Note that you only get a stacktrace if you set the environment variable `RUST_BACKTRACE=1`. Otherwise, you get a standard panic message. The message from `unwra

Note that you only get a stacktrace if you set the environment variable `RUST_BACKTRACE=1`. Otherwise, you get a standard panic message. The message from `unwrap` is probably unhelpful, which is why a lot of folks advocate using `expect`.