[INFO] updating cached repository https://github.com/gluaxspeed/r2wc
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cdc59383aab43b4c6439f6b4eae38cd2208c082f
[INFO] checking gluaxspeed/r2wc against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgluaxspeed%2Fr2wc" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gluaxspeed/r2wc 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/gluaxspeed/r2wc
[INFO] finished tweaking git repo https://github.com/gluaxspeed/r2wc
[INFO] tweaked toml for git repo https://github.com/gluaxspeed/r2wc written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/gluaxspeed/r2wc 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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 2bcf139bbff53def3adc9ae2995ddfd13b63e3e151d2432b3325c5ace52c3a5c
[INFO] running `"docker" "start" "-a" "2bcf139bbff53def3adc9ae2995ddfd13b63e3e151d2432b3325c5ace52c3a5c"`
[INFO] [stderr]    Compiling ncurses v5.94.0
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking stopwatch v0.0.7
[INFO] [stderr]     Checking r2wc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `get_client`
[INFO] [stderr]   --> src/connection/peer.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn get_client(server: &TcpListener) -> Option<Peer> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `set_port`
[INFO] [stderr]   --> src/connection.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn set_port() -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_server`
[INFO] [stderr]   --> src/connection.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn create_server() -> TcpListener {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_peer`
[INFO] [stderr]   --> src/connection.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn get_peer(&self) -> Option<Peer> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_connection`
[INFO] [stderr]   --> src/connection.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn new_connection(msg_size: usize, taken: Option<bool>) -> Connection {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_server_connection`
[INFO] [stderr]    --> src/connection.rs:111:5
[INFO] [stderr]     |
[INFO] [stderr] 111 |     pub fn new_server_connection(msg_size: usize) -> (Connection, TcpListener) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `await_client`
[INFO] [stderr]    --> src/connection.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn await_client(&mut self, server: &TcpListener) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `await_client_timeout`
[INFO] [stderr]    --> src/connection.rs:162:5
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn await_client_timeout(&mut self, server: &TcpListener) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reject_other_clients`
[INFO] [stderr]    --> src/connection.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     pub fn reject_other_clients(&self, server: &TcpListener) -> (bool, Option<Peer>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/connection/peer.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn new(stream: TcpStream, who: String) -> Peer {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `set_server_port`
[INFO] [stderr]   --> src/connection.rs:58:1
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn set_server_port() -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `connect_server`
[INFO] [stderr]   --> src/connection.rs:74:1
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub fn connect_server() -> TcpStream {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_connection`
[INFO] [stderr]   --> src/connection.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn new_connection(msg_size: usize, taken: Option<bool>) -> Connection {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_client_connection`
[INFO] [stderr]    --> src/connection.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 |     pub fn new_client_connection(msg_size: usize) -> Connection {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `await_client`
[INFO] [stderr]    --> src/connection.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn await_client(&mut self, server: &TcpListener) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_client`
[INFO] [stderr]   --> src/connection/peer.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn get_client(server: &TcpListener) -> Option<Peer> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `set_port`
[INFO] [stderr]   --> src/connection.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn set_port() -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_server`
[INFO] [stderr]   --> src/connection.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn create_server() -> TcpListener {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_peer`
[INFO] [stderr]   --> src/connection.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn get_peer(&self) -> Option<Peer> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_connection`
[INFO] [stderr]   --> src/connection.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn new_connection(msg_size: usize, taken: Option<bool>) -> Connection {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_server_connection`
[INFO] [stderr]    --> src/connection.rs:111:5
[INFO] [stderr]     |
[INFO] [stderr] 111 |     pub fn new_server_connection(msg_size: usize) -> (Connection, TcpListener) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `await_client`
[INFO] [stderr]    --> src/connection.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn await_client(&mut self, server: &TcpListener) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `await_client_timeout`
[INFO] [stderr]    --> src/connection.rs:162:5
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn await_client_timeout(&mut self, server: &TcpListener) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reject_other_clients`
[INFO] [stderr]    --> src/connection.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     pub fn reject_other_clients(&self, server: &TcpListener) -> (bool, Option<Peer>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/connection/peer.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn new(stream: TcpStream, who: String) -> Peer {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `set_server_port`
[INFO] [stderr]   --> src/connection.rs:58:1
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn set_server_port() -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `connect_server`
[INFO] [stderr]   --> src/connection.rs:74:1
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub fn connect_server() -> TcpStream {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_connection`
[INFO] [stderr]   --> src/connection.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn new_connection(msg_size: usize, taken: Option<bool>) -> Connection {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_client_connection`
[INFO] [stderr]    --> src/connection.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 |     pub fn new_client_connection(msg_size: usize) -> Connection {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `await_client`
[INFO] [stderr]    --> src/connection.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn await_client(&mut self, server: &TcpListener) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.17s
[INFO] running `"docker" "inspect" "2bcf139bbff53def3adc9ae2995ddfd13b63e3e151d2432b3325c5ace52c3a5c"`
[INFO] running `"docker" "rm" "-f" "2bcf139bbff53def3adc9ae2995ddfd13b63e3e151d2432b3325c5ace52c3a5c"`
[INFO] [stdout] 2bcf139bbff53def3adc9ae2995ddfd13b63e3e151d2432b3325c5ace52c3a5c