Hello,

In v2.40, new helpers were introduced that can log various requests and responses.

One such helper, response_log() tries to jsonify a response instance (

The issue with this is it causes the response instance state to change. Called via https://github.com/psf/requests/blob/c65c780849563c891f35ffc98d3198b71011c012/src/requests/models.py#L965, we can retrieve content which causes _content_consumed to change to True, even though the JSON decode failed.

This means it isn't safe to call json() on the response and keep the response unchanged. I can see the argument that this is a bug in requests, but for the moment there is now a subtle side effect introduced just by attempting logging - the implicit assumption is response won't change. I can imagine a less than ideal option would be to copy the response before trying to json()?