[INFO] updating cached repository ShibbyContinuum/mio_pong
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ShibbyContinuum/mio_pong
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ShibbyContinuum/mio_pong" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/ShibbyContinuum/mio_pong"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/ShibbyContinuum/mio_pong'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ShibbyContinuum/mio_pong" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/ShibbyContinuum/mio_pong"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/ShibbyContinuum/mio_pong'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f2dfc467c4b8ed2e47f1df9770eed7bc795bf496
[INFO] sha for GitHub repo ShibbyContinuum/mio_pong: f2dfc467c4b8ed2e47f1df9770eed7bc795bf496
[INFO] validating manifest of ShibbyContinuum/mio_pong on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ShibbyContinuum/mio_pong on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ShibbyContinuum/mio_pong
[INFO] finished frobbing ShibbyContinuum/mio_pong
[INFO] frobbed toml for ShibbyContinuum/mio_pong written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/ShibbyContinuum/mio_pong/Cargo.toml
[INFO] started frobbing ShibbyContinuum/mio_pong
[INFO] finished frobbing ShibbyContinuum/mio_pong
[INFO] frobbed toml for ShibbyContinuum/mio_pong written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/ShibbyContinuum/mio_pong/Cargo.toml
[INFO] crate ShibbyContinuum/mio_pong already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/ShibbyContinuum/mio_pong/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ShibbyContinuum/mio_pong against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-0/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/ShibbyContinuum/mio_pong:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3cb9598c38cce71b27a3fd6bf51f88122d06a81f87b3568f0a425a055d018d69
[INFO] running `"docker" "start" "-a" "3cb9598c38cce71b27a3fd6bf51f88122d06a81f87b3568f0a425a055d018d69"`
[INFO] [stderr]     Checking mio_pong v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `mio::util::Slab`
[INFO] [stderr]  --> src/client/ping.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use mio::util::Slab;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::OpenOptions`
[INFO] [stderr]   --> src/client/ping.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::fs::OpenOptions;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `mio::util::Slab`
[INFO] [stderr]  --> src/client/ping.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use mio::util::Slab;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::OpenOptions`
[INFO] [stderr]   --> src/client/ping.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::fs::OpenOptions;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `MAX_LINE`
[INFO] [stderr]   --> src/client/ping.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const MAX_LINE: usize = 128;
[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/client/ping.rs:68:1
[INFO] [stderr]    |
[INFO] [stderr] 68 | struct Connection {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/client/ping.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     fn new(socket: TcpStream, token: Token) -> Connection {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `ready`
[INFO] [stderr]   --> src/client/ping.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     fn ready(&mut self, event_loop: &mut EventLoop<Ping>, events: EventSet) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read`
[INFO] [stderr]   --> src/client/ping.rs:97:5
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn read(&mut self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write`
[INFO] [stderr]    --> src/client/ping.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 |     fn write(&mut self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reregister`
[INFO] [stderr]    --> src/client/ping.rs:144:5
[INFO] [stderr]     |
[INFO] [stderr] 144 |     fn reregister(&self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_closed`
[INFO] [stderr]    --> src/client/ping.rs:149:5
[INFO] [stderr]     |
[INFO] [stderr] 149 |     fn is_closed(&self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `State`
[INFO] [stderr]    --> src/client/ping.rs:158:1
[INFO] [stderr]     |
[INFO] [stderr] 158 | enum State {
[INFO] [stderr]     | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mut_read_buf`
[INFO] [stderr]    --> src/client/ping.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     fn mut_read_buf(&mut self) -> &mut Vec<u8> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_buf`
[INFO] [stderr]    --> src/client/ping.rs:172:5
[INFO] [stderr]     |
[INFO] [stderr] 172 |     fn read_buf(&self) -> &[u8] {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write_buf`
[INFO] [stderr]    --> src/client/ping.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     fn write_buf(&self) -> &Take<Cursor<Vec<u8>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mut_write_buf`
[INFO] [stderr]    --> src/client/ping.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn mut_write_buf(&mut self) -> &mut Take<Cursor<Vec<u8>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `try_transition_to_writing`
[INFO] [stderr]    --> src/client/ping.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 |     fn try_transition_to_writing(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `try_transition_to_reading`
[INFO] [stderr]    --> src/client/ping.rs:216:5
[INFO] [stderr]     |
[INFO] [stderr] 216 |     fn try_transition_to_reading(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `event_set`
[INFO] [stderr]    --> src/client/ping.rs:235:5
[INFO] [stderr]     |
[INFO] [stderr] 235 |     fn event_set(&self) -> EventSet {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap_read_buf`
[INFO] [stderr]    --> src/client/ping.rs:243:5
[INFO] [stderr]     |
[INFO] [stderr] 243 |     fn unwrap_read_buf(self) -> Vec<u8> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap_write_buf`
[INFO] [stderr]    --> src/client/ping.rs:250:5
[INFO] [stderr]     |
[INFO] [stderr] 250 |     fn unwrap_write_buf(self) -> Take<Cursor<Vec<u8>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `drain_to`
[INFO] [stderr]    --> src/client/ping.rs:258:1
[INFO] [stderr]     |
