Program: 133998
Project: 133998
Buggy source:
public static boolean softenLanding(Player player){
  Block block=player.getLocation().getBlock().getRelative(BlockFace.DOWN);
  if (EarthMethods.canMetalbend(player) && EarthMethods.isMetalBlock(block)) {
    return true;
  }
  if (EarthMethods.isEarthbendable(player,block) || EarthMethods.isTransparentToEarthbending(player,block)) {
    if (!EarthMethods.isTransparentToEarthbending(player,block)) {
      MaterialData type=block.getState().getData();
      if (GeneralMethods.isSolid(block.getRelative(BlockFace.DOWN))) {
        if (type.getItemType() == Material.RED_SANDSTONE) {
          byte data=(byte)0x1;
          block.setType(Material.SAND);
          block.setData(data);
        }
 else {
          block.setType(Material.SAND);
        }
        if (!sandblocks.containsKey(block)) {
          sandidentities.put(block,type);
          sandblocks.put(block,System.currentTimeMillis());
        }
      }
    }
    for (    Block affectedBlock : GeneralMethods.getBlocksAroundPoint(block.getLocation(),2)) {
      if (EarthMethods.isEarthbendable(player,affectedBlock)) {
        if (GeneralMethods.isSolid(affectedBlock.getRelative(BlockFace.DOWN))) {
          MaterialData type=affectedBlock.getState().getData();
          if (type.getItemType() == Material.RED_SANDSTONE) {
            byte data=(byte)0x1;
            affectedBlock.setType(Material.SAND);
            affectedBlock.setData(data);
          }
 else {
            affectedBlock.setType(Material.SAND);
          }
          if (!sandblocks.containsKey(affectedBlock)) {
            sandidentities.putIfAbsent(affectedBlock,type);
            sandblocks.put(affectedBlock,System.currentTimeMillis());
          }
        }
      }
    }
    return true;
  }
  if (EarthMethods.isEarthbendable(player,block) || EarthMethods.isTransparentToEarthbending(player,block)) {
    return true;
  }
  return false;
}

Fixed version (ground truth):
@SuppressWarnings("String_Node_Str") public static boolean softenLanding(Player player){
  Block block=player.getLocation().getBlock().getRelative(BlockFace.DOWN);
  if (EarthMethods.canMetalbend(player) && EarthMethods.isMetalBlock(block)) {
    return true;
  }
  if (EarthMethods.isEarthbendable(player,block) || EarthMethods.isTransparentToEarthbending(player,block)) {
    if (!EarthMethods.isTransparentToEarthbending(player,block)) {
      MaterialData type=block.getState().getData();
      if (GeneralMethods.isSolid(block.getRelative(BlockFace.DOWN))) {
        if (type.getItemType() == Material.RED_SANDSTONE) {
          byte data=(byte)0x1;
          block.setType(Material.SAND);
          block.setData(data);
        }
 else {
          block.setType(Material.SAND);
        }
        if (!sandblocks.containsKey(block)) {
          sandidentities.put(block,type);
          sandblocks.put(block,System.currentTimeMillis());
        }
      }
    }
    for (    Block affectedBlock : GeneralMethods.getBlocksAroundPoint(block.getLocation(),2)) {
      if (EarthMethods.isEarthbendable(player,affectedBlock)) {
        if (GeneralMethods.isSolid(affectedBlock.getRelative(BlockFace.DOWN))) {
          MaterialData type=affectedBlock.getState().getData();
          if (type.getItemType() == Material.RED_SANDSTONE) {
            byte data=(byte)0x1;
            affectedBlock.setType(Material.SAND);
            affectedBlock.setData(data);
          }
 else {
            affectedBlock.setType(Material.SAND);
          }
          if (!sandblocks.containsKey(affectedBlock)) {
            sandidentities.putIfAbsent(affectedBlock,type);
            sandblocks.put(affectedBlock,System.currentTimeMillis());
          }
        }
      }
    }
    return true;
  }
  if (EarthMethods.isEarthbendable(player,block) || EarthMethods.isTransparentToEarthbending(player,block)) {
    return true;
  }
  return false;
}