[INFO] cloning repository https://github.com/breed/punnel
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/breed/punnel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbreed%2Fpunnel"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbreed%2Fpunnel'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 47dd7c90b93629ca61d041d753111bd24c1d60cc
[INFO] checking breed/punnel against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbreed%2Fpunnel" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/breed/punnel on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/breed/punnel
[INFO] finished tweaking git repo https://github.com/breed/punnel
[INFO] tweaked toml for git repo https://github.com/breed/punnel written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/breed/punnel already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 150bbcb32bb12ff7a21f8b3065bfd9da0453a5fb9e22d22d46a19da8c6ae9c28
[INFO] running `"docker" "start" "-a" "150bbcb32bb12ff7a21f8b3065bfd9da0453a5fb9e22d22d46a19da8c6ae9c28"`
[INFO] [stderr]     Checking net2 v0.2.26
[INFO] [stderr]     Checking futures v0.1.7
[INFO] [stderr]     Checking mio v0.6.2
[INFO] [stderr]     Checking tokio-core v0.1.3
[INFO] [stderr]     Checking punnel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Shutdown`
[INFO] [stderr]   --> src/main.rs:11:52
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::net::{Ipv6Addr, SocketAddr, SocketAddrV6, Shutdown};
[INFO] [stderr]    |                                                    ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Codec`, `Framed`
[INFO] [stderr]   --> src/main.rs:13:26
[INFO] [stderr]    |
[INFO] [stderr] 13 | use tokio_core::io::{Io, Codec, Framed};
[INFO] [stderr]    |                          ^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:21:33
[INFO] [stderr]    |
[INFO] [stderr] 21 | type BoxedPunnelFrameSink = Box<Sink<SinkItem = PunnelFrame, SinkError = io::Error>>;
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Sink<SinkItem = PunnelFrame, SinkError = io::Error>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:22:35
[INFO] [stderr]    |
[INFO] [stderr] 22 | type BoxedPunnelFrameStream = Box<Stream<Item = PunnelFrame, Error = io::Error>>;
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Stream<Item = PunnelFrame, Error = io::Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Shutdown`
[INFO] [stderr]   --> src/main.rs:11:52
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::net::{Ipv6Addr, SocketAddr, SocketAddrV6, Shutdown};
[INFO] [stderr]    |                                                    ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Codec`, `Framed`
[INFO] [stderr]   --> src/main.rs:13:26
[INFO] [stderr]    |
[INFO] [stderr] 13 | use tokio_core::io::{Io, Codec, Framed};
[INFO] [stderr]    |                          ^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:21:33
[INFO] [stderr]    |
[INFO] [stderr] 21 | type BoxedPunnelFrameSink = Box<Sink<SinkItem = PunnelFrame, SinkError = io::Error>>;
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Sink<SinkItem = PunnelFrame, SinkError = io::Error>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:22:35
[INFO] [stderr]    |
[INFO] [stderr] 22 | type BoxedPunnelFrameStream = Box<Stream<Item = PunnelFrame, Error = io::Error>>;
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Stream<Item = PunnelFrame, Error = io::Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Future`
[INFO] [stderr]  --> src/main.rs:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | use futures::{Future, Sink};
[INFO] [stderr]   |               ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `local_port`
[INFO] [stderr]    --> src/main.rs:132:14
[INFO] [stderr]     |
[INFO] [stderr] 132 | fn do_client(local_port: SocketAddr, server_host_port: SocketAddr) {}
[INFO] [stderr]     |              ^^^^^^^^^^ help: consider prefixing with an underscore: `_local_port`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `server_host_port`
[INFO] [stderr]    --> src/main.rs:132:38
[INFO] [stderr]     |
[INFO] [stderr] 132 | fn do_client(local_port: SocketAddr, server_host_port: SocketAddr) {}
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_server_host_port`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `addr`
[INFO] [stderr]    --> src/main.rs:162:53
[INFO] [stderr]     |
[INFO] [stderr] 162 |             Ok(listener.incoming().for_each(|(cnxn, addr)| {
[INFO] [stderr]     |                                                     ^^^^ help: consider prefixing with an underscore: `_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `connect_to_port`
[INFO] [stderr]    --> src/main.rs:156:14
[INFO] [stderr]     |
[INFO] [stderr] 156 | fn do_server(connect_to_port: SocketAddr) {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_connect_to_port`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sub_matches`
[INFO] [stderr]    --> src/main.rs:197:25
[INFO] [stderr]     |
[INFO] [stderr] 197 |         ("client", Some(sub_matches)) => {
[INFO] [stderr]     |                         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_sub_matches`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sub_matches`
[INFO] [stderr]    --> src/main.rs:202:25
[INFO] [stderr]     |
[INFO] [stderr] 202 |         ("server", Some(sub_matches)) => {
[INFO] [stderr]     |                         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_sub_matches`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cnxn`
[INFO] [stderr]   --> src/main.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |         if let Some(cnxn) = self.connections.remove(&id) {
[INFO] [stderr]    |                     ^^^^ help: consider prefixing with an underscore: `_cnxn`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `write_stream`
