[INFO] updating cached repository https://github.com/ShibbyContinuum/mio_pong
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f2dfc467c4b8ed2e47f1df9770eed7bc795bf496
[INFO] checking ShibbyContinuum/mio_pong/f2dfc467c4b8ed2e47f1df9770eed7bc795bf496 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShibbyContinuum%2Fmio_pong" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ShibbyContinuum/mio_pong on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ShibbyContinuum/mio_pong
[INFO] finished tweaking git repo https://github.com/ShibbyContinuum/mio_pong
[INFO] tweaked toml for git repo https://github.com/ShibbyContinuum/mio_pong written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ShibbyContinuum/mio_pong already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42b909bb2c8ce1e1f8bcfba4ec0a6bfc9ec91f0c8805041fc37cebe587e10702
[INFO] running `Command { std: "docker" "start" "-a" "42b909bb2c8ce1e1f8bcfba4ec0a6bfc9ec91f0c8805041fc37cebe587e10702", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42b909bb2c8ce1e1f8bcfba4ec0a6bfc9ec91f0c8805041fc37cebe587e10702", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42b909bb2c8ce1e1f8bcfba4ec0a6bfc9ec91f0c8805041fc37cebe587e10702", kill_on_drop: false }`
[INFO] [stdout] 42b909bb2c8ce1e1f8bcfba4ec0a6bfc9ec91f0c8805041fc37cebe587e10702
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbb08f6de20ccde8761606c69975dbeb245ee694dffaa0d58c13e2e0eb69d546
[INFO] running `Command { std: "docker" "start" "-a" "bbb08f6de20ccde8761606c69975dbeb245ee694dffaa0d58c13e2e0eb69d546", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking libc v0.2.13
[INFO] [stderr]     Checking winapi v0.2.7
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]     Checking net2 v0.2.25
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking miow v0.1.2
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr]     Checking mio_pong v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `mio::util::Slab`
[INFO] [stdout]  --> src/client/ping.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mio::util::Slab;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::OpenOptions`
[INFO] [stdout]   --> src/client/ping.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fs::OpenOptions;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mio::util::Slab`
[INFO] [stdout]  --> src/client/ping.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mio::util::Slab;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::OpenOptions`
[INFO] [stdout]   --> src/client/ping.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fs::OpenOptions;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_LINE` is never used
[INFO] [stdout]   --> src/client/ping.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const MAX_LINE: usize = 128;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Connection` is never constructed
[INFO] [stdout]   --> src/client/ping.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct Connection {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `ready`, `read`, `write`, `reregister`, and `is_closed` are never used
[INFO] [stdout]    --> src/client/ping.rs:75:8
[INFO] [stdout]     |
[INFO] [stdout] 74  | impl Connection {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout] 75  |     fn new(socket: TcpStream, token: Token) -> Connection {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 83  |     fn ready(&mut self, event_loop: &mut EventLoop<Ping>, events: EventSet) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 97  |     fn read(&mut self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 122 |     fn write(&mut self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |     fn reregister(&self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 149 |     fn is_closed(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `State` is never used
[INFO] [stdout]    --> src/client/ping.rs:158:6
[INFO] [stdout]     |
[INFO] [stdout] 158 | enum State {
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/client/ping.rs:165:8
[INFO] [stdout]     |
[INFO] [stdout] 164 | impl State {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout] 165 |     fn mut_read_buf(&mut self) -> &mut Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn read_buf(&self) -> &[u8] {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     fn write_buf(&self) -> &Take<Cursor<Vec<u8>>> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 186 |     fn mut_write_buf(&mut self) -> &mut Take<Cursor<Vec<u8>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 195 |     fn try_transition_to_writing(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 216 |     fn try_transition_to_reading(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 235 |     fn event_set(&self) -> EventSet {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 243 |     fn unwrap_read_buf(self) -> Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 250 |     fn unwrap_write_buf(self) -> Take<Cursor<Vec<u8>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `drain_to` is never used
[INFO] [stdout]    --> src/client/ping.rs:258:4
[INFO] [stdout]     |
[INFO] [stdout] 258 | fn drain_to(vec: &mut Vec<u8>, count: usize) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_LINE` is never used
[INFO] [stdout]   --> src/client/ping.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const MAX_LINE: usize = 128;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Connection` is never constructed
