boost::intrusive_ptr<ExpressionContext> expCtx =
        new ExpressionContext(opCtx,
                              request,
                              CollatorInterface::cloneCollator(viewDef.defaultCollator()),
                              // We can use a stub MongoProcessInterface because we are only parsing
                              // the Pipeline for validation here. We won't do anything with the
                              // pipeline that will require a real implementation.
                              std::make_shared<StubMongoProcessInterface>(),
                              std::move(resolvedNamespaces),
                              boost::none);

    // Save this to a variable to avoid reading the atomic variable multiple times.
    auto currentFCV = serverGlobalParams.featureCompatibility.getVersion();

    // If the feature compatibility version is not 4.2, and we are validating features as master,
    // ban the use of new agg features introduced in 4.2 to prevent them from being persisted in the
    // catalog.
    if (serverGlobalParams.validateFeaturesAsMaster.load() &&
        currentFCV != ServerGlobalParams::FeatureCompatibility::Version::kFullyUpgradedTo42) {
        expCtx->maxFeatureCompatibilityVersion = currentFCV;
    }
    auto pipelineStatus = Pipeline::parse(viewDef.pipeline(), std::move(expCtx));
    if (!pipelineStatus.isOK()) {
        return pipelineStatus.getStatus();
    }