Program: 30646
Project: 30646
Buggy source:
public String getTermName(){
  TileEntity tile=iHost.getTileEntity();
  World w=tile.getWorldObj();
  String name=((ICustomNameObject)iHost).getCustomName();
  if (name != null)   return name;
  EnumSet<ForgeDirection> possibleDirections=iHost.getTargets();
  for (  ForgeDirection s : possibleDirections) {
    Vec3 from=Vec3.createVectorHelper((double)tile.xCoord + 0.5,(double)tile.yCoord + 0.5,(double)tile.zCoord + 0.5);
    from=from.addVector(s.offsetX * 0.501,s.offsetY * 0.501,s.offsetZ * 0.501);
    Vec3 to=from.addVector(s.offsetX,s.offsetY,s.offsetZ);
    Block blk=w.getBlock(tile.xCoord + s.offsetX,tile.yCoord + s.offsetY,tile.zCoord + s.offsetZ);
    MovingObjectPosition mop=w.rayTraceBlocks(from,to,true);
    TileEntity te=w.getTileEntity(tile.xCoord + s.offsetX,tile.yCoord + s.offsetY,tile.zCoord + s.offsetZ);
    if (te == null)     continue;
    if (te instanceof IInterfaceHost) {
      try {
        if (((IInterfaceHost)te).getInterfaceDuality().sameGrid(gridProxy.getGrid()))         continue;
      }
 catch (      GridAccessException e) {
        continue;
      }
    }
    Item item=Item.getItemFromBlock(blk);
    if (item == null) {
      return blk.getUnlocalizedName();
    }
    ItemStack what=new ItemStack(item,1,blk.getDamageValue(w,tile.xCoord + s.offsetX,tile.yCoord + s.offsetY,tile.zCoord + s.offsetZ));
    try {
      if (mop != null && !badBlocks.contains(blk)) {
        if (te instanceof ICraftingMachine || InventoryAdaptor.getAdaptor(te,s.getOpposite()) != null) {
          if (te instanceof IInventory && ((IInventory)te).getSizeInventory() == 0)           continue;
          if (te instanceof ISidedInventory && ((ISidedInventory)te).getAccessibleSlotsFromSide(s.getOpposite().ordinal()).length == 0)           continue;
          if (mop.blockX == te.xCoord && mop.blockY == te.yCoord && mop.blockZ == te.zCoord) {
            ItemStack g=blk.getPickBlock(mop,w,te.xCoord,te.yCoord,te.zCoord);
            if (g != null)             what=g;
          }
        }
      }
    }
 catch (    Throwable t) {
      badBlocks.add(blk);
    }
    if (what.getItem() != null)     return what.getUnlocalizedName();
  }
  return "String_Node_Str";
}

Fixed version (ground truth):
public String getTermName(){
  TileEntity tile=iHost.getTileEntity();
  World w=tile.getWorldObj();
  if (((ICustomNameObject)iHost).hasCustomName())   return ((ICustomNameObject)iHost).getCustomName();
  EnumSet<ForgeDirection> possibleDirections=iHost.getTargets();
  for (  ForgeDirection s : possibleDirections) {
    Vec3 from=Vec3.createVectorHelper((double)tile.xCoord + 0.5,(double)tile.yCoord + 0.5,(double)tile.zCoord + 0.5);
    from=from.addVector(s.offsetX * 0.501,s.offsetY * 0.501,s.offsetZ * 0.501);
    Vec3 to=from.addVector(s.offsetX,s.offsetY,s.offsetZ);
    Block blk=w.getBlock(tile.xCoord + s.offsetX,tile.yCoord + s.offsetY,tile.zCoord + s.offsetZ);
    MovingObjectPosition mop=w.rayTraceBlocks(from,to,true);
    TileEntity te=w.getTileEntity(tile.xCoord + s.offsetX,tile.yCoord + s.offsetY,tile.zCoord + s.offsetZ);
    if (te == null)     continue;
    if (te instanceof IInterfaceHost) {
      try {
        if (((IInterfaceHost)te).getInterfaceDuality().sameGrid(gridProxy.getGrid()))         continue;
      }
 catch (      GridAccessException e) {
        continue;
      }
    }
    Item item=Item.getItemFromBlock(blk);
    if (item == null) {
      return blk.getUnlocalizedName();
    }
    ItemStack what=new ItemStack(item,1,blk.getDamageValue(w,tile.xCoord + s.offsetX,tile.yCoord + s.offsetY,tile.zCoord + s.offsetZ));
    try {
      if (mop != null && !badBlocks.contains(blk)) {
        if (te instanceof ICraftingMachine || InventoryAdaptor.getAdaptor(te,s.getOpposite()) != null) {
          if (te instanceof IInventory && ((IInventory)te).getSizeInventory() == 0)           continue;
          if (te instanceof ISidedInventory && ((ISidedInventory)te).getAccessibleSlotsFromSide(s.getOpposite().ordinal()).length == 0)           continue;
          if (mop.blockX == te.xCoord && mop.blockY == te.yCoord && mop.blockZ == te.zCoord) {
            ItemStack g=blk.getPickBlock(mop,w,te.xCoord,te.yCoord,te.zCoord);
            if (g != null)             what=g;
          }
        }
      }
    }
 catch (    Throwable t) {
      badBlocks.add(blk);
    }
    if (what.getItem() != null)     return what.getUnlocalizedName();
  }
  return "String_Node_Str";
}