[INFO] [stdout]   --> src/client/ping.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct Connection {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `ready`, `read`, `write`, `reregister`, and `is_closed` are never used
[INFO] [stdout]    --> src/client/ping.rs:75:8
[INFO] [stdout]     |
[INFO] [stdout] 74  | impl Connection {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout] 75  |     fn new(socket: TcpStream, token: Token) -> Connection {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 83  |     fn ready(&mut self, event_loop: &mut EventLoop<Ping>, events: EventSet) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 97  |     fn read(&mut self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 122 |     fn write(&mut self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |     fn reregister(&self, event_loop: &mut EventLoop<Ping>) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 149 |     fn is_closed(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `State` is never used
[INFO] [stdout]    --> src/client/ping.rs:158:6
[INFO] [stdout]     |
[INFO] [stdout] 158 | enum State {
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/client/ping.rs:165:8
[INFO] [stdout]     |
[INFO] [stdout] 164 | impl State {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout] 165 |     fn mut_read_buf(&mut self) -> &mut Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn read_buf(&self) -> &[u8] {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     fn write_buf(&self) -> &Take<Cursor<Vec<u8>>> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 186 |     fn mut_write_buf(&mut self) -> &mut Take<Cursor<Vec<u8>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 195 |     fn try_transition_to_writing(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 216 |     fn try_transition_to_reading(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 235 |     fn event_set(&self) -> EventSet {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 243 |     fn unwrap_read_buf(self) -> Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 250 |     fn unwrap_write_buf(self) -> Take<Cursor<Vec<u8>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `drain_to` is never used
[INFO] [stdout]    --> src/client/ping.rs:258:4
[INFO] [stdout]     |
[INFO] [stdout] 258 | fn drain_to(vec: &mut Vec<u8>, count: usize) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/client/ping.rs:52:29
[INFO] [stdout]    |
[INFO] [stdout] 52 | ...                   self.connections.read_to_end(&mut vec);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 52 |                             let _ = self.connections.read_to_end(&mut vec);
[INFO] [stdout]    |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/client/ping.rs:52:29
[INFO] [stdout]    |
[INFO] [stdout] 52 | ...                   self.connections.read_to_end(&mut vec);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 52 |                             let _ = self.connections.read_to_end(&mut vec);
[INFO] [stdout]    |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pong`
[INFO] [stdout]  --> src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let pong = Pong::start("0.0.0.0:6567".parse().ok().expect("Unable to start server"));
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_pong`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ping`
[INFO] [stdout]   --> src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let ping = Ping::start("0.0.0.0:6567".parse().ok().expect("Unable to start client"));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_ping`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_pong`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let start_pong = thread::spawn(move || { start_pong() });
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_pong`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_ping`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let start_ping = thread::spawn(move || { start_ping() });
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_ping`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pong`
[INFO] [stdout]  --> src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let pong = Pong::start("0.0.0.0:6567".parse().ok().expect("Unable to start server"));
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_pong`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ping`
[INFO] [stdout]   --> src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let ping = Ping::start("0.0.0.0:6567".parse().ok().expect("Unable to start client"));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_ping`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_pong`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let start_pong = thread::spawn(move || { start_pong() });
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_pong`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_ping`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let start_ping = thread::spawn(move || { start_ping() });
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_ping`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.86s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bitflags v0.4.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] running `Command { std: "docker" "inspect" "bbb08f6de20ccde8761606c69975dbeb245ee694dffaa0d58c13e2e0eb69d546", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbb08f6de20ccde8761606c69975dbeb245ee694dffaa0d58c13e2e0eb69d546", kill_on_drop: false }`
[INFO] [stdout] bbb08f6de20ccde8761606c69975dbeb245ee694dffaa0d58c13e2e0eb69d546