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Reproduced in build 200708220000. To reproduce the bug: - create an XSL transformaton; - bind a source node to a tagget node; - delete the binding; - make the same binding from target to source. java.lang.NullPointerException at org.netbeans.modules.xslt.mapper.model.nodes.visitor.AbstractNodeVisitor.acceptUpstream(AbstractNodeVisitor.java:70) at org.netbeans.modules.xslt.mapper.model.FindUsedPredicateNodesVisitor.visit(FindUsedPredicateNodesVisitor.java:54) at org.netbeans.modules.xslt.mapper.model.targettree.ElementDeclarationNode.accept(ElementDeclarationNode.java:123) at org.netbeans.modules.xslt.mapper.model.nodes.visitor.AbstractNodeVisitor.acceptDownTree(AbstractNodeVisitor.java:94) at org.netbeans.modules.xslt.mapper.model.FindUsedPredicateNodesVisitor.visit(FindUsedPredicateNodesVisitor.java:66) at org.netbeans.modules.xslt.mapper.model.targettree.RuleNode.accept(RuleNode.java:82) at org.netbeans.modules.xslt.mapper.view.PredicateManager.clearTemporaryPredicates(PredicateManager.java:299) at org.netbeans.modules.xslt.mapper.view.DiagramBuilder.updateDiagram(DiagramBuilder.java:77) at org.netbeans.modules.xslt.mapper.model.XsltModelBridge.onModelChanged(XsltModelBridge.java:196) at org.netbeans.modules.xslt.mapper.model.ModelBridge$UpdateTimer$1.actionPerformed(ModelBridge.java:71) at javax.swing.Timer.fireActionPerformed(Timer.java:271) ...
*** This issue has been marked as a duplicate of 113235 ***