70981 – AST creation error thrown on minor syntax problem in java code editor

Bug 70981 - AST creation error thrown on minor syntax problem in java code editor

Summary: AST creation error thrown on minor syntax problem in java code editor

Status:	RESOLVED DUPLICATE of bug 70398

Alias:	None

Product:	JDT
Classification:	Eclipse Project
Component:	Core (show other bugs)
Version:	3.0
Hardware:	PC Windows 2000

Importance:	P3 normal (vote)
Target Milestone:	---
Assignee:	JDT-Core-Inbox
QA Contact:

URL:
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Keywords:

Depends on:
Blocks:

Reported:	2004-07-28 10:20 EDT by eric
Modified:	2004-07-28 11:37 EDT (History)
CC List:	0 users

See Also:

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Description eric

2004-07-28 10:20:55 EDT

Hello,

I'm seeing a strange error using Eclipse 3.0.  If I commit a small syntax error,
the source file I'm working on will no longer save (Null Pointer Exception), I
get constant AST errors (Null Pointer Exception), and trying to select all/copy
results in a "command for the key you pressed failed" error box.  I looked at
Bug 67969, but it appears to be a different bug, although it's also in the AST code.

I'm using Eclipse 3.0.0 (200406251208), and I have the jigloo and lomboz plugins
installed (but are not being used on this project).  I've got the J2SDK version
1.4.2_04-b05.

Here's some sample code that I can use to reproduce the error.  Leaving this
file as-is works fine, but if you "accidentally" make the comparison on the two
getInt() calls into a '=' instead of an '==', the AST errors start going.  No
error indicators show up to indicate that the assignment op rather than
comparison op is a problem, so it was somewhat difficult to determine where the
problem was coming from.

/*
 * FooClass.java created on Jul 27, 2004 by evonz
 */
package com.racoman.ccc.escalationbls.utils;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/** Oneline description here
 * Describe your class here
 * 
 * @author eric
 *
 */
public class FooClass {
	private List findSameGroupAlarms(Tester source, List testlist) {
		
		List samegroups = new ArrayList();
		Iterator it = testlist.iterator();
		while(it.hasNext()){
			Tester candidate = (Tester)it.next();
			if(candidate.getInt() == source.getInt()){
			    samegroups.add(candidate);
			}
		}
		return samegroups;
	}
	
	class Tester {
	    private boolean bBool = false;
	    private int intInt = 4;
	    
	    public int getInt() {
	        return intInt;
	    }
	    
	    public boolean getBool() {
	        return bBool;
	    }
	    
	}
	
}






Here's the log of the Save error:

!ENTRY org.eclipse.jdt.core 4 4 Jul 28, 2004 08:56:59.281
!MESSAGE Exception occurred during problem detection: 
!STACK 0
java.lang.NullPointerException
	at
org.eclipse.jdt.internal.compiler.ast.Assignment.checkAssignment(Assignment.java:67)
	at
org.eclipse.jdt.internal.compiler.ast.Assignment.resolveTypeExpecting(Assignment.java:191)
	at org.eclipse.jdt.internal.compiler.ast.IfStatement.resolve(IfStatement.java:221)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolve(Block.java:101)
	at
org.eclipse.jdt.internal.compiler.ast.WhileStatement.resolve(WhileStatement.java:209)
	at
org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:395)
	at
org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:134)
	at
org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:373)
	at
org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:920)
	at
org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:969)
	at
org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:280)
	at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:564)
	at
org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:176)
	at
org.eclipse.jdt.internal.core.CompilationUnit.buildStructure(CompilationUnit.java:146)
	at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:183)
	at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:572)
	at
org.eclipse.jdt.internal.core.CompilationUnit.makeConsistent(CompilationUnit.java:976)
	at
org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:58)
	at
org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:700)
	at
org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:739)
	at
org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1097)
	at
org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1060)
	at
org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitDocumentProvider.commitWorkingCopy(CompilationUnitDocumentProvider.java:886)
	at
org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitDocumentProvider$2.execute(CompilationUnitDocumentProvider.java:951)
	at
org.eclipse.ui.editors.text.TextFileDocumentProvider$DocumentProviderOperation.run(TextFileDocumentProvider.java:126)
	at
org.eclipse.ui.actions.WorkspaceModifyDelegatingOperation.execute(WorkspaceModifyDelegatingOperation.java:67)
	at
org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:91)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1673)
	at
org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:105)
	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:440)
	at
org.eclipse.ui.editors.text.TextFileDocumentProvider.saveDocument(TextFileDocumentProvider.java:699)
	at
org.eclipse.ui.texteditor.AbstractTextEditor.performSave(AbstractTextEditor.java:3535)
	at
org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.performSave(CompilationUnitEditor.java:1357)
	at
org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.doSave(CompilationUnitEditor.java:1410)
	at org.eclipse.ui.internal.EditorManager$12.run(EditorManager.java:1160)
	at org.eclipse.ui.internal.EditorManager$10.run(EditorManager.java:1015)
	at
org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:303)
	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:253)
	at org.eclipse.jface.window.ApplicationWindow$1.run(ApplicationWindow.java:588)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
	at org.eclipse.jface.window.ApplicationWindow.run(ApplicationWindow.java:585)
	at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:1653)
	at
org.eclipse.ui.internal.EditorManager.runProgressMonitorOperation(EditorManager.java:1021)
	at org.eclipse.ui.internal.EditorManager.savePart(EditorManager.java:1165)
	at org.eclipse.ui.internal.WorkbenchPage.savePart(WorkbenchPage.java:2539)
	at org.eclipse.ui.internal.WorkbenchPage.saveEditor(WorkbenchPage.java:2551)
	at org.eclipse.ui.internal.SaveAction.run(SaveAction.java:69)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:881)
	at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:141)
	at org.eclipse.ui.internal.commands.Command.execute(Command.java:132)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:471)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:889)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:930)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:548)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$2(WorkbenchKeyboard.java:496)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard$1.handleEvent(WorkbenchKeyboard.java:261)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:740)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:795)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:820)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:805)
	at org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1734)
	at org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1730)
	at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:3067)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:2970)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:3338)
	at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1467)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2429)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:254)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141)
	at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:96)
	at
org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:335)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129)
	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.core.launcher.Main.basicRun(Main.java:183)
	at org.eclipse.core.launcher.Main.run(Main.java:644)
	at org.eclipse.core.launcher.Main.main(Main.java:628)



Here's the AST error:

!ENTRY org.eclipse.core.runtime 4 2 Jul 28, 2004 08:57:00.828
!MESSAGE An internal error occurred during: "Java AST creation".
!STACK 0
java.lang.NullPointerException
	at
org.eclipse.jdt.internal.compiler.ast.Assignment.checkAssignment(Assignment.java:67)
	at
org.eclipse.jdt.internal.compiler.ast.Assignment.resolveTypeExpecting(Assignment.java:191)
	at org.eclipse.jdt.internal.compiler.ast.IfStatement.resolve(IfStatement.java:221)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolve(Block.java:101)
	at
org.eclipse.jdt.internal.compiler.ast.WhileStatement.resolve(WhileStatement.java:209)
	at
org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:395)
	at
org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:134)
	at
org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:373)
	at
org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:920)
	at
org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:969)
	at
org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:280)
	at
org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:436)
	at
org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:313)
	at org.eclipse.jdt.core.dom.ASTParser.internalCreateAST(ASTParser.java:657)
	at org.eclipse.jdt.core.dom.ASTParser.createAST(ASTParser.java:574)
	at
org.eclipse.jdt.internal.ui.javaeditor.ASTProvider.createAST(ASTProvider.java:441)
	at org.eclipse.jdt.internal.ui.javaeditor.ASTProvider.getAST(ASTProvider.java:393)
	at
org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$PartListenerGroup.calculateASTandInform(SelectionListenerWithASTManager.java:159)
	at
org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$3.run(SelectionListenerWithASTManager.java:136)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:66)


and here's the select all/copy error:

!ENTRY org.eclipse.ui 4 0 Jul 28, 2004 08:57:13.578
!MESSAGE The command for the key you pressed failed
!STACK 0
java.lang.NullPointerException
	at
org.eclipse.jdt.internal.compiler.ast.Assignment.checkAssignment(Assignment.java:67)
	at
org.eclipse.jdt.internal.compiler.ast.Assignment.resolveTypeExpecting(Assignment.java:191)
	at org.eclipse.jdt.internal.compiler.ast.IfStatement.resolve(IfStatement.java:221)
	at org.eclipse.jdt.internal.compiler.ast.Block.resolve(Block.java:101)
	at
org.eclipse.jdt.internal.compiler.ast.WhileStatement.resolve(WhileStatement.java:209)
	at
org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:395)
	at
org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:134)
	at
org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:373)
	at
org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:920)
	at
org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:969)
	at
org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:280)
	at
org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:436)
	at
org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:313)
	at org.eclipse.jdt.core.dom.ASTParser.internalCreateAST(ASTParser.java:657)
	at org.eclipse.jdt.core.dom.ASTParser.createAST(ASTParser.java:574)
	at
org.eclipse.jdt.internal.ui.javaeditor.ASTProvider.createAST(ASTProvider.java:441)
	at org.eclipse.jdt.internal.ui.javaeditor.ASTProvider.getAST(ASTProvider.java:393)
	at
org.eclipse.jdt.internal.ui.javaeditor.ClipboardOperationAction.getClipboardData(ClipboardOperationAction.java:363)
	at
org.eclipse.jdt.internal.ui.javaeditor.ClipboardOperationAction.doCutCopyWithImportsOperation(ClipboardOperationAction.java:300)
	at
org.eclipse.jdt.internal.ui.javaeditor.ClipboardOperationAction.internalDoOperation(ClipboardOperationAction.java:256)
	at
org.eclipse.jdt.internal.ui.javaeditor.ClipboardOperationAction$1.run(ClipboardOperationAction.java:225)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
	at
org.eclipse.jdt.internal.ui.javaeditor.ClipboardOperationAction.run(ClipboardOperationAction.java:223)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:881)
	at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:141)
	at org.eclipse.ui.internal.commands.Command.execute(Command.java:132)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:471)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:889)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:930)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:548)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$2(WorkbenchKeyboard.java:496)
	at
org.eclipse.ui.internal.keys.WorkbenchKeyboard$1.handleEvent(WorkbenchKeyboard.java:261)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:740)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:795)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:820)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:805)
	at org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1734)
	at org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1730)
	at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:3067)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:2970)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:3338)
	at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1467)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2429)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:254)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141)
	at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:96)
	at
org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:335)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129)
	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.core.launcher.Main.basicRun(Main.java:183)
	at org.eclipse.core.launcher.Main.run(Main.java:644)
	at org.eclipse.core.launcher.Main.main(Main.java:628)

Comment 1 Olivier Thomann

2004-07-28 11:37:54 EDT

Close as duplicate of bug 70398.

*** This bug has been marked as a duplicate of 70398 ***