[Demonstration 1]

[Buggy Method]
private void setTime(ItemStack stack, int amount) {
    init(stack);
    stack.getTagCompound().setLong(TAG_TIME, amount);
}

[Buggy Hunk]
stack.getTagCompound().setLong(TAG_TIME, amount);

[Patch]
stack.getTagCompound().setInteger(TAG_TIME, amount);

[Demonstration 2]

[Buggy Method]
@Override
public ItemStack getContainerItem(ItemStack stack) {
    if (hasContainerItem(stack)) {
        NBTTagCompound tagCompound = new NBTTagCompound();
        tagCompound.setInteger("Energy", stack.getTagCompound().getInteger("Energy"));
        ItemStack container = new ItemStack(getContainerItem());
        container.setTagCompound(tagCompound);
        return container;
    }
    return null;
}

[Buggy Hunk]
if (hasContainerItem(stack)) {

[Patch]
if (hasContainerItem(stack) && stack.hasTagCompound()) {

[Demonstration 3]

[Buggy Method]
@Override
public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Rectangle bounds = g.getClipBounds();
    if (cell.isLocked()) {
        g.setColor(Color.RED);
    } else {
        if (isFocusOwner()) {
            g.setColor(Color.BLUE);
        } else {
            g.setColor(Color.BLACK);
        }
    }
    g.drawOval(0, 0, bounds.width, bounds.height);
    g.setColor(getForeground());
    if (cell.isAlphabetical()) {
        String value = cell.value();
        centerText(g, value);
    } else if (cell.isPeg()) {
        g.fillOval(10, 10, bounds.width - 20, bounds.height - 20);
    } else if (cell.isBlank()) {
        g.setColor(getBackground());
        g.fillOval(2, 2, bounds.width - 4, bounds.height - 4);
    }
}

[Buggy Hunk]
Rectangle bounds = g.getClipBounds();

[Patch]
Rectangle bounds = getBounds();