Program: 159566
Project: 159566
Buggy source:
public Mana needed(Mana avail){
  Mana compare=avail.copy();
  compare.subtract(this);
  if (compare.getRed() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getRed()));
    compare.setAny(compare.getAny() - diff);
    compare.setRed(compare.getRed() + diff);
  }
  if (compare.getGreen() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getGreen()));
    compare.setAny(compare.getAny() - diff);
    compare.setGreen(compare.getGreen() + diff);
  }
  if (compare.getBlue() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getBlue()));
    compare.setAny(compare.getAny() - diff);
    compare.setBlue(compare.getBlue() + diff);
  }
  if (compare.getBlack() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getBlack()));
    compare.setAny(compare.getAny() - diff);
    compare.setBlack(compare.getBlack() + diff);
  }
  if (compare.getWhite() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getWhite()));
    compare.setAny(compare.getAny() - diff);
    compare.setWhite(compare.getWhite() + diff);
  }
  if (compare.getColorless() < 0) {
    int remaining=0;
    remaining+=Math.min(0,compare.getRed());
    remaining+=Math.min(0,compare.getWhite());
    remaining+=Math.min(0,compare.getGreen());
    remaining+=Math.min(0,compare.getBlack());
    remaining+=Math.min(0,compare.getBlue());
    remaining+=Math.min(0,compare.getAny());
    if (remaining > 0) {
      int diff=Math.min(remaining,Math.abs(compare.getColorless()));
      compare.setColorless(compare.getColorless() + diff);
    }
  }
  Mana needed=new Mana();
  if (compare.getRed() < 0)   needed.setRed(Math.abs(compare.getRed()));
  if (compare.getWhite() < 0)   needed.setWhite(Math.abs(compare.getWhite()));
  if (compare.getGreen() < 0)   needed.setGreen(Math.abs(compare.getGreen()));
  if (compare.getBlack() < 0)   needed.setBlack(Math.abs(compare.getBlack()));
  if (compare.getBlue() < 0)   needed.setBlue(Math.abs(compare.getBlue()));
  if (compare.getColorless() < 0)   needed.setColorless(Math.abs(compare.getColorless()));
  return needed;
}

Fixed version (ground truth):
public Mana needed(Mana avail){
  Mana compare=avail.copy();
  compare.subtract(this);
  if (compare.getRed() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getRed()));
    compare.setAny(compare.getAny() - diff);
    compare.setRed(compare.getRed() + diff);
  }
  if (compare.getGreen() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getGreen()));
    compare.setAny(compare.getAny() - diff);
    compare.setGreen(compare.getGreen() + diff);
  }
  if (compare.getBlue() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getBlue()));
    compare.setAny(compare.getAny() - diff);
    compare.setBlue(compare.getBlue() + diff);
  }
  if (compare.getBlack() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getBlack()));
    compare.setAny(compare.getAny() - diff);
    compare.setBlack(compare.getBlack() + diff);
  }
  if (compare.getWhite() < 0 && compare.getAny() > 0) {
    int diff=Math.min(compare.getAny(),Math.abs(compare.getWhite()));
    compare.setAny(compare.getAny() - diff);
    compare.setWhite(compare.getWhite() + diff);
  }
  if (compare.getColorless() < 0) {
    int remaining=0;
    remaining+=Math.min(0,compare.getRed());
    remaining+=Math.min(0,compare.getWhite());
    remaining+=Math.min(0,compare.getGreen());
    remaining+=Math.min(0,compare.getBlack());
    remaining+=Math.min(0,compare.getBlue());
    remaining+=Math.min(0,compare.getAny());
    if (remaining > 0) {
      int diff=Math.min(remaining,Math.abs(compare.getColorless()));
      compare.setColorless(compare.getColorless() + diff);
    }
  }
  Mana needed=new Mana();
  if (compare.getRed() < 0) {
    needed.setRed(Math.abs(compare.getRed()));
  }
  if (compare.getWhite() < 0) {
    needed.setWhite(Math.abs(compare.getWhite()));
  }
  if (compare.getGreen() < 0) {
    needed.setGreen(Math.abs(compare.getGreen()));
  }
  if (compare.getBlack() < 0) {
    needed.setBlack(Math.abs(compare.getBlack()));
  }
  if (compare.getBlue() < 0) {
    needed.setBlue(Math.abs(compare.getBlue()));
  }
  if (compare.getColorless() < 0) {
    needed.setColorless(Math.abs(compare.getColorless()));
  }
  return needed;
}