[INFO] [stderr]    --> src/main.rs:120:17
[INFO] [stderr]     |
[INFO] [stderr] 120 |             let write_stream = cnxn.clone();
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_write_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read_stream`
[INFO] [stderr]    --> src/main.rs:121:17
[INFO] [stderr]     |
[INFO] [stderr] 121 |             let read_stream = cnxn.clone();
[INFO] [stderr]     |                 ^^^^^^^^^^^ help: consider prefixing with an underscore: `_read_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `seq`
[INFO] [stderr]    --> src/main.rs:119:29
[INFO] [stderr]     |
[INFO] [stderr] 119 |         }).and_then(|(cnxn, seq)| {
[INFO] [stderr]     |                             ^^^ help: consider prefixing with an underscore: `_seq`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]    --> src/main.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 |         let stream = self.tunnel_stream.and_then(|connect_frame| {
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `seq`
[INFO] [stderr]    --> src/main.rs:142:45
[INFO] [stderr]     |
[INFO] [stderr] 142 |             if let PunnelFrame::Connect{id, seq} = p {
[INFO] [stderr]     |                                             ^^^ help: try ignoring the field: `seq: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Future`
[INFO] [stderr]  --> src/main.rs:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | use futures::{Future, Sink};
[INFO] [stderr]   |               ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `local_port`
[INFO] [stderr]    --> src/main.rs:132:14
[INFO] [stderr]     |
[INFO] [stderr] 132 | fn do_client(local_port: SocketAddr, server_host_port: SocketAddr) {}
[INFO] [stderr]     |              ^^^^^^^^^^ help: consider prefixing with an underscore: `_local_port`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `server_host_port`
[INFO] [stderr]    --> src/main.rs:132:38
[INFO] [stderr]     |
[INFO] [stderr] 132 | fn do_client(local_port: SocketAddr, server_host_port: SocketAddr) {}
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_server_host_port`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `addr`
[INFO] [stderr]    --> src/main.rs:162:53
[INFO] [stderr]     |
[INFO] [stderr] 162 |             Ok(listener.incoming().for_each(|(cnxn, addr)| {
[INFO] [stderr]     |                                                     ^^^^ help: consider prefixing with an underscore: `_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `connect_to_port`
[INFO] [stderr]    --> src/main.rs:156:14
[INFO] [stderr]     |
[INFO] [stderr] 156 | fn do_server(connect_to_port: SocketAddr) {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_connect_to_port`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sub_matches`
[INFO] [stderr]    --> src/main.rs:197:25
[INFO] [stderr]     |
[INFO] [stderr] 197 |         ("client", Some(sub_matches)) => {
[INFO] [stderr]     |                         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_sub_matches`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sub_matches`
[INFO] [stderr]    --> src/main.rs:202:25
[INFO] [stderr]     |
[INFO] [stderr] 202 |         ("server", Some(sub_matches)) => {
[INFO] [stderr]     |                         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_sub_matches`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cnxn`
[INFO] [stderr]   --> src/main.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |         if let Some(cnxn) = self.connections.remove(&id) {
[INFO] [stderr]    |                     ^^^^ help: consider prefixing with an underscore: `_cnxn`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `write_stream`
[INFO] [stderr]    --> src/main.rs:120:17
[INFO] [stderr]     |
[INFO] [stderr] 120 |             let write_stream = cnxn.clone();
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_write_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read_stream`
[INFO] [stderr]    --> src/main.rs:121:17
[INFO] [stderr]     |
[INFO] [stderr] 121 |             let read_stream = cnxn.clone();
[INFO] [stderr]     |                 ^^^^^^^^^^^ help: consider prefixing with an underscore: `_read_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `seq`
[INFO] [stderr]    --> src/main.rs:119:29
[INFO] [stderr]     |
[INFO] [stderr] 119 |         }).and_then(|(cnxn, seq)| {
[INFO] [stderr]     |                             ^^^ help: consider prefixing with an underscore: `_seq`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]    --> src/main.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 |         let stream = self.tunnel_stream.and_then(|connect_frame| {
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `seq`
[INFO] [stderr]    --> src/main.rs:142:45
[INFO] [stderr]     |
[INFO] [stderr] 142 |             if let PunnelFrame::Connect{id, seq} = p {
[INFO] [stderr]     |                                             ^^^ help: try ignoring the field: `seq: _`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:159:9
[INFO] [stderr]     |
[INFO] [stderr] 159 |     let mut local_port: SocketAddr = SocketAddr::V6(SocketAddrV6::new(get_inaddr_any(), 0, 0, 0));
[INFO] [stderr]     |         ----^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:159:9
[INFO] [stderr]     |
[INFO] [stderr] 159 |     let mut local_port: SocketAddr = SocketAddr::V6(SocketAddrV6::new(get_inaddr_any(), 0, 0, 0));
[INFO] [stderr]     |         ----^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ToBeAcked`
[INFO] [stderr]   --> src/main.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | struct ToBeAcked {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Connection`
[INFO] [stderr]   --> src/main.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Connection {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ConnectionRegistry`
