Program: 32703
Project: 32703
Buggy source:
/** 
 * Sets the most recently viewed element to WHITE and returns the white-centric index of the element after the set is complete.
 */
public int setWhite(){
  if (localIndex == -1) {
    throw new NoSuchElementException("String_Node_Str");
  }
 else   if (currentNode == null || getIndex() >= barcode.treeSize() || localIndex < currentNode.whiteSpace) {
    return getWhiteIndex();
  }
 else   if (getIndex() != barcode.treeSize() - 1) {
    if (currentNode.rootSize == 1) {
      BarcodeNode affectedNode=currentNode;
      findNextNode();
      affectedNode.setWhite(getIndex(),localIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      if (currentNode.whiteSpace == 0 && currentNode.rootSize == 0)       currentNode=affectedNode;
      return whiteSoFar + localIndex;
    }
 else     if (localIndex == currentNode.whiteSpace) {
      currentNode.setWhite(getIndex(),localIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      return whiteSoFar + localIndex;
    }
 else {
      currentNode.setWhite(getIndex(),localIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      blackSoFar+=currentNode.rootSize;
      whiteSoFar+=currentNode.whiteSpace;
      findNextNode();
      localIndex=0;
      return whiteSoFar;
    }
  }
 else   if (currentNode.rootSize == 1) {
    BarcodeNode affectedNode=currentNode;
    if (currentNode.whiteSpace + 1 == barcode.treeSize()) {
      currentNode=null;
      affectedNode.setWhite(getIndex(),localIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      return localIndex;
    }
 else {
      findPreviousNode();
      int currentLocalIndex=localIndex;
      blackSoFar-=currentNode.rootSize;
      whiteSoFar-=currentNode.whiteSpace;
      localIndex+=currentNode.whiteSpace + currentNode.rootSize;
      affectedNode.setWhite(getIndex(),currentLocalIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      if (currentNode.whiteSpace == 0 && currentNode.rootSize == 0)       currentNode=affectedNode;
      return whiteSoFar + currentNode.whiteSpace;
    }
  }
 else {
    currentNode.setWhite(getIndex(),localIndex,1);
    if (barcode.getRootNode() != null)     barcode.treeSizeChanged();
    return whiteSoFar + localIndex - currentNode.rootSize;
  }
}

Fixed version (ground truth):
/** 
 * Sets the most recently viewed element to WHITE and returns the white-centric index of the element after the set is complete.
 */
public int setWhite(){
  if (localIndex == -1) {
    throw new NoSuchElementException("String_Node_Str");
  }
 else   if (currentNode == null || getIndex() >= barcode.treeSize() || localIndex < currentNode.whiteSpace) {
    return getWhiteIndex();
  }
 else   if (getIndex() != barcode.treeSize() - 1) {
    if (currentNode.rootSize == 1) {
      BarcodeNode affectedNode=currentNode;
      findNextNode();
      affectedNode.setWhite(getIndex(),localIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      if (currentNode.whiteSpace == 0 && currentNode.rootSize == 0)       currentNode=affectedNode;
      return whiteSoFar + localIndex;
    }
 else     if (localIndex == currentNode.whiteSpace) {
      currentNode.setWhite(getIndex(),localIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      return whiteSoFar + localIndex;
    }
 else {
      currentNode.setWhite(getIndex(),localIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      blackSoFar+=currentNode.rootSize;
      whiteSoFar+=currentNode.whiteSpace;
      findNextNode();
      localIndex=0;
      return whiteSoFar;
    }
  }
 else   if (currentNode.rootSize == 1) {
    BarcodeNode affectedNode=currentNode;
    if (currentNode.whiteSpace + 1 == barcode.treeSize()) {
      currentNode=null;
      affectedNode.setWhite(getIndex(),localIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      return localIndex;
    }
 else {
      findPreviousNode();
      int currentLocalIndex=localIndex;
      blackSoFar-=currentNode.rootSize;
      whiteSoFar-=currentNode.whiteSpace;
      localIndex+=currentNode.whiteSpace + currentNode.rootSize;
      affectedNode.setWhite(getIndex(),currentLocalIndex,1);
      if (barcode.getRootNode() != null)       barcode.treeSizeChanged();
      if (currentNode.whiteSpace == 0 && currentNode.rootSize == 0)       currentNode=affectedNode;
      return whiteSoFar + localIndex - currentNode.rootSize;
    }
  }
 else {
    currentNode.setWhite(getIndex(),localIndex,1);
    if (barcode.getRootNode() != null)     barcode.treeSizeChanged();
    return whiteSoFar + localIndex - currentNode.rootSize;
  }
}