Program: 152064
Project: 152064
Buggy source:
public boolean importData(JComponent comp,Transferable t){
  boolean local=t.isDataFlavorSupported(LOCAL_NODE_TRANSFER_FLAVOR);
  Object data;
  try {
    data=t.getTransferData(local ? LOCAL_NODE_TRANSFER_FLAVOR : ToolUtil.SERIALIZED_WRAPPED_FLAVOR);
  }
 catch (  Exception e) {
    log.warning("String_Node_Str",e);
    return false;
  }
  ConfigTreeNode node, onode=null;
  if (local) {
    NodeTransfer transfer=(NodeTransfer)data;
    node=transfer.cnode;
    onode=transfer.onode;
  }
 else {
    data=((SerializableWrapper)data).getObject();
    if (!(data instanceof ConfigTreeNode)) {
      return false;
    }
    node=(ConfigTreeNode)data;
  }
  if (!node.verifyConfigClass(_groups[0].getConfigClass())) {
    return false;
  }
  ConfigTreeNode snode=getSelectedNode();
  ConfigTreeNode parent=(ConfigTreeNode)getModel().getRoot();
  if (snode != null && snode.getParent() != null) {
    parent=snode.getAllowsChildren() ? snode : (ConfigTreeNode)snode.getParent();
  }
  if (onode == parent || (onode != null && onode.getParent() == parent)) {
    return false;
  }
  node=(ConfigTreeNode)node.clone();
  String name=(String)node.getUserObject();
  node.setUserObject(parent.findNameForChild(name));
  if (onode != null && onode.getRoot() == parent.getRoot()) {
    ((DefaultTreeModel)getModel()).removeNodeFromParent(onode);
  }
  ((DefaultTreeModel)getModel()).insertNodeInto(node,parent,parent.getInsertionIndex(node));
  node.expandPaths(ConfigTree.this);
  setSelectionPath(new TreePath(node.getPath()));
  return true;
}

Fixed version (ground truth):
public boolean importData(JComponent comp,Transferable t){
  if (!canImport(comp,t.getTransferDataFlavors())) {
    return false;
  }
  boolean local=t.isDataFlavorSupported(LOCAL_NODE_TRANSFER_FLAVOR);
  Object data;
  try {
    data=t.getTransferData(local ? LOCAL_NODE_TRANSFER_FLAVOR : ToolUtil.SERIALIZED_WRAPPED_FLAVOR);
  }
 catch (  Exception e) {
    log.warning("String_Node_Str",e);
    return false;
  }
  ConfigTreeNode node, onode=null;
  if (local) {
    NodeTransfer transfer=(NodeTransfer)data;
    node=transfer.cnode;
    onode=transfer.onode;
  }
 else {
    data=((SerializableWrapper)data).getObject();
    if (!(data instanceof ConfigTreeNode)) {
      return false;
    }
    node=(ConfigTreeNode)data;
  }
  if (!node.verifyConfigClass(_groups[0].getConfigClass())) {
    return false;
  }
  ConfigTreeNode snode=getSelectedNode();
  ConfigTreeNode parent=(ConfigTreeNode)getModel().getRoot();
  if (snode != null && snode.getParent() != null) {
    parent=snode.getAllowsChildren() ? snode : (ConfigTreeNode)snode.getParent();
  }
  if (onode == parent || (onode != null && onode.getParent() == parent)) {
    return false;
  }
  node=(ConfigTreeNode)node.clone();
  String name=(String)node.getUserObject();
  node.setUserObject(parent.findNameForChild(name));
  if (onode != null && onode.getRoot() == parent.getRoot()) {
    ((DefaultTreeModel)getModel()).removeNodeFromParent(onode);
  }
  ((DefaultTreeModel)getModel()).insertNodeInto(node,parent,parent.getInsertionIndex(node));
  node.expandPaths(ConfigTree.this);
  setSelectionPath(new TreePath(node.getPath()));
  return true;
}