Bug 73347 NPE in AdvancedQuickAssistProcessor.getInverseConditionProposals
I20040901 + plug-in export, J9 JXE Got this in log several times a day. No steps. !ENTRY org.eclipse.jdt.ui 4 10001 Sep 06, 2004 18:46:20.502 !MESSAGE Internal Error !STACK 0 java.lang.NullPointerException at org.eclipse.jdt.internal.ui.text.correction.AdvancedQuickAssistProcessor.getInverseConditionProposals(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.AdvancedQuickAssistProcessor.hasAssists(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor.hasAssists(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater.calculateLightBulb(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater.doSelectionChanged(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater.access$0(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater$1.selectionChanged(Unknown Source) at org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$PartListenerGroup.calculateASTandInform(Unknown Source) at org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$3.run(Unknown Source) at org.eclipse.core.internal.jobs.Worker.run(Unknown Source)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/AdvancedQuickAssistProcessor.java
if (!(covered instanceof Expression)) {
				continue;
			}
			Expression coveredExpression = (Expression) covered;
			ITypeBinding typeBinding = coveredExpression.resolveTypeBinding();
			if ((typeBinding == null) || !typeBinding.getName().equals("boolean")) { 
				continue;
			}
			
			Expression inversedExpression = getInversedBooleanExpression(ast, rewrite, coveredExpression);
			rewrite.replace(coveredExpression, inversedExpression, null);
			changedNodes.add(coveredExpression);
		}
		
		if (changedNodes.isEmpty()) {
			return false;
		}
		
		String label = CorrectionMessages.getString("AdvancedQuickAssistProcessor.inverseConditions.description"); 
		Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
		ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(),
				rewrite, 1, image);
		resultingCollections.add(proposal);
		return true;
	}
	private static Expression getInversedBooleanExpression(AST ast, ASTRewrite rewrite, Expression expression) {
		if (expression instanceof InfixExpression) {
			InfixExpression infixExpression = (InfixExpression) expression;
			InfixExpression.Operator operator = infixExpression.getOperator();
			if (operator == InfixExpression.Operator.LESS) {