void HTMLFormElement::copyNonAttributePropertiesFromElement(const Element& source)
{
    m_wasDemoted = static_cast<const HTMLFormElement&>(source).m_wasDemoted;
    HTMLElement::copyNonAttributePropertiesFromElement(source);
}

This vulnerability category highlights issues in resource management where failures to properly release memory, file handles, or other resources can degrade system performance or enable denial-of-service conditions.