Expected struct HitsTotal (pre-release)

[brigand]

This seems closely related to #377 but opening a new issues as that one is closed.

Getting "expected struct HitsTotal" issue with this on elasticsearch 6.7 (and the following versions for both elastic and elastic_derive crates).

• 0.21.0-pre.2 ☑️ Good
• 0.21.0-pre.3 ☑️ Good
• 0.21.0-pre.4 ☑️ Good
• 0.21.0-pre.5 ❌ Regression

(Parse(ParseError { inner: Error(\"invalid type: integer `0`, expected struct HitsTotal\", line: 11, column: 16) }))

Relevant code

#[derive(Clone, Debug, Serialize, Deserialize, ElasticType)]
pub struct PortfolioIdListing {
    pub id: String,
    pub idlisting: types::IdListing,
}

let response = esc
    .search::<es_models::PortfolioIdListing>()
    .index(EsIndex::Portfolio.name())
    .body(json!({
        "query": {
            "bool": {
                "must": {
                        // -1 is what the JS import script sets them to by default
                    "term": { "pf_likes": -1 },
                },
                "must_not": {
                    "terms": { "idlisting": exclude },
                },
            }
        },
        "size": Value::Number(BATCH_SIZE.into()),
        "_source": ["id", "idlisting"]
    }))
    .send()