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 (ifStatement.getElseStatement() != null) {
			return false;
		}
		
		ASTNode ifParent = ifStatement.getParent();
		Block ifParentBlock = null;
		ASTNode ifParentStructure = ifParent;
		if (ifParentStructure instanceof Block) {
			ifParentBlock = (Block) ifParent;
			ifParentStructure = ifParentStructure.getParent();
		}
		
		if (!(ifParentStructure instanceof ForStatement) && !(ifParentStructure instanceof WhileStatement)) {
			return false;
		}
		if ((ifParentBlock != null)
				&& (ifParentBlock.statements().indexOf(ifStatement) != ifParentBlock.statements().size() - 1)) {
			return false;
		}
		
		if (resultingCollections == null) {
			return true;
		}
		
		AST ast = coveringStatement.getAST();
		ASTRewrite rewrite = ASTRewrite.create(ast);
		
		Expression inversedExpression = getInversedBooleanExpression(ast, rewrite, ifStatement.getExpression());
		IfStatement newIf = ast.newIfStatement();
		newIf.setExpression(inversedExpression);