Suspicious crash in release mode.

[vi]

Program:

use nfqueue::{Queue, Verdict, Message};

fn callback(msg: &Message, d:&mut ()) {
    println!(" -> msg: {}", msg);

    msg.set_verdict(nfqueue::Verdict::Accept);
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut q = Queue::new(());

    q.open();

    q.create_queue(44, callback);
    q.set_mode(nfqueue::CopyMode::CopyMeta, 0xffff);
    //q.set_queuelen(1024); // linking fails with this

    q.run_loop();
    q.close();

    Ok(())
}

Seems to be working in debug. But in release mode, it crashes:

#0  0x0000555555564850 in <nfqueue::message::Message as core::fmt::Display>::fmt ()
#1  0x00005555555840dc in core::fmt::write () at src/libcore/fmt/mod.rs:1028
#2  0x0000555555568981 in std::io::Write::write_fmt () at src/libstd/io/mod.rs:1412
#3  <std::io::stdio::Stdout as std::io::Write>::write_fmt () at src/libstd/io/stdio.rs:533
#4  0x00005555555691da in std::io::stdio::print_to::{{closure}} () at src/libstd/io/stdio.rs:786
#5  std::thread::local::LocalKey<T>::try_with () at src/libstd/thread/local.rs:262
#6  std::io::stdio::print_to () at src/libstd/io/stdio.rs:780
#7  std::io::stdio::_print () at src/libstd/io/stdio.rs:802
#8  0x00005555555644d8 in nfqnetsim::callback ()
#9  0x0000555555564249 in nfqueue::real_callback ()
#10 0x00007ffff7f5c3e9 in ?? () from /usr/lib/x86_64-linux-gnu/libnetfilter_queue.so.1
#11 0x00007ffff7b5573f in nfnl_handle_packet () from /usr/lib/x86_64-linux-gnu/libnfnetlink.so.0
#12 0x000055555556438f in nfqueue::Queue<T>::run_loop ()
#13 0x000055555556453b in nfqnetsim::main ()
#14 0x00005555555641f3 in std::rt::lang_start::{{closure}} ()
#15 0x000055555556dc93 in std::rt::lang_start_internal::{{closure}} () at src/libstd/rt.rs:48
#16 std::panicking::try::do_call () at src/libstd/panicking.rs:287
#17 0x000055555556f46a in __rust_maybe_catch_panic () at src/libpanic_unwind/lib.rs:78
#18 0x000055555556e6fd in std::panicking::try () at src/libstd/panicking.rs:265
#19 std::panic::catch_unwind () at src/libstd/panic.rs:396
#20 std::rt::lang_start_internal () at src/libstd/rt.rs:47
#21 0x0000555555564562 in main ()

Built with rustc 1.40.0-nightly (2477e2493 2019-11-04) and libnetfilter-queue-dev=1.0.3-1