got: Why this "The `body`, `json` and `form` options are mutually exclusive" error?

What would you like to discuss?

I am upgrading my (functional) code from the latest got@10.x.X to got@11.0.1.

Went through the release notes, updated GotError and .pagination… Typescript compiles ok but code breaks.

Not really sure why but I failed at catching any exception occurring within got so I resorted to vscode debugger.

The first got call fails with this sequence sequence:

1. call got to query for some CRM data as json

• GET method
• a json payload defining the filter
• allowGetBody: true
• an afterResponse hook to acquire/refresh oauth token (using got with a POST method with a json payload)

1. since there is no initial oauth token, the afterResponse hook is executed:

    afterResponse: [
      async (response, retryWithMergedOptions) => {
        // Unauthorized
        if (response.statusCode === 401) {
          const updatedOptions: ExtendOptions = { headers: { 'oauth-token': await getNewAuthToken() } };

          // Save for further requests
          authenticatedInstance.defaults.options = got.mergeOptions(
            authenticatedInstance.defaults.options,
            updatedOptions
          );

          return retryWithMergedOptions(updatedOptions);
        }

        // No changes otherwise
        return response;
      },
    ],

The oauth token is correctly acquired/renewed, object updatedOptions is correct but retryWithMergedOptions(updatedOptions) fails with throw new TypeError('The body, jsonandform options are mutually exclusive') At this point of _finalizeBody(), this.option holds my json filter in both body and json property.

I am unsure if I originally made a mistake somewhere in the past and must feel lucky my code works in got@10.x.x or if I happen to hit e regression.

Please advise.

Checklist

• I have read the documentation.