey(Object object) {
		return object;
	}

	private synchronized void internalCheckConsistency(IProgressMonitor monitor) throws OperationCanceledException {
		IJavaSearchScope scope= SearchEngine.createWorkspaceScope();
		List keys= new ArrayList(getKeys());
		monitor.beginTask(CorextMessages.TypeInfoHistory_consistency_check, keys.size());
		monitor.setTaskName(CorextMessages.TypeInfoHistory_consistency_check);
		for (Iterator iter= keys.iterator(); iter.hasNext();) {
			TypeInfo type= (TypeInfo)iter.next();
			try {
				IType jType= type.resolveType(scope);
				if (jType == null || !jType.exists()) {
					remove(type);
				} else {
					// copy over the modifiers since they may have changed
					type.setModifiers(jType.getFlags());
				}
			} catch (JavaModelException e) {
				remove(type);
			}
			if (monitor.isCanceled())
				throw new OperationCanceledException();
			monitor.worked(1);
		}
		monitor.done();
		fNeedsConsistencyCheck= false;
	}
	
	private synchronized void clearUpdateJob(Job toClear) {
		if (fUpdateJob == toClear)
			fUpdateJob= null;
	}
	
	private synchronized boolean hasUpdateJob() {
		return fUpdateJob != null;
	}
	
	private void doShutdown() {
		JavaCore.removeElementChangedListener(fDeltaListener);
	}
	
	protected Object createFromElement(Element type) {
		String name= type.getAttribute(NODE_NAME);
		String pack= type.getAttribute(NODE_PACKAGE);
		char[][] enclosingNames= getEnclosingNames(type);
		String path= type.getAttribute(NODE_PATH);
		int modifiers= 0;
		try {
			modifiers= Integer.parseInt(type.getAttribute(NODE_MODIFIERS));
		} catch (NumberFormatException e) {
			// take zero
		}
		TypeInfo info= fTypeInfoFactory.create(
			pack.toCharArray(), name.toCharArray(), enclosingNames, modifiers, path);
		return info;
	}

	protected void setAttributes(Object object, Element typeElement) {
		TypeInfo type= (TypeInfo)object;
		typeElement.setAttribute(NODE_NAME, type.getTypeName());
		typeElement.setAttribute(NODE_PACKAGE, type.getPackageName());
		typeElement.setAttribute(NODE_ENCLOSING_NAMES, type.getEnclosingName());
		typeElement.setAttribute(NODE_PATH, type.getPath());
		typeElement.setAttribute(NODE_MODIFIERS, Integer.toString(type.getModifiers()));
	}

	private char[][] getEnclosingNames(Element type) {
		String enclosingNames= type.getAttribute(NODE_ENCLOSING_NAMES);
		if (enclosingNames.length() == 0)
			return EMPTY_ENCLOSING_NAMES;
		StringTokenizer tokenizer= new StringTokenizer(enclosingNames, "."); //$NON-NLS-1$
		List names= new ArrayList();
		while(tokenizer.hasMoreTokens()) {
			String name= tokenizer.nextToken();
			names.add(name.toCharArray());
		}
		return (char[][])names.toArray(new char[names.size()][]);
	}
}

