Continuous memory growth when the source of Loader 3D{} continues to change

QRhiShaderResourceBindings *QSSGRhiContext::srb(const QSSGRhiShaderResourceBindingList &bindings)
{
    auto it = m_srbCache.constFind(bindings);
    if (it != m_srbCache.constEnd())
        return *it;

    QRhiShaderResourceBindings *srb = m_rhi->newShaderResourceBindings();
    srb->setBindings(bindings.v, bindings.v + bindings.p);
    if (srb->create()) {
        m_srbCache.insert(bindings, srb);
    } else {
        qWarning("Failed to build srb");
        delete srb;
        srb = nullptr;
    }
    return srb;
}