Program: 134288
Project: 134288
Buggy source:
public static List<List<int[]>> getValidPlacements(List<int[]> positions,World world,int x,int y,int z,int blockSide,ItemStack itemStack,EntityPlayer player,Block block){
  Block var11=world.getBlock(x,y,z);
  if (var11 == Blocks.snow_layer && (world.getBlockMetadata(x,y,z) & 7) < 1) {
    blockSide=1;
  }
 else   if (var11 != Blocks.vine && var11 != Blocks.tallgrass && var11 != Blocks.deadbush && !var11.isReplaceable(world,x,y,z)) {
    if (blockSide == 0) {
      --y;
    }
 else     if (blockSide == 1) {
      ++y;
    }
 else     if (blockSide == 2) {
      --z;
    }
 else     if (blockSide == 3) {
      ++z;
    }
 else     if (blockSide == 4) {
      --x;
    }
 else     if (blockSide == 5) {
      ++x;
    }
  }
  if (!player.canPlayerEdit(x,y,z,blockSide,itemStack)) {
    return new ArrayList<List<int[]>>();
  }
 else   if (y == world.getHeight() && block.getMaterial().isSolid()) {
    return new ArrayList<List<int[]>>();
  }
 else {
    int[] lengths=getLengths(positions);
    int[] min=getExtremeCoords(positions,true);
    ArrayList<List<int[]>> validPlacements=new ArrayList<List<int[]>>();
    for (int xShift=min[0] - lengths[0]; xShift <= min[0]; xShift++) {
      for (int yShift=min[0] - lengths[1]; yShift <= min[1]; yShift++) {
        for (int zShift=min[0] - lengths[2]; zShift <= min[2]; zShift++) {
          ArrayList<int[]> validPositions=new ArrayList<int[]>();
          for (          int[] position : positions) {
            validPositions.add(new int[]{position[0] + x + xShift,position[1] + y + yShift,position[2] + z + zShift});
          }
          if (canPlace(world,block,validPositions,null,itemStack)) {
            validPlacements.add(validPositions);
          }
        }
      }
    }
    return validPlacements;
  }
}

Fixed version (ground truth):
public static List<List<int[]>> getValidPlacements(List<int[]> positions,World world,int x,int y,int z,int blockSide,ItemStack itemStack,EntityPlayer player,Block block){
  Block var11=world.getBlock(x,y,z);
  if (var11 == Blocks.snow_layer && (world.getBlockMetadata(x,y,z) & 7) < 1) {
    blockSide=1;
  }
 else   if (var11 != Blocks.vine && var11 != Blocks.tallgrass && var11 != Blocks.deadbush && !var11.isReplaceable(world,x,y,z)) {
    if (blockSide == 0) {
      --y;
    }
 else     if (blockSide == 1) {
      ++y;
    }
 else     if (blockSide == 2) {
      --z;
    }
 else     if (blockSide == 3) {
      ++z;
    }
 else     if (blockSide == 4) {
      --x;
    }
 else     if (blockSide == 5) {
      ++x;
    }
  }
  if (!player.canPlayerEdit(x,y,z,blockSide,itemStack)) {
    return new ArrayList<>();
  }
 else   if (y == world.getHeight() && block.getMaterial().isSolid()) {
    return new ArrayList<>();
  }
 else {
    int[] lengths=getLengths(positions);
    int[] min=getExtremeCoords(positions,true);
    ArrayList<List<int[]>> validPlacements=new ArrayList<>();
    for (int xShift=min[0] - lengths[0]; xShift <= min[0]; xShift++) {
      for (int yShift=min[0] - lengths[1]; yShift <= min[1]; yShift++) {
        for (int zShift=min[0] - lengths[2]; zShift <= min[2]; zShift++) {
          ArrayList<int[]> validPositions=new ArrayList<>();
          for (          int[] position : positions) {
            validPositions.add(new int[]{position[0] + x + xShift,position[1] + y + yShift,position[2] + z + zShift});
          }
          if (canPlace(world,block,validPositions,null,itemStack)) {
            validPlacements.add(validPositions);
          }
        }
      }
    }
    return validPlacements;
  }
}