----------------------------------- SOURCE END -------------------------------------
!STACK 0
java.lang.NullPointerException
	at org.eclipse.jdt.internal.compiler.problem.ProblemReporter.invalidField(ProblemReporter.java:2878)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.reportError(QualifiedNameReference.java:958)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.resolveType(QualifiedNameReference.java:1026)
	at org.eclipse.jdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:344)
	at org.eclipse.jdt.internal.compiler.ast.Expression.resolve(Expression.java:884)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolveUsing(Block.java:115)
	at org.eclipse.jdt.internal.compiler.ast.TryStatement.resolve(TryStatement.java:687)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolve(Block.java:101)
	at org.eclipse.jdt.internal.compiler.ast.IfStatement.resolve(IfStatement.java:234)
	at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:432)
	at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:179)
	at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:403)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1054)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1101)
	at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:353)
	at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:687)
	at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:726)
	at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:174)
	at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:246)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:152)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:71)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:720)
	at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:779)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1120)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1092)
	at org.eclipse.jdt.internal.corext.util.JavaModelUtil.reconcile(JavaModelUtil.java:701)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.getElementAt(CompilationUnitEditor.java:1300)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$RememberedOffset.setOffset(CompilationUnitEditor.java:881)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$RememberedSelection.remember(CompilationUnitEditor.java:772)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.rememberSelection(CompilationUnitEditor.java:1832)
	at org.eclipse.ui.texteditor.AbstractTextEditor$4.run(AbstractTextEditor.java:337)
	at org.eclipse.ui.texteditor.AbstractTextEditor$ElementStateListener.execute(AbstractTextEditor.java:486)
	at org.eclipse.ui.texteditor.AbstractTextEditor$ElementStateListener.elementContentAboutToBeReplaced(AbstractTextEditor.java:341)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$FileBufferListener.bufferContentAboutToBeReplaced(TextFileDocumentProvider.java:252)
	at org.eclipse.core.internal.filebuffers.TextFileBufferManager$4.run(TextFileBufferManager.java:454)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.core.internal.filebuffers.TextFileBufferManager.fireBufferContentAboutToBeReplaced(TextFileBufferManager.java:452)
	at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.handleFileContentChanged(ResourceTextFileBuffer.java:473)
	at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.revert(ResourceFileBuffer.java:351)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$1.execute(TextFileDocumentProvider.java:709)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$DocumentProviderOperation.run(TextFileDocumentProvider.java:143)
	at org.eclipse.ui.actions.WorkspaceModifyDelegatingOperation.execute(WorkspaceModifyDelegatingOperation.java:68)
	at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:101)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1737)
	at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:113)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:73)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:63)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation(TextFileDocumentProvider.java:459)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.resetDocument(TextFileDocumentProvider.java:727)
	at org.eclipse.ui.texteditor.AbstractTextEditor.performRevert(AbstractTextEditor.java:3932)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.performRevert(JavaEditor.java:3573)
	at org.eclipse.ui.texteditor.AbstractTextEditor.doRevertToSaved(AbstractTextEditor.java:3912)
	at org.eclipse.ui.texteditor.StatusTextEditor.doRevertToSaved(StatusTextEditor.java:183)
	at org.eclipse.ui.texteditor.RevertToSavedAction.run(RevertToSavedAction.java:47)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:499)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:539)
	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488)
	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:400)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:925)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3346)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
	at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
	at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:169)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:615)
	at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
	at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
	at org.eclipse.core.launcher.Main.run(Main.java:977)
	at org.eclipse.core.launcher.Main.main(Main.java:952)

