Program: 22800
Project: 22800
Buggy source:
@Override public void fillPackage(CarriagePackage Package) throws CarriageMotionException {
  Directions SupportDirection=null;
  for (  Directions Direction : Directions.values()) {
    if (!SideClosed[Direction.ordinal()]) {
      SupportDirection=Direction;
      break;
    }
  }
  if (SupportDirection == null) {
    return;
  }
  BlockRecordSet ValidColumns=new BlockRecordSet();
  int ValidColumnCheckFactorX=(SupportDirection.deltaX == 0) ? (1) : (0);
  int ValidColumnCheckFactorY=(SupportDirection.deltaY == 0) ? (1) : (0);
  int ValidColumnCheckFactorZ=(SupportDirection.deltaZ == 0) ? (1) : (0);
  BlockRecordSet BlocksChecked=new BlockRecordSet();
  BlockRecordSet CarriagesToCheck=new BlockRecordSet();
  BlockRecordSet BlocksToCheck=new BlockRecordSet();
  BlocksChecked.add(Package.AnchorRecord);
  Package.AddBlock(Package.AnchorRecord);
  CarriagesToCheck.add(Package.AnchorRecord);
  int BlocksCarried=0;
  boolean terminatedByReversal=false;
  while (CarriagesToCheck.size() > 0) {
    BlockRecord CarriageRecord=CarriagesToCheck.pollFirst();
    if (((TileEntitySupportCarriage)CarriageRecord.entity).SideClosed[SupportDirection.ordinal()]) {
      throw (new CarriageMotionException("String_Node_Str"));
    }
    ValidColumns.add(new BlockRecord(CarriageRecord.X * ValidColumnCheckFactorX,CarriageRecord.Y * ValidColumnCheckFactorY,CarriageRecord.Z * ValidColumnCheckFactorZ));
    if (Package.MotionDirection == SupportDirection.opposite()) {
      Package.AddPotentialObstruction(CarriageRecord.NextInDirection(Package.MotionDirection));
    }
    for (    Directions TargetDirection : Directions.values()) {
      if (TargetDirection == SupportDirection.opposite()) {
        continue;
      }
      BlockRecord TargetRecord=CarriageRecord.NextInDirection(TargetDirection);
      if (!BlocksChecked.add(TargetRecord)) {
        continue;
      }
      if (worldObj.isAirBlock(TargetRecord.X,TargetRecord.Y,TargetRecord.Z)) {
        continue;
      }
      TargetRecord.Identify(worldObj);
      if (TargetDirection == SupportDirection && !terminatedByReversal) {
        Package.AddBlock(TargetRecord);
        BlocksToCheck.add(TargetRecord);
        BlocksCarried++;
        if (BlocksCarried > RiMConfiguration.Carriage.MaxSupportBurden) {
          FailBecauseOverburdened();
        }
        if (TargetRecord.entity != null && TargetRecord.entity instanceof TileEntitySupportCarriage) {
          if (((TileEntityPlatformCarriage)TargetRecord.entity).treatSideAsClosed(SupportDirection.oppositeOrdinal)) {
            terminatedByReversal=true;
          }
        }
        continue;
      }
      if (Package.MatchesCarriageType(TargetRecord)) {
        Package.AddBlock(TargetRecord);
        CarriagesToCheck.add(TargetRecord);
        continue;
      }
      if (TargetDirection == Package.MotionDirection) {
        Package.AddPotentialObstruction(TargetRecord);
      }
    }
  }
  terminatedByReversal=false;
  while (BlocksToCheck.size() > 0) {
    BlockRecord BlockRecord=BlocksToCheck.pollFirst();
    for (    Directions TargetDirection : Directions.values()) {
      BlockRecord TargetRecord=BlockRecord.NextInDirection(TargetDirection);
{
        BlockRecord TargetRecordCheck=new BlockRecord(TargetRecord.X * ValidColumnCheckFactorX,TargetRecord.Y * ValidColumnCheckFactorY,TargetRecord.Z * ValidColumnCheckFactorZ);
        if (!ValidColumns.contains(TargetRecordCheck)) {
          if (TargetDirection == Package.MotionDirection) {
            Package.AddPotentialObstruction(TargetRecord);
          }
          continue;
        }
      }
      if (!BlocksChecked.add(TargetRecord)) {
        continue;
      }
      if (worldObj.isAirBlock(TargetRecord.X,TargetRecord.Y,TargetRecord.Z)) {
        continue;
      }
      TargetRecord.Identify(worldObj);
      if (SupportDirection == TargetDirection && terminatedByReversal)       continue;
      if (TargetRecord.entity != null && TargetRecord.entity instanceof TileEntitySupportCarriage) {
        if (!((TileEntityCarriage)TargetRecord.entity).treatSideAsClosed(SupportDirection.oppositeOrdinal)) {
          terminatedByReversal=true;
        }
      }
      Package.AddBlock(TargetRecord);
      BlocksToCheck.add(TargetRecord);
      BlocksCarried++;
      if (BlocksCarried > RiMConfiguration.Carriage.MaxSupportBurden) {
        FailBecauseOverburdened();
      }