[INFO] [stderr]   --> src/main.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | struct ConnectionRegistry {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register`
[INFO] [stderr]   --> src/main.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn register(&mut self, tcp_stream: TcpStream) -> Arc<Connection> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/main.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     fn add(&mut self, id: u32, tcp_stream: TcpStream) -> Arc<Connection> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_connection`
[INFO] [stderr]   --> src/main.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn get_connection(&self, id: u32) -> Option<&Arc<Connection>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `close`
[INFO] [stderr]   --> src/main.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     fn close(&mut self, id: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ConnectedConnection`
[INFO] [stderr]   --> src/main.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | struct ConnectedConnection {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 | /     fn new(registry: Rc<ConnectionRegistry>,
[INFO] [stderr] 88 | |            tunnel_sink: BoxedPunnelFrameSink,
[INFO] [stderr] 89 | |            tunnel_stream: BoxedPunnelFrameStream,
[INFO] [stderr] 90 | |            handle: Arc<Handle>)
[INFO] [stderr] ...  |
[INFO] [stderr] 97 | |         }
[INFO] [stderr] 98 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tunnel`
[INFO] [stderr]    --> src/main.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |     fn tunnel(self) -> Result<(), io::Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tunnel_sink`
[INFO] [stderr]    --> src/main.rs:135:5
[INFO] [stderr]     |
[INFO] [stderr] 135 |     tunnel_sink: BoxedPunnelFrameSink,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `futures::stream::AndThen` that must be used
[INFO] [stderr]    --> src/main.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 | /         self.tunnel_stream.and_then(|p| {
[INFO] [stderr] 142 | |             if let PunnelFrame::Connect{id, seq} = p {
[INFO] [stderr] 143 | |                 if id == 0 {
[INFO] [stderr] 144 | |                     // create a new session
[INFO] [stderr] ...   |
[INFO] [stderr] 151 | |             }
[INFO] [stderr] 152 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: streams do nothing unless polled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:206:16
[INFO] [stderr]     |
[INFO] [stderr] 206 |         _ => { app.print_help(); }
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ToBeAcked`
[INFO] [stderr]   --> src/main.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | struct ToBeAcked {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Connection`
[INFO] [stderr]   --> src/main.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Connection {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ConnectionRegistry`
[INFO] [stderr]   --> src/main.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | struct ConnectionRegistry {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register`
[INFO] [stderr]   --> src/main.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn register(&mut self, tcp_stream: TcpStream) -> Arc<Connection> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/main.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     fn add(&mut self, id: u32, tcp_stream: TcpStream) -> Arc<Connection> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_connection`
[INFO] [stderr]   --> src/main.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn get_connection(&self, id: u32) -> Option<&Arc<Connection>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `close`
[INFO] [stderr]   --> src/main.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     fn close(&mut self, id: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ConnectedConnection`
[INFO] [stderr]   --> src/main.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | struct ConnectedConnection {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 | /     fn new(registry: Rc<ConnectionRegistry>,
[INFO] [stderr] 88 | |            tunnel_sink: BoxedPunnelFrameSink,
[INFO] [stderr] 89 | |            tunnel_stream: BoxedPunnelFrameStream,
[INFO] [stderr] 90 | |            handle: Arc<Handle>)
[INFO] [stderr] ...  |
[INFO] [stderr] 97 | |         }
[INFO] [stderr] 98 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tunnel`
[INFO] [stderr]    --> src/main.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |     fn tunnel(self) -> Result<(), io::Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tunnel_sink`
[INFO] [stderr]    --> src/main.rs:135:5
[INFO] [stderr]     |
[INFO] [stderr] 135 |     tunnel_sink: BoxedPunnelFrameSink,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `futures::stream::AndThen` that must be used
[INFO] [stderr]    --> src/main.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 | /         self.tunnel_stream.and_then(|p| {
[INFO] [stderr] 142 | |             if let PunnelFrame::Connect{id, seq} = p {
[INFO] [stderr] 143 | |                 if id == 0 {
[INFO] [stderr] 144 | |                     // create a new session
[INFO] [stderr] ...   |
[INFO] [stderr] 151 | |             }
[INFO] [stderr] 152 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: streams do nothing unless polled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:206:16
[INFO] [stderr]     |
[INFO] [stderr] 206 |         _ => { app.print_help(); }
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.06s
[INFO] running `"docker" "inspect" "150bbcb32bb12ff7a21f8b3065bfd9da0453a5fb9e22d22d46a19da8c6ae9c28"`
[INFO] running `"docker" "rm" "-f" "150bbcb32bb12ff7a21f8b3065bfd9da0453a5fb9e22d22d46a19da8c6ae9c28"`
[INFO] [stdout] 150bbcb32bb12ff7a21f8b3065bfd9da0453a5fb9e22d22d46a19da8c6ae9c28