[INFO] [stderr] 258 | fn drain_to(vec: &mut Vec<u8>, count: usize) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/client/ping.rs:52:29
[INFO] [stderr]    |
[INFO] [stderr] 52 |                             self.connections.read_to_end(&mut vec);
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `MAX_LINE`
[INFO] [stderr]   --> src/client/ping.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const MAX_LINE: usize = 128;
[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/client/ping.rs:68:1
[INFO] [stderr]    |
[INFO] [stderr] 68 | struct Connection {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/client/ping.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     fn new(socket: TcpStream, token: Token) -> Connection {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `ready`
[INFO] [stderr]   --> src/client/ping.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     fn ready(&mut self, event_loop: &mut EventLoop<Ping>, events: EventSet) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read`
[INFO] [stderr]   --> src/client/ping.rs:97:5
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn read(&mut self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write`
[INFO] [stderr]    --> src/client/ping.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 |     fn write(&mut self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reregister`
[INFO] [stderr]    --> src/client/ping.rs:144:5
[INFO] [stderr]     |
[INFO] [stderr] 144 |     fn reregister(&self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_closed`
[INFO] [stderr]    --> src/client/ping.rs:149:5
[INFO] [stderr]     |
[INFO] [stderr] 149 |     fn is_closed(&self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `State`
[INFO] [stderr]    --> src/client/ping.rs:158:1
[INFO] [stderr]     |
[INFO] [stderr] 158 | enum State {
[INFO] [stderr]     | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mut_read_buf`
[INFO] [stderr]    --> src/client/ping.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     fn mut_read_buf(&mut self) -> &mut Vec<u8> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_buf`
[INFO] [stderr]    --> src/client/ping.rs:172:5
[INFO] [stderr]     |
[INFO] [stderr] 172 |     fn read_buf(&self) -> &[u8] {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write_buf`
[INFO] [stderr]    --> src/client/ping.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     fn write_buf(&self) -> &Take<Cursor<Vec<u8>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mut_write_buf`
[INFO] [stderr]    --> src/client/ping.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn mut_write_buf(&mut self) -> &mut Take<Cursor<Vec<u8>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `try_transition_to_writing`
[INFO] [stderr]    --> src/client/ping.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 |     fn try_transition_to_writing(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `try_transition_to_reading`
[INFO] [stderr]    --> src/client/ping.rs:216:5
[INFO] [stderr]     |
[INFO] [stderr] 216 |     fn try_transition_to_reading(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `event_set`
[INFO] [stderr]    --> src/client/ping.rs:235:5
[INFO] [stderr]     |
[INFO] [stderr] 235 |     fn event_set(&self) -> EventSet {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap_read_buf`
[INFO] [stderr]    --> src/client/ping.rs:243:5
[INFO] [stderr]     |
[INFO] [stderr] 243 |     fn unwrap_read_buf(self) -> Vec<u8> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap_write_buf`
[INFO] [stderr]    --> src/client/ping.rs:250:5
[INFO] [stderr]     |
[INFO] [stderr] 250 |     fn unwrap_write_buf(self) -> Take<Cursor<Vec<u8>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `drain_to`
[INFO] [stderr]    --> src/client/ping.rs:258:1
[INFO] [stderr]     |
[INFO] [stderr] 258 | fn drain_to(vec: &mut Vec<u8>, count: usize) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/client/ping.rs:52:29
[INFO] [stderr]    |
[INFO] [stderr] 52 |                             self.connections.read_to_end(&mut vec);
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pong`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let pong = Pong::start("0.0.0.0:6567".parse().ok().expect("Unable to start server"));
[INFO] [stderr]   |         ^^^^ help: consider prefixing with an underscore: `_pong`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ping`
[INFO] [stderr]   --> src/main.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let ping = Ping::start("0.0.0.0:6567".parse().ok().expect("Unable to start client"));
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_ping`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_pong`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let start_pong = thread::spawn(move || { start_pong() });
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_start_pong`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_ping`
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let start_ping = thread::spawn(move || { start_ping() });
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_start_ping`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pong`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let pong = Pong::start("0.0.0.0:6567".parse().ok().expect("Unable to start server"));
[INFO] [stderr]   |         ^^^^ help: consider prefixing with an underscore: `_pong`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ping`
[INFO] [stderr]   --> src/main.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let ping = Ping::start("0.0.0.0:6567".parse().ok().expect("Unable to start client"));
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_ping`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_pong`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let start_pong = thread::spawn(move || { start_pong() });
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_start_pong`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_ping`
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let start_ping = thread::spawn(move || { start_ping() });
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_start_ping`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `"docker" "inspect" "3cb9598c38cce71b27a3fd6bf51f88122d06a81f87b3568f0a425a055d018d69"`
[INFO] running `"docker" "rm" "-f" "3cb9598c38cce71b27a3fd6bf51f88122d06a81f87b3568f0a425a055d018d69"`
[INFO] [stdout] 3cb9598c38cce71b27a3fd6bf51f88122d06a81f87b3568f0a425a055d018d69