static IntPoint computeOffsetFromAbsolute(RenderLayer* layer)
{
    TransformState transformState(TransformState::ApplyTransformDirection, FloatPoint());
    layer->renderer()->mapLocalToContainer(0, transformState, ApplyContainerFlip);
    transformState.flatten();
    return roundedIntPoint(transformState.lastPlanarPoint());
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.