!ENTRY org.eclipse.jdt.core 4 1005 2006-04-06 16:15:04.740
!MESSAGE java.lang.NullPointerException
!STACK 0
java.lang.NullPointerException
	at org.eclipse.jdt.internal.compiler.problem.ProblemReporter.invalidField(ProblemReporter.java:2878)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.reportError(QualifiedNameReference.java:958)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.resolveType(QualifiedNameReference.java:1026)
	at org.eclipse.jdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:344)
	at org.eclipse.jdt.internal.compiler.ast.Expression.resolve(Expression.java:884)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolveUsing(Block.java:115)
	at org.eclipse.jdt.internal.compiler.ast.TryStatement.resolve(TryStatement.java:687)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolve(Block.java:101)
	at org.eclipse.jdt.internal.compiler.ast.IfStatement.resolve(IfStatement.java:234)
	at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:432)
	at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:179)
	at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:403)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1054)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1101)
	at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:353)
	at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:687)
	at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:726)
	at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:174)
	at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:246)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:152)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:71)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:720)
	at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:779)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1120)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1092)
	at org.eclipse.jdt.internal.corext.util.JavaModelUtil.reconcile(JavaModelUtil.java:701)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.getElementAt(CompilationUnitEditor.java:1300)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$RememberedOffset.setOffset(CompilationUnitEditor.java:881)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$RememberedSelection.remember(CompilationUnitEditor.java:772)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.rememberSelection(CompilationUnitEditor.java:1832)
	at org.eclipse.ui.texteditor.AbstractTextEditor$4.run(AbstractTextEditor.java:337)
	at org.eclipse.ui.texteditor.AbstractTextEditor$ElementStateListener.execute(AbstractTextEditor.java:486)
	at org.eclipse.ui.texteditor.AbstractTextEditor$ElementStateListener.elementContentAboutToBeReplaced(AbstractTextEditor.java:341)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$FileBufferListener.bufferContentAboutToBeReplaced(TextFileDocumentProvider.java:252)
	at org.eclipse.core.internal.filebuffers.TextFileBufferManager$4.run(TextFileBufferManager.java:454)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.core.internal.filebuffers.TextFileBufferManager.fireBufferContentAboutToBeReplaced(TextFileBufferManager.java:452)
	at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.handleFileContentChanged(ResourceTextFileBuffer.java:473)
	at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.revert(ResourceFileBuffer.java:351)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$1.execute(TextFileDocumentProvider.java:709)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider$DocumentProviderOperation.run(TextFileDocumentProvider.java:143)
	at org.eclipse.ui.actions.WorkspaceModifyDelegatingOperation.execute(WorkspaceModifyDelegatingOperation.java:68)
	at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:101)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1737)
	at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:113)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:73)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:63)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation(TextFileDocumentProvider.java:459)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.resetDocument(TextFileDocumentProvider.java:727)
	at org.eclipse.ui.texteditor.AbstractTextEditor.performRevert(AbstractTextEditor.java:3932)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.performRevert(JavaEditor.java:3573)
	at org.eclipse.ui.texteditor.AbstractTextEditor.doRevertToSaved(AbstractTextEditor.java:3912)
	at org.eclipse.ui.texteditor.StatusTextEditor.doRevertToSaved(StatusTextEditor.java:183)
	at org.eclipse.ui.texteditor.RevertToSavedAction.run(RevertToSavedAction.java:47)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:499)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:539)
	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488)
	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:400)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:925)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3346)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
	at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
	at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:169)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:615)
	at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
	at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
	at org.eclipse.core.launcher.Main.run(Main.java:977)
	at org.eclipse.core.launcher.Main.main(Main.java:952)

Comment 1 Olivier Thomann

2006-04-06 11:15:53 EDT

I will investigate.

Comment 2 Olivier Thomann

2006-04-06 11:19:00 EDT

This might come from the fact that the class name is a number.

Comment 3 Olivier Thomann

2006-04-06 11:27:29 EDT

This is supposed to be the class OpenTypeHistory. I don't understand why the name of the class is 56.
I'll investigate why we try to resolve fields for such a class.

Comment 4 Philipe Mulet

2006-04-06 11:41:58 EDT

I could imagine a bug in CVS update, or similar issue to cause the bogus scenario to occur.

Comment 5 Dani Megert

2006-04-06 11:46:48 EDT

I think I can explain the '56':

I opened the type and quickly wanted to go to line 56 but due the key binding bug in Platform UI the '56' was written into the editor and replaced the class name with '56'.

Comment 6 Olivier Thomann

2006-04-06 12:01:18 EDT

Simpler test case:
class 56 {

	private static class B {
		public static final String F = "";
	}

	private static class C {
	}
	
	public void foo() {
		System.out.println(B.F);
	}
}

The recovery retrieves this cu:

private static class B {
  public static final String F = "";
  private B() {
    super();
  }
  <clinit>() {
  }
}
private static class C {
  {
  }
  private C() {
    super();
  }
  public void foo() {
    System.out.println(B.F);
  }
}

So foo is attached to C. The resolution of B.F fails because the binding for F is a problem binding that has no declaring class. And when we report the error, we expect the declaring class to be there. It seems that F has no declaring class because B is private.
If you remove the private modifier in front of B, then you don't get the NPE.

Comment 7 Philipe Mulet

2006-04-07 09:00:32 EDT

Problem comes from a problem field binding not carrying enough infor for error reporting.
Added LookupTest#test063.
Fixed

Comment 8 Philipe Mulet

2006-04-08 04:17:44 EDT

*** Bug 127251 has been marked as a duplicate of this bug. ***

Comment 9 Maxime Daniel

2006-04-13 15:51:14 EDT

Verified for 3.2 RC1 using Build id: I20060413-0010.

The NPE is fixed.
Dani, would you please open a separate bug for the log optimization suggestion?