Bugzilla – Full Text Bug Listing
| Summary: | [OLE] NPE in OLE code | ||||||||||
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| Product: | [Eclipse Project] Platform | Reporter: | Jonathan Camilleri <camilleri.jon> | ||||||||
| Component: | SWT | Assignee: | Platform-SWT-Inbox <platform-swt-inbox> | ||||||||
| Status: | CLOSED WORKSFORME | QA Contact: | |||||||||
| Severity: | normal | ||||||||||
| Priority: | P3 | CC: | ericwill, Olivier_Thomann, remy.suen, Silenio_Quarti | ||||||||
| Version: | 3.4.2 | Keywords: | triaged | ||||||||
| Target Milestone: | --- | ||||||||||
| Hardware: | All | ||||||||||
| OS: | All | ||||||||||
| Whiteboard: | |||||||||||
| Attachments: |
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Description
Jonathan Camilleri
Comment on attachment 136102 [details]
Source code and video demo of problem
NOTE: Please ignore the file named ReflectionPlayground.rar within the attachment.
(In reply to comment #0) > Created an attachment (id=136102) [details] > Source code and video demo of problem > > Build ID: Build id: M20090211-1700 > > Steps To Reproduce: > See video and source code for further information. Note that video requires > TeamViewer (http://www.teamviewer.com/index.aspx) to be able to open the video > file. Jonathan, some of us uses Linux and this third-party TeamViewer application does not seem to run on Linux. Please provide reproducible steps in text. I noticed that there is an error about an NPE in your rar file. Can you attach your workspace's log file? See workspace/.metadata/.log. Well, I'm trying to type in Vector in the IDE, and, even though I inserted the import statement at the top of the source file, Eclipse just "does not recognize it". The funny thing about this error is that it is ad-hoc and happens when declaring a Vector within a static void:
import java.util.*
//this should let the IDE know that Vector can be used, right?
class X
{
...
static void main {....}
...
static void myMethod (Object someValue)
{
//I try to type 'Vector' and an error is displayed: Vector cannot be resolved.
Vector<?> myVector = new Vector<?>;
}
}
I'll try to get a linux box and screen capturing software for UX when something weird happens with my Windows box; hope not too soon :)
Created attachment 136105 [details]
log file
I suppose ECJ's error message could be improved. I've tried this on I20090513-2000.
import java.util.Vector;
public class ArrayGrowTest {
void printArray() {
Vector<?> v = new Vector<?>();
}
}
The code above gives 'Cannot instantiate the type Vector<?>' which isn't very helpful.
javac seems to do a better job.
/opt/sun-jdk-1.5.0.17/bin/javac ArrayGrowTest.java
ArrayGrowTest.java:6: unexpected type
found : ?
required: class or interface without bounds
Vector<?> v = new Vector<?>();
^
1 error
Sorry. Well I was doing something like this in the video ..
...
import java.util.*;
class myClass
...
public int[] growArray (Object someContainer)
{
Vector ... when I typed vector an error is displayed: Vector cannot be resolved.
{
...
I had a similar problem to this one on a different code snippet:
...
import java.lang.reflect.*; //this should be fine
import java.lang.reflect.Method; //added this just in case...
...
@SuppressWarnings("unchecked")
public static void runMethod (Class<?> cl, String methodName){
Class _cl = cl.getClass().getClass();
Method[] _methods = _cl.getClass().getMethods();
if (_methods.equals(methodName))
Method _methodToRun = new Method();
//Errors displayed:
// 1. _methodToRun cannot be resolved
// 2. Method cannot be resolved
// 3. Type mismatch: cannot convert from Method to Method[]. The suggestion to change type of methods to Method is incorrect, because
_cl.getClass().getMethods() returns a Method[] not a Method (subtle).
java.lang.reflect.Method _methods = new Method();
}
...
Created attachment 136125 [details]
Source code
I had a little coding mistake in my previous comment since I used an existing variable name. It would be helpful if the IDE displayed 'variable already in use', which I believe sometimes it does when I do this mistake.
