Program: 112145
Project: 112145
Buggy source:
public RecordConsumer getRecordWriter(){
  return new RecordConsumer(){
    ColumnIO currentColumnIO;
    int currentLevel=0;
    int[] currentIndex=new int[16];
    int[] r=new int[16];
    public void printState(){
      log(currentLevel + "String_Node_Str" + currentIndex[currentLevel]+ "String_Node_Str"+ Arrays.toString(currentColumnIO.getFieldPath())+ "String_Node_Str"+ r[currentLevel]);
      if (r[currentLevel] > currentColumnIO.getRepetitionLevel()) {
        throw new RuntimeException(r[currentLevel] + "String_Node_Str" + currentColumnIO.getRepetitionLevel()+ "String_Node_Str");
      }
    }
    private void log(    Object m){
      String indent="String_Node_Str";
      for (int i=0; i < currentLevel; ++i) {
        indent+="String_Node_Str";
      }
      logger.debug(indent + m);
    }
    @Override public void startMessage(){
      if (DEBUG)       log("String_Node_Str");
      currentColumnIO=MessageColumnIO.this;
      r[0]=0;
      currentIndex[0]=0;
      if (DEBUG)       printState();
    }
    @Override public void endMessage(){
      if (DEBUG)       log("String_Node_Str");
      if (DEBUG)       printState();
    }
    @Override public void startField(    String field,    int index){
      try {
        if (DEBUG)         log("String_Node_Str" + field + "String_Node_Str"+ index+ "String_Node_Str");
        writeNullForMissingFields(index - 1);
        currentColumnIO=((GroupColumnIO)currentColumnIO).getChild(index);
        currentIndex[currentLevel]=index;
        if (DEBUG)         printState();
      }
 catch (      RuntimeException e) {
        throw new RuntimeException("String_Node_Str" + field + "String_Node_Str"+ index,e);
      }
    }
    private void writeNullForMissingFields(    final int to){
      final int from=currentIndex[currentLevel];
      for (; currentIndex[currentLevel] <= to; ++currentIndex[currentLevel]) {
        try {
          ColumnIO undefinedField=((GroupColumnIO)currentColumnIO).getChild(currentIndex[currentLevel]);
          int d=currentColumnIO.getDefinitionLevel();
          if (DEBUG)           log(Arrays.toString(undefinedField.getFieldPath()) + "String_Node_Str" + r[currentLevel]+ "String_Node_Str"+ d+ "String_Node_Str");
          undefinedField.writeNull(r[currentLevel],d);
        }
 catch (        RuntimeException e) {
          throw new RuntimeException("String_Node_Str" + from + "String_Node_Str"+ to+ "String_Node_Str"+ currentIndex[currentLevel],e);
        }
      }
    }
    private void setRepetitionLevel(){
      r[currentLevel]=currentColumnIO.getRepetitionLevel();
      if (DEBUG)       log("String_Node_Str" + r[currentLevel]);
    }
    @Override public void endField(    String field,    int index){
      if (DEBUG)       log("String_Node_Str" + field + "String_Node_Str"+ index+ "String_Node_Str");
      currentColumnIO=currentColumnIO.getParent();
      currentIndex[currentLevel]=index + 1;
      r[currentLevel]=currentLevel == 0 ? 0 : r[currentLevel - 1];
      if (DEBUG)       printState();
    }
    @Override public void startGroup(){
      if (DEBUG)       log("String_Node_Str");
      ++currentLevel;
      r[currentLevel]=r[currentLevel - 1];
      currentIndex[currentLevel]=0;
      if (DEBUG)       printState();
    }
    @Override public void endGroup(){
      if (DEBUG)       log("String_Node_Str");
      int lastIndex=((GroupColumnIO)currentColumnIO).getChildrenCount() - 1;
      writeNullForMissingFields(lastIndex);
      --currentLevel;
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addInt(    int value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addLong(    long value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addString(    String value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addBoolean(    boolean value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addBinary(    byte[] value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addFloat(    float value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addDouble(    double value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
  }
;
}

Fixed version (ground truth):
public RecordConsumer getRecordWriter(){
  return new RecordConsumer(){
    ColumnIO currentColumnIO;
    int currentLevel=0;
