Program: 157830
Project: 157830
Buggy source:
private void multiBlockerDamage(Player player,boolean first,Game game){
  Permanent attacker=game.getPermanent(attackers.get(0));
  if (attacker == null) {
    return;
  }
  boolean oldRuleDamage=(player.getId() == defendingPlayerId);
  int damage=getDamageValueFromPermanent(attacker,game);
  if (canDamage(attacker,first)) {
    Map<UUID,Integer> blockerPower=new HashMap<>();
    for (    UUID blockerId : blockerOrder) {
      Permanent blocker=game.getPermanent(blockerId);
      if (canDamage(blocker,first)) {
        if (blocker.getBlocking() == 1) {
          blockerPower.put(blockerId,getDamageValueFromPermanent(blocker,game));
        }
      }
    }
    Map<UUID,Integer> assigned=new HashMap<>();
    if (blocked) {
      boolean excessDamageToDefender=true;
      for (      UUID blockerId : blockerOrder) {
        Permanent blocker=game.getPermanent(blockerId);
        if (blocker != null) {
          int lethalDamage;
          if (attacker.getAbilities().containsKey(DeathtouchAbility.getInstance().getId())) {
            lethalDamage=1;
          }
 else {
            lethalDamage=Math.max(blocker.getToughness().getValue() - blocker.getDamage(),0);
          }
          if (lethalDamage >= damage) {
            if (!oldRuleDamage) {
              assigned.put(blockerId,damage);
              damage=0;
              break;
            }
 else             if (damage == 0) {
              break;
            }
          }
          int damageAssigned=0;
          if (!oldRuleDamage) {
            damageAssigned=player.getAmount(lethalDamage,damage,"String_Node_Str" + blocker.getName(),game);
          }
 else {
            damageAssigned=player.getAmount(0,damage,"String_Node_Str" + blocker.getName(),game);
            if (damageAssigned < lethalDamage) {
              excessDamageToDefender=false;
            }
          }
          assigned.put(blockerId,damageAssigned);
          damage-=damageAssigned;
        }
      }
      if (damage > 0 && hasTrample(attacker) && excessDamageToDefender) {
        defenderDamage(attacker,damage,game);
      }
 else       if (!blockerOrder.isEmpty()) {
        assigned.put(blockerOrder.get(0),assigned.get(blockerOrder.get(0)) + damage);
      }
    }
    for (    UUID blockerId : blockerOrder) {
      Integer power=blockerPower.get(blockerId);
      if (power != null) {
        Permanent blocker=game.getPermanent(blockerId);
        if (!assignsDefendingPlayerAndOrDefendingCreaturesDividedDamage(blocker,blocker.getControllerId(),first,game,false)) {
          attacker.markDamage(power,blockerId,game,true,true);
        }
      }
    }
    for (    Map.Entry<UUID,Integer> entry : assigned.entrySet()) {
      Permanent blocker=game.getPermanent(entry.getKey());
      blocker.markDamage(entry.getValue(),attacker.getId(),game,true,true);
    }
  }
 else {
    for (    UUID blockerId : blockerOrder) {
      Permanent blocker=game.getPermanent(blockerId);
      if (canDamage(blocker,first)) {
        if (!assignsDefendingPlayerAndOrDefendingCreaturesDividedDamage(blocker,blocker.getControllerId(),first,game,false)) {
          attacker.markDamage(getDamageValueFromPermanent(blocker,game),blocker.getId(),game,true,true);
        }
      }
    }
  }
}

Fixed version (ground truth):
private void multiBlockerDamage(Player player,boolean first,Game game){
  Permanent attacker=game.getPermanent(attackers.get(0));
  if (attacker == null) {
    return;
  }
  boolean oldRuleDamage=(player.getId() == defendingPlayerId);
  int damage=getDamageValueFromPermanent(attacker,game);
  if (canDamage(attacker,first)) {
    Map<UUID,Integer> blockerPower=new HashMap<>();
    for (    UUID blockerId : blockerOrder) {
      Permanent blocker=game.getPermanent(blockerId);
      if (canDamage(blocker,first)) {
        if (blocker.getBlocking() == 1) {
          blockerPower.put(blockerId,getDamageValueFromPermanent(blocker,game));
        }
      }
    }
    Map<UUID,Integer> assigned=new HashMap<>();
    if (blocked) {
      boolean excessDamageToDefender=true;
      for (      UUID blockerId : new ArrayList<>(blockerOrder)) {
        Permanent blocker=game.getPermanent(blockerId);
        if (blocker != null) {
          int lethalDamage;
          if (attacker.getAbilities().containsKey(DeathtouchAbility.getInstance().getId())) {
            lethalDamage=1;
          }
 else {
            lethalDamage=Math.max(blocker.getToughness().getValue() - blocker.getDamage(),0);
          }
          if (lethalDamage >= damage) {
            if (!oldRuleDamage) {
              assigned.put(blockerId,damage);
              damage=0;
              break;
            }
 else             if (damage == 0) {
              break;
            }
          }
          int damageAssigned=0;
          if (!oldRuleDamage) {
            damageAssigned=player.getAmount(lethalDamage,damage,"String_Node_Str" + blocker.getName(),game);
          }
 else {
            damageAssigned=player.getAmount(0,damage,"String_Node_Str" + blocker.getName(),game);
            if (damageAssigned < lethalDamage) {
              excessDamageToDefender=false;
            }
          }
          assigned.put(blockerId,damageAssigned);
          damage-=damageAssigned;
        }
      }
      if (damage > 0 && hasTrample(attacker) && excessDamageToDefender) {
        defenderDamage(attacker,damage,game);
      }
 else       if (!blockerOrder.isEmpty()) {
        assigned.put(blockerOrder.get(0),assigned.get(blockerOrder.get(0)) + damage);
      }
    }
    for (    UUID blockerId : blockerOrder) {
      Integer power=blockerPower.get(blockerId);
      if (power != null) {
        Permanent blocker=game.getPermanent(blockerId);
        if (!assignsDefendingPlayerAndOrDefendingCreaturesDividedDamage(blocker,blocker.getControllerId(),first,game,false)) {
          attacker.markDamage(power,blockerId,game,true,true);
        }
      }
    }
    for (    Map.Entry<UUID,Integer> entry : assigned.entrySet()) {
      Permanent blocker=game.getPermanent(entry.getKey());
      blocker.markDamage(entry.getValue(),attacker.getId(),game,true,true);
    }
  }
 else {
    for (    UUID blockerId : blockerOrder) {
      Permanent blocker=game.getPermanent(blockerId);
      if (canDamage(blocker,first)) {
        if (!assignsDefendingPlayerAndOrDefendingCreaturesDividedDamage(blocker,blocker.getControllerId(),first,game,false)) {
          attacker.markDamage(getDamageValueFromPermanent(blocker,game),blocker.getId(),game,true,true);
        }
      }
    }
  }
}