Program: 121351
Project: 121351
Buggy source:
/** 
 * Set the name/label of the connection.
 * @param name
 */
@Override public void setName(String name){
  boolean canModify=true;
  List connections;
  if (target != null) {
    connections=target.getIncomingConnections();
    for (int i=0; i < connections.size(); i++) {
      if (((Connection)connections.get(i)).getName().equals(name)) {
        canModify=false;
      }
    }
  }
  if (canModify) {
    this.name=name;
    if (!lineStyle.equals(EConnectionType.TABLE) && !lineStyle.equals(EConnectionType.ITERATE)) {
      if (isInTypes(lineStyle,EConnectionType.ON_COMPONENT_OK,EConnectionType.ON_COMPONENT_ERROR,EConnectionType.ON_SUBJOB_OK,EConnectionType.ON_SUBJOB_ERROR,EConnectionType.RUN_IF,EConnectionType.ROUTE_WHEN,EConnectionType.ROUTE_CATCH,EConnectionType.STARTS) && source != null && source.getComponent().getName().equals(source.getLabel())) {
        uniqueName=connectorName;
      }
 else       if (!isInTypes(lineStyle,EConnectionType.ON_COMPONENT_OK,EConnectionType.ON_COMPONENT_ERROR,EConnectionType.ON_SUBJOB_OK,EConnectionType.ON_SUBJOB_ERROR,EConnectionType.RUN_IF,EConnectionType.ROUTE_WHEN,EConnectionType.ROUTE_CATCH,EConnectionType.STARTS) || uniqueName == null || !uniqueName.startsWith(lineStyle.getDefaultLinkName())) {
        uniqueName=name;
      }
    }
    if (source != null && lineStyle.hasConnectionCategory(IConnectionCategory.FLOW)) {
      if (getSourceNodeConnector().isMultiSchema()) {
        IMetadataTable table=getMetadataTable();
        table.setTableName(name);
        metaName=name;
      }
    }
    if (source != null && (lineStyle == EConnectionType.TABLE)) {
      IMetadataTable table=getMetadataTable();
      table.setLabel(name);
    }
    if (label == null) {
      label=new ConnectionLabel(name,this);
    }
    updateName();
  }
}

Fixed version (ground truth):
/** 
 * Set the name/label of the connection.
 * @param name
 */
@Override public void setName(String name){
  boolean canModify=true;
  List connections;
  if (target != null) {
    connections=target.getIncomingConnections();
    for (int i=0; i < connections.size(); i++) {
      if (((Connection)connections.get(i)).getName().equals(name)) {
        canModify=false;
      }
    }
  }
  if (canModify) {
    this.name=name;
    if (!lineStyle.equals(EConnectionType.TABLE) && !lineStyle.equals(EConnectionType.ITERATE)) {
      if (isInTypes(lineStyle,EConnectionType.ON_COMPONENT_OK,EConnectionType.ON_COMPONENT_ERROR,EConnectionType.ON_SUBJOB_OK,EConnectionType.ON_SUBJOB_ERROR,EConnectionType.RUN_IF,EConnectionType.ROUTE_WHEN,EConnectionType.ROUTE_CATCH,EConnectionType.STARTS) && source != null && source.getComponent().getName().equals(source.getLabel())) {
        uniqueName=connectorName;
      }
 else       if (!isInTypes(lineStyle,EConnectionType.ON_COMPONENT_OK,EConnectionType.ON_COMPONENT_ERROR,EConnectionType.ON_SUBJOB_OK,EConnectionType.ON_SUBJOB_ERROR,EConnectionType.RUN_IF,EConnectionType.ROUTE_WHEN,EConnectionType.ROUTE_CATCH,EConnectionType.STARTS) || uniqueName == null || !uniqueName.startsWith(lineStyle.getDefaultLinkName())) {
        if (Pattern.matches("String_Node_Str",name)) {
          uniqueName=name;
        }
 else {
          uniqueName=lineStyle.getDefaultLinkName();
        }
      }
    }
    if (source != null && lineStyle.hasConnectionCategory(IConnectionCategory.FLOW)) {
      if (getSourceNodeConnector().isMultiSchema()) {
        IMetadataTable table=getMetadataTable();
        table.setTableName(name);
        metaName=name;
      }
    }
    if (source != null && (lineStyle == EConnectionType.TABLE)) {
      IMetadataTable table=getMetadataTable();
      table.setLabel(name);
    }
    if (label == null) {
      label=new ConnectionLabel(name,this);
    }
    updateName();
  }
}