Using messages beyond lifetime of consumer hangs thread about rust-rdkafka

[fede1024]

Thanks for reporting the issue! This is probably because the correct termination sequence for librdkafka requires to destroy the messages before the consumer or the client are destroyed. This ordering is not currently enforced in rust rdkafka.

The right approach here is probably to have the lifetime of messages bound to the one of the consumer. I hope it won't make the API much more complicated.

[fede1024]

Each Message now hold a (phantom) reference to the consumer who created it. Your example won't compile anymore.