    int[] currentIndex=new int[16];
    int[] r=new int[16];
    public void printState(){
      log(currentLevel + "String_Node_Str" + currentIndex[currentLevel]+ "String_Node_Str"+ Arrays.toString(currentColumnIO.getFieldPath())+ "String_Node_Str"+ r[currentLevel]);
      if (r[currentLevel] > currentColumnIO.getRepetitionLevel()) {
        throw new RuntimeException(r[currentLevel] + "String_Node_Str" + currentColumnIO.getRepetitionLevel()+ "String_Node_Str");
      }
    }
    private void log(    Object m){
      String indent="String_Node_Str";
      for (int i=0; i < currentLevel; ++i) {
        indent+="String_Node_Str";
      }
      logger.debug(indent + m);
    }
    @Override public void startMessage(){
      if (DEBUG)       log("String_Node_Str");
      currentColumnIO=MessageColumnIO.this;
      r[0]=0;
      currentIndex[0]=0;
      if (DEBUG)       printState();
    }
    @Override public void endMessage(){
      writeNullForMissingFields(((GroupColumnIO)currentColumnIO).getChildrenCount() - 1);
      if (DEBUG)       log("String_Node_Str");
      if (DEBUG)       printState();
    }
    @Override public void startField(    String field,    int index){
      try {
        if (DEBUG)         log("String_Node_Str" + field + "String_Node_Str"+ index+ "String_Node_Str");
        writeNullForMissingFields(index - 1);
        currentColumnIO=((GroupColumnIO)currentColumnIO).getChild(index);
        currentIndex[currentLevel]=index;
        if (DEBUG)         printState();
      }
 catch (      RuntimeException e) {
        throw new RuntimeException("String_Node_Str" + field + "String_Node_Str"+ index,e);
      }
    }
    private void writeNullForMissingFields(    final int to){
      final int from=currentIndex[currentLevel];
      for (; currentIndex[currentLevel] <= to; ++currentIndex[currentLevel]) {
        try {
          ColumnIO undefinedField=((GroupColumnIO)currentColumnIO).getChild(currentIndex[currentLevel]);
          int d=currentColumnIO.getDefinitionLevel();
          if (DEBUG)           log(Arrays.toString(undefinedField.getFieldPath()) + "String_Node_Str" + r[currentLevel]+ "String_Node_Str"+ d+ "String_Node_Str");
          undefinedField.writeNull(r[currentLevel],d);
        }
 catch (        RuntimeException e) {
          throw new RuntimeException("String_Node_Str" + from + "String_Node_Str"+ to+ "String_Node_Str"+ currentIndex[currentLevel],e);
        }
      }
    }
    private void setRepetitionLevel(){
      r[currentLevel]=currentColumnIO.getRepetitionLevel();
      if (DEBUG)       log("String_Node_Str" + r[currentLevel]);
    }
    @Override public void endField(    String field,    int index){
      if (DEBUG)       log("String_Node_Str" + field + "String_Node_Str"+ index+ "String_Node_Str");
      currentColumnIO=currentColumnIO.getParent();
      currentIndex[currentLevel]=index + 1;
      r[currentLevel]=currentLevel == 0 ? 0 : r[currentLevel - 1];
      if (DEBUG)       printState();
    }
    @Override public void startGroup(){
      if (DEBUG)       log("String_Node_Str");
      ++currentLevel;
      r[currentLevel]=r[currentLevel - 1];
      currentIndex[currentLevel]=0;
      if (DEBUG)       printState();
    }
    @Override public void endGroup(){
      if (DEBUG)       log("String_Node_Str");
      int lastIndex=((GroupColumnIO)currentColumnIO).getChildrenCount() - 1;
      writeNullForMissingFields(lastIndex);
      --currentLevel;
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addInt(    int value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addLong(    long value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addString(    String value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addBoolean(    boolean value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addBinary(    byte[] value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addFloat(    float value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
    @Override public void addDouble(    double value){
      if (DEBUG)       log("String_Node_Str" + value + "String_Node_Str");
      ((PrimitiveColumnIO)currentColumnIO).getColumnWriter().write(value,r[currentLevel],currentColumnIO.getDefinitionLevel());
      setRepetitionLevel();
      if (DEBUG)       printState();
    }
  }
;
}