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Build Identifier: 3.7.0 I20110310-1119 (M6) java.lang.IllegalArgumentException: Argument cannot be null at org.eclipse.swt.SWT.error(SWT.java:4258) at org.eclipse.swt.SWT.error(SWT.java:4192) at org.eclipse.swt.SWT.error(SWT.java:4163) at org.eclipse.swt.graphics.GC.<init>(GC.java:156) at org.eclipse.swt.graphics.GC.<init>(GC.java:125) at org.eclipse.jface.text.WhitespaceCharacterPainter.<init>(WhitespaceCharacterPainter.java:90) at org.eclipse.jface.text.WhitespaceCharacterPainter.<init>(WhitespaceCharacterPainter.java:118) at org.eclipse.ui.texteditor.ShowWhitespaceCharactersAction.installPainter(ShowWhitespaceCharactersAction.java:119) at org.eclipse.ui.texteditor.ShowWhitespaceCharactersAction.togglePainterState(ShowWhitespaceCharactersAction.java:192) at org.eclipse.ui.texteditor.ShowWhitespaceCharactersAction.synchronizeWithPreference(ShowWhitespaceCharactersAction.java:178) at org.eclipse.ui.texteditor.ShowWhitespaceCharactersAction.update(ShowWhitespaceCharactersAction.java:106) at org.eclipse.ui.texteditor.AbstractTextEditor.handlePreferenceStoreChanged(AbstractTextEditor.java:4658) at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.handlePreferenceStoreChanged(AbstractDecoratedTextEditor.java:875) at org.eclipse.ui.editors.text.TextEditor.handlePreferenceStoreChanged(TextEditor.java:218) at tk.eclipse.plugin.htmleditor.editors.HTMLSourceEditor.handlePreferenceStoreChanged(HTMLSourceEditor.java:216) at org.eclipse.ui.texteditor.AbstractTextEditor$PropertyChangeListener.propertyChange(AbstractTextEditor.java:710) at org.eclipse.ui.texteditor.ChainedPreferenceStore.firePropertyChangeEvent(ChainedPreferenceStore.java:164) at org.eclipse.ui.texteditor.ChainedPreferenceStore.handlePropertyChangeEvent(ChainedPreferenceStore.java:431) at org.eclipse.ui.texteditor.ChainedPreferenceStore.access$0(ChainedPreferenceStore.java:408) at org.eclipse.ui.texteditor.ChainedPreferenceStore$PropertyChangeListener.propertyChange(ChainedPreferenceStore.java:69) at org.eclipse.ui.preferences.ScopedPreferenceStore$3.run(ScopedPreferenceStore.java:375) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.preferences.ScopedPreferenceStore.firePropertyChangeEvent(ScopedPreferenceStore.java:372) at org.eclipse.ui.preferences.ScopedPreferenceStore.setValue(ScopedPreferenceStore.java:813) at org.eclipse.ui.texteditor.ShowWhitespaceCharactersAction.run(ShowWhitespaceCharactersAction.java:98) at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) at org.eclipse.ui.actions.RetargetAction.runWithEvent(RetargetAction.java:230) at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:234) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501) at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:452) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3568) Reproducible: Always Steps to Reproduce: 1. Open Java or default text editor 2. Click on "Show whitespace characters" button 3. Enjoy the error dialog
> 3. Enjoy the error dialog Maybe the provider of the HTMLSourceEditor has more fun with this ;-) The problem is in tk.eclipse.plugin.htmleditor.editors.HTMLSourceEditor.handlePreferenceStoreChanged(HTMLSourceEditor.java:216) It looks like this editor doesn't remove its listeners upon close/dispose.
(In reply to comment #1) > The problem is in > tk.eclipse.plugin.htmleditor.editors.HTMLSourceEditor I'm very sorry, I've overseen this line.
(In reply to comment #2) > (In reply to comment #1) > > The problem is in > > tk.eclipse.plugin.htmleditor.editors.HTMLSourceEditor > > I'm very sorry, I've overseen this line. np.
