Program: 42400
Project: 42400
Buggy source:
private AbstractAggregationBuilder agg(final Aggregation aggregation,final Integer index) throws CrabsException {
  final String name=index.toString();
  if (aggregation instanceof CountFunction) {
    final CountFunction count=CountFunction.class.cast(aggregation);
    final Reference operand=Reference.class.cast(count.getOperandExpression(0));
    if (operand.columnIdentifier.equals(Reference.ALL_COLUMN_IDENTIFIER)) {
      return AggregationBuilders.count(name).field(this.context.typeDefinition.getFieldDefinition(0).getIdentifier().toString());
    }
    return AggregationBuilders.count(name).field(operand.columnIdentifier.toString());
  }
 else   if (aggregation instanceof SummaryFunction) {
    final SummaryFunction summary=SummaryFunction.class.cast(aggregation);
    return AggregationBuilders.sum(name).field(Reference.class.cast(summary.getOperandExpression(0)).columnIdentifier.toString());
  }
 else   if (aggregation instanceof AverageFunction) {
    final AverageFunction average=AverageFunction.class.cast(aggregation);
    return AggregationBuilders.avg(name).field(Reference.class.cast(average.getOperandExpression(0)).columnIdentifier.toString());
  }
 else   if (aggregation instanceof MaxinumFunction) {
    final MaxinumFunction maxinum=MaxinumFunction.class.cast(aggregation);
    return AggregationBuilders.max(name).field(Reference.class.cast(maxinum.getOperandExpression(0)).columnIdentifier.toString());
  }
 else   if (aggregation instanceof MininumFunction) {
    final MininumFunction mininum=MininumFunction.class.cast(aggregation);
    return AggregationBuilders.min(name).field(Reference.class.cast(mininum.getOperandExpression(0)).columnIdentifier.toString());
  }
  throw new CrabsException("String_Node_Str" + aggregation + "String_Node_Str");
}

Fixed version (ground truth):
private AbstractAggregationBuilder agg(final Aggregation aggregation,final Integer index) throws CrabsException {
  final String name=index.toString();
  if (aggregation instanceof CountFunction) {
    final CountFunction count=CountFunction.class.cast(aggregation);
    final Reference operand=Reference.class.cast(count.getOperandExpression(0));
    if (operand.columnIdentifier.equals(Reference.ALL_COLUMN_IDENTIFIER)) {
      return AggregationBuilders.count(name).field(this.context.typeDefinition.getPrimaryFieldDefinition().getIdentifier().toString());
    }
    return AggregationBuilders.count(name).field(operand.columnIdentifier.toString());
  }
 else   if (aggregation instanceof SummaryFunction) {
    final SummaryFunction summary=SummaryFunction.class.cast(aggregation);
    return AggregationBuilders.sum(name).field(Reference.class.cast(summary.getOperandExpression(0)).columnIdentifier.toString());
  }
 else   if (aggregation instanceof AverageFunction) {
    final AverageFunction average=AverageFunction.class.cast(aggregation);
    return AggregationBuilders.avg(name).field(Reference.class.cast(average.getOperandExpression(0)).columnIdentifier.toString());
  }
 else   if (aggregation instanceof MaxinumFunction) {
    final MaxinumFunction maxinum=MaxinumFunction.class.cast(aggregation);
    return AggregationBuilders.max(name).field(Reference.class.cast(maxinum.getOperandExpression(0)).columnIdentifier.toString());
  }
 else   if (aggregation instanceof MininumFunction) {
    final MininumFunction mininum=MininumFunction.class.cast(aggregation);
    return AggregationBuilders.min(name).field(Reference.class.cast(mininum.getOperandExpression(0)).columnIdentifier.toString());
  }
  throw new CrabsException("String_Node_Str" + aggregation + "String_Node_Str");
}