-autofree causing a double free error, expected?

[danawoodman]

With the following code and building + running with -autofree set, I'm getting this error:

module main

import net.http
import json

fn main() {
	api := API{
		base: 'https://jsonplaceholder.typicode.com'
	}
	comments := api.get_comments()
	for comment in comments {
		println('${comment.id} - ${comment.name}')
	}
}

struct API {
	base string
}

struct Comment {
	post_id int    [json: postId]
	id      int
	name    string
	email   string
	body    string
}

fn (api &API) get_comments() []Comment {
	url := api.base + '/comments'
	response := http.get(url) or { panic('crap') }
	if response.status_code == 200 {
		return json.decode([]Comment, response.body) or { panic('cannot decode') }
	} else {
		panic('Failed to fetch the website. Status code: ${response.status_code}')
	}
}

Build command: v -autofree ..

Is there something I'm doing wrong here that would trigger the double free runtime exception?

V version:

V 0.4.0 7492add

OS info: