Crashing when multiple upstream server has resolve param

[JakubOnderka]

Imagine this simple configuration:

upstream upstream {
    server example.org resolve;
    server example.com resolve;
    server example.org resolve;
}

When just first upstream contains resolve param, everything works fine. But when multiple upstream servers has resolve param, nginx worker process fail with error in log like this:

socket() failed (97: Address family not supported by protocol) while connecting to upstream, client: 127.0.0.1, server: localhost, request: "GET / HTTP/1.1", upstream: "https://J?./", host: "localhost"

followed by worker crash. I will try to debug