@SuppressWarnings("unchecked")
public static void runMethod (Class<?> cl, String methodName){
Class _cl = cl.getClass().getClass();
Method[] _methods = _cl.getClass().getMethods();
if (_methods.equals(methodName))
Method _mymethods = new Method();
}
When you get the error, is your code syntactically correct ? I thought this bug reporting tool regarded Eclipse. I think so. (In reply to comment #5) > The code above gives 'Cannot instantiate the type Vector<?>' which isn't very > helpful. Maybe. But this doesn't say that the type cannot be resolved as far as I know. (In reply to comment #8) > Created an attachment (id=136125) [details] > Source code I don't get any error with this code. The NPE comes from SWT code. Moving to Platform/SWT Olivier, were you able to reproduce this bug? Felipe, I moved the bug in SWT because of this exception in the .log file. java.lang.NullPointerException at org.eclipse.swt.ole.win32.OleAutomation.<init>(OleAutomation.java:122) at org.eclipse.ui.internal.editorsupport.win32.OleEditor.handleWord(OleEditor.java:404) at org.eclipse.ui.internal.editorsupport.win32.OleEditor.oleActivate(OleEditor.java:650) at org.eclipse.ui.internal.editorsupport.win32.OleEditor.activateClient(OleEditor.java:212) at org.eclipse.ui.internal.editorsupport.win32.OleEditor.access$3(OleEditor.java:210) at org.eclipse.ui.internal.editorsupport.win32.OleEditor$4.partActivated(OleEditor.java:165) at org.eclipse.ui.internal.PartListenerList$1.run(PartListenerList.java:72) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37) at org.eclipse.core.runtime.Platform.run(Platform.java:880) at org.eclipse.ui.internal.PartListenerList.fireEvent(PartListenerList.java:57) at org.eclipse.ui.internal.PartListenerList.firePartActivated(PartListenerList.java:70) at org.eclipse.ui.internal.PartService.firePartActivated(PartService.java:186) at org.eclipse.ui.internal.PartService.setActivePart(PartService.java:305) at org.eclipse.ui.internal.WorkbenchPagePartList.fireActivePartChanged(WorkbenchPagePartList.java:56) at org.eclipse.ui.internal.PartList.setActivePart(PartList.java:126) at org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3491) at org.eclipse.ui.internal.WorkbenchPage.activate(WorkbenchPage.java:610) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2832) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2729) at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2721) at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2673) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2668) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2652) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2643) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:646) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:605) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:318) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:160) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:228) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:207) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:274) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:250) at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:583) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:500) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193) 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:386) 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:549) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504) at org.eclipse.equinox.launcher.Main.run(Main.java:1236) I didn't get it myself. Did you notice this: !ENTRY org.eclipse.jdt.ui 4 10001 2009-05-15 20:19:35.701 !MESSAGE Internal Error !STACK 1 org.eclipse.core.runtime.CoreException: The fix 'Add type parameters to 'Class'' generated a null change. at org.eclipse.jdt.internal.corext.fix.CompilationUnitRewriteOperationsFix.createChange(CompilationUnitRewriteOperationsFix.java:104) at org.eclipse.jdt.internal.ui.text.correction.proposals.FixCorrectionProposal.createTextChange(FixCorrectionProposal.java:151) at org.eclipse.jdt.internal.ui.text.correction.proposals.CUCorrectionProposal.createChange(CUCorrectionProposal.java:392) at org.eclipse.jdt.internal.ui.text.correction.proposals.ChangeCorrectionProposal.getChange(ChangeCorrectionProposal.java:253) at org.eclipse.jdt.internal.ui.text.correction.proposals.ChangeCorrectionProposal.performChange(ChangeCorrectionProposal.java:109) at org.eclipse.jdt.internal.ui.text.correction.proposals.CUCorrectionProposal.performChange(CUCorrectionProposal.java:326) at org.eclipse.jdt.internal.ui.text.correction.proposals.CUCorrectionProposal.apply(CUCorrectionProposal.java:304) at org.eclipse.jdt.internal.ui.text.correction.proposals.FixCorrectionProposal.apply(FixCorrectionProposal.java:183) at org.eclipse.jdt.internal.ui.text.java.hover.AbstractAnnotationHover$AnnotationInformationControl.apply(AbstractAnnotationHover.java:498) at org.eclipse.jdt.internal.ui.text.java.hover.AbstractAnnotationHover$AnnotationInformationControl.access$2(AbstractAnnotationHover.java:480) at org.eclipse.jdt.internal.ui.text.java.hover.AbstractAnnotationHover$5.widgetSelected(AbstractAnnotationHover.java:473) ------- This is probably the exception that is affecting Jonathan. I didn't get any details once I reported that I cannot reproduce the issue. I could not get the NPE. Jonathan, please open a new bug report with good steps to reproduce. Not a team viewer video. The source code didn't let me reproduce the issue. Sorry, but it's been a while and I don't remember the details of this issue. (In reply to Jonathan Camilleri from comment #18) > Sorry, but it's been a while and I don't remember the details of this issue. Based on this, closing. Please feel free to re-open if the issue persists. |