@octokit/plugin-retry/dist-src/error-request.js

// @ts-ignore
export async function errorRequest(octokit, state, error, options) {
    if (!error.request || !error.request.request) {
        // address https://github.com/octokit/plugin-retry.js/issues/8
        throw error;
    }
    // retry all >= 400 && not doNotRetry
    if (error.status >= 400 && !state.doNotRetry.includes(error.status)) {
        const retries = options.request.retries != null ? options.request.retries : state.retries;
        const retryAfter = Math.pow((options.request.retryCount || 0) + 1, 2);
        throw octokit.retry.retryRequest(error, retries, retryAfter);
    }
    // Maybe eventually there will be more cases here
    throw error;
}