    }
  }
}

Fixed version (ground truth):
@Override public void fillPackage(CarriagePackage Package) throws CarriageMotionException {
  Directions SupportDirection=null;
  for (  Directions Direction : Directions.values()) {
    if (!SideClosed[Direction.ordinal()]) {
      SupportDirection=Direction;
      break;
    }
  }
  if (SupportDirection == null) {
    return;
  }
  BlockRecordSet ValidColumns=new BlockRecordSet();
  int ValidColumnCheckFactorX=(SupportDirection.deltaX == 0) ? (1) : (0);
  int ValidColumnCheckFactorY=(SupportDirection.deltaY == 0) ? (1) : (0);
  int ValidColumnCheckFactorZ=(SupportDirection.deltaZ == 0) ? (1) : (0);
  BlockRecordSet BlocksChecked=new BlockRecordSet();
  BlockRecordSet CarriagesToCheck=new BlockRecordSet();
  BlockRecordSet BlocksToCheck=new BlockRecordSet();
  BlocksChecked.add(Package.AnchorRecord);
  Package.AddBlock(Package.AnchorRecord);
  CarriagesToCheck.add(Package.AnchorRecord);
  int BlocksCarried=0;
  boolean terminatedByReversal=false;
  while (CarriagesToCheck.size() > 0) {
    BlockRecord CarriageRecord=CarriagesToCheck.pollFirst();
    if (((TileEntitySupportCarriage)CarriageRecord.entity).SideClosed[SupportDirection.ordinal()]) {
      throw (new CarriageMotionException("String_Node_Str"));
    }
    ValidColumns.add(new BlockRecord(CarriageRecord.X * ValidColumnCheckFactorX,CarriageRecord.Y * ValidColumnCheckFactorY,CarriageRecord.Z * ValidColumnCheckFactorZ));
    if (Package.MotionDirection == SupportDirection.opposite()) {
      Package.AddPotentialObstruction(CarriageRecord.NextInDirection(Package.MotionDirection));
    }
    for (    Directions TargetDirection : Directions.values()) {
      if (TargetDirection == SupportDirection.opposite()) {
        continue;
      }
      BlockRecord TargetRecord=CarriageRecord.NextInDirection(TargetDirection);
      if (!BlocksChecked.add(TargetRecord)) {
        continue;
      }
      if (worldObj.isAirBlock(TargetRecord.X,TargetRecord.Y,TargetRecord.Z)) {
        continue;
      }
      TargetRecord.Identify(worldObj);
      if (TargetDirection == SupportDirection && !terminatedByReversal) {
        Package.AddBlock(TargetRecord);
        BlocksToCheck.add(TargetRecord);
        BlocksCarried++;
        if (BlocksCarried > RiMConfiguration.Carriage.MaxSupportBurden) {
          FailBecauseOverburdened();
        }
        if (TargetRecord.entity != null && TargetRecord.entity instanceof TileEntitySupportCarriage) {
          if (((TileEntityCarriage)TargetRecord.entity).treatSideAsClosed(SupportDirection.oppositeOrdinal)) {
            terminatedByReversal=true;
          }
        }
        continue;
      }
      if (Package.MatchesCarriageType(TargetRecord)) {
        Package.AddBlock(TargetRecord);
        CarriagesToCheck.add(TargetRecord);
        continue;
      }
      if (TargetDirection == Package.MotionDirection) {
        Package.AddPotentialObstruction(TargetRecord);
      }
    }
  }
  terminatedByReversal=false;
  while (BlocksToCheck.size() > 0) {
    BlockRecord BlockRecord=BlocksToCheck.pollFirst();
    for (    Directions TargetDirection : Directions.values()) {
      BlockRecord TargetRecord=BlockRecord.NextInDirection(TargetDirection);
{
        BlockRecord TargetRecordCheck=new BlockRecord(TargetRecord.X * ValidColumnCheckFactorX,TargetRecord.Y * ValidColumnCheckFactorY,TargetRecord.Z * ValidColumnCheckFactorZ);
        if (!ValidColumns.contains(TargetRecordCheck)) {
          if (TargetDirection == Package.MotionDirection) {
            Package.AddPotentialObstruction(TargetRecord);
          }
          continue;
        }
      }
      if (!BlocksChecked.add(TargetRecord)) {
        continue;
      }
      if (worldObj.isAirBlock(TargetRecord.X,TargetRecord.Y,TargetRecord.Z)) {
        continue;
      }
      TargetRecord.Identify(worldObj);
      if (SupportDirection == TargetDirection && terminatedByReversal)       continue;
      if (TargetRecord.entity != null && TargetRecord.entity instanceof TileEntitySupportCarriage) {
        if (!((TileEntityCarriage)TargetRecord.entity).treatSideAsClosed(SupportDirection.oppositeOrdinal)) {
          terminatedByReversal=true;
        }
      }
      Package.AddBlock(TargetRecord);
      BlocksToCheck.add(TargetRecord);
      BlocksCarried++;
      if (BlocksCarried > RiMConfiguration.Carriage.MaxSupportBurden) {
        FailBecauseOverburdened();
      }
    }
  }
}