Tutorial 2 on macOS doesn't appear to do anything

Created by: kornelski

cargo run --bin basic-tutorial-2

Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs
Running `/www/gstreamer-rs/target/debug/basic-tutorial-2`

and it stays like that. I don't see any output, files, windows or any side effects of it running.