[INFO] cloning repository https://github.com/leetie/Fe-chat-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/leetie/Fe-chat-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleetie%2FFe-chat-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleetie%2FFe-chat-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c86cdfc6d376ab13fd2b3ffe3413abbe68115f92
[INFO] checking leetie/Fe-chat-server against try#be699666730c5a1745838222e98e2d85019affdc for pr-134300
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleetie%2FFe-chat-server" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leetie/Fe-chat-server on toolchain be699666730c5a1745838222e98e2d85019affdc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+be699666730c5a1745838222e98e2d85019affdc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/leetie/Fe-chat-server
[INFO] finished tweaking git repo https://github.com/leetie/Fe-chat-server
[INFO] tweaked toml for git repo https://github.com/leetie/Fe-chat-server written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/leetie/Fe-chat-server 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" "+be699666730c5a1745838222e98e2d85019affdc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+be699666730c5a1745838222e98e2d85019affdc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02def494b30dc979bce0bc398de93ffb29d7d261665bd3ae134ceb62ff3551c9
[INFO] running `Command { std: "docker" "start" "-a" "02def494b30dc979bce0bc398de93ffb29d7d261665bd3ae134ceb62ff3551c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02def494b30dc979bce0bc398de93ffb29d7d261665bd3ae134ceb62ff3551c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02def494b30dc979bce0bc398de93ffb29d7d261665bd3ae134ceb62ff3551c9", kill_on_drop: false }`
[INFO] [stdout] 02def494b30dc979bce0bc398de93ffb29d7d261665bd3ae134ceb62ff3551c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+be699666730c5a1745838222e98e2d85019affdc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2dd4a34856f2602bb7ca45abfeb5c0b6acd059d281c8d7dc57e9647d6854e14
[INFO] running `Command { std: "docker" "start" "-a" "b2dd4a34856f2602bb7ca45abfeb5c0b6acd059d281c8d7dc57e9647d6854e14", kill_on_drop: false }`
[INFO] [stderr]     Checking tcp-server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `message` is never read
[INFO] [stdout]  --> src/lib.rs:2:3
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Config {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 2 |   message: String,
[INFO] [stdout]   |   ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `message` is never read
[INFO] [stdout]  --> src/lib.rs:2:3
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Config {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 2 |   message: String,
[INFO] [stdout]   |   ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/bin/client.rs:1:35
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/bin/client.rs:1:35
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/bin/main.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 |     io::{self, BufRead, BufReader, Read, Write},
[INFO] [stdout]   |                                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/bin/main.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 |     io::{self, BufRead, BufReader, Read, Write},
[INFO] [stdout]   |                                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream_tx_thread`
[INFO] [stdout]   --> src/bin/client.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 |   let stream_tx_thread = thread::spawn(move || loop {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream_tx_thread`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream_tx_thread`
[INFO] [stdout]   --> src/bin/client.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 |   let stream_tx_thread = thread::spawn(move || loop {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream_tx_thread`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/client.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 |   let mut stream = TcpStream::connect("0.0.0.0:2222").unwrap();
[INFO] [stdout]   |       ----^^^^^^
[INFO] [stdout]   |       |
[INFO] [stdout]   |       help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_message` is never used
[INFO] [stdout]   --> src/bin/client.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn get_message() -> Result<String, std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/client.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 |   let mut stream = TcpStream::connect("0.0.0.0:2222").unwrap();
[INFO] [stdout]   |       ----^^^^^^
[INFO] [stdout]   |       |
[INFO] [stdout]   |       help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_message` is never used
[INFO] [stdout]   --> src/bin/client.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn get_message() -> Result<String, std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/client.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     msg_tx.send(b"Hello!\n");
[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] 41 |     let _ = msg_tx.send(b"Hello!\n");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/client.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     msg_tx.send(b"Hello!\n");
[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] 41 |     let _ = msg_tx.send(b"Hello!\n");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Message` is never constructed
[INFO] [stdout]   --> src/bin/main.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 97 | struct Message<'a> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Client` is never constructed
[INFO] [stdout]    --> src/bin/main.rs:103:8
[INFO] [stdout]     |
[INFO] [stdout] 103 | struct Client {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ClientConfig` is never constructed
[INFO] [stdout]    --> src/bin/main.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | struct ClientConfig {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `DisplayColor` is never used
[INFO] [stdout]    --> src/bin/main.rs:114:6
[INFO] [stdout]     |
[INFO] [stdout] 114 | enum DisplayColor {
[INFO] [stdout]     |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Message` is never constructed
[INFO] [stdout]   --> src/bin/main.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 97 | struct Message<'a> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Client` is never constructed
[INFO] [stdout]    --> src/bin/main.rs:103:8
[INFO] [stdout]     |
[INFO] [stdout] 103 | struct Client {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ClientConfig` is never constructed
[INFO] [stdout]    --> src/bin/main.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | struct ClientConfig {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `DisplayColor` is never used
[INFO] [stdout]    --> src/bin/main.rs:114:6
[INFO] [stdout]     |
[INFO] [stdout] 114 | enum DisplayColor {
[INFO] [stdout]     |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "b2dd4a34856f2602bb7ca45abfeb5c0b6acd059d281c8d7dc57e9647d6854e14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2dd4a34856f2602bb7ca45abfeb5c0b6acd059d281c8d7dc57e9647d6854e14", kill_on_drop: false }`
[INFO] [stdout] b2dd4a34856f2602bb7ca45abfeb5c0b6acd059d281c8d7dc57e9647d6854e14