[INFO] cloning repository https://github.com/smolkov/chat_async
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/smolkov/chat_async" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsmolkov%2Fchat_async", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsmolkov%2Fchat_async'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 05654861858c5858509f178381ce0a6eacbed05d
[INFO] checking smolkov/chat_async against master#fe55364329579d361b1ab565728bc033a7dba07e for pr-146013
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsmolkov%2Fchat_async" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/smolkov/chat_async
[INFO] finished tweaking git repo https://github.com/smolkov/chat_async
[INFO] tweaked toml for git repo https://github.com/smolkov/chat_async written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/smolkov/chat_async on toolchain fe55364329579d361b1ab565728bc033a7dba07e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fe55364329579d361b1ab565728bc033a7dba07e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/smolkov/chat_async 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" "+fe55364329579d361b1ab565728bc033a7dba07e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+fe55364329579d361b1ab565728bc033a7dba07e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7f3dd92b9a5ce02cb5e8fa20cf76aefd0e7cc7b7996c407ab0f795d53ac7df90
[INFO] running `Command { std: "docker" "start" "-a" "7f3dd92b9a5ce02cb5e8fa20cf76aefd0e7cc7b7996c407ab0f795d53ac7df90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f3dd92b9a5ce02cb5e8fa20cf76aefd0e7cc7b7996c407ab0f795d53ac7df90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f3dd92b9a5ce02cb5e8fa20cf76aefd0e7cc7b7996c407ab0f795d53ac7df90", kill_on_drop: false }`
[INFO] [stdout] 7f3dd92b9a5ce02cb5e8fa20cf76aefd0e7cc7b7996c407ab0f795d53ac7df90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+fe55364329579d361b1ab565728bc033a7dba07e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1af7a60d93e4668ab23fa69e929e2a5609ae66331a493d8b20bb8a25867cf345
[INFO] running `Command { std: "docker" "start" "-a" "1af7a60d93e4668ab23fa69e929e2a5609ae66331a493d8b20bb8a25867cf345", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.70
[INFO] [stderr]    Compiling serde_derive v1.0.204
[INFO] [stderr]    Compiling tokio-macros v2.3.0
[INFO] [stderr]     Checking tokio v1.38.0
[INFO] [stderr]     Checking serde v1.0.204
[INFO] [stderr]     Checking serde_json v1.0.120
[INFO] [stderr]     Checking chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Deserialize` and `Serialize`
[INFO] [stdout]  --> src/message.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserialize` and `Serialize`
[INFO] [stdout]  --> src/message.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/room.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/room.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::BorrowMut`
[INFO] [stdout]  --> src/state.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::BorrowMut, collections::HashMap, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::BorrowMut`
[INFO] [stdout]  --> src/state.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::BorrowMut, collections::HashMap, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Mutex` and `broadcast`
[INFO] [stdout]  --> src/state.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tokio::sync::{broadcast, Mutex, RwLock};
[INFO] [stdout]   |                   ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::message::Message`
[INFO] [stdout]  --> src/state.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::message::Message;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Mutex` and `broadcast`
[INFO] [stdout]  --> src/state.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tokio::sync::{broadcast, Mutex, RwLock};
[INFO] [stdout]   |                   ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::message::Message`
[INFO] [stdout]  --> src/state.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::message::Message;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `any`
[INFO] [stdout]  --> src/bin/server.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{any, str::FromStr};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `broadcast` and `mpsc`
[INFO] [stdout]   --> src/bin/server.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     sync::{broadcast, mpsc},
[INFO] [stdout]    |            ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `any`
[INFO] [stdout]  --> src/bin/server.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{any, str::FromStr};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `broadcast` and `mpsc`
[INFO] [stdout]   --> src/bin/server.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     sync::{broadcast, mpsc},
[INFO] [stdout]    |            ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]   --> src/bin/server.rs:38:27
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Message::Text(msg) => {
[INFO] [stdout]    |                           ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `room`
[INFO] [stdout]   --> src/bin/server.rs:42:33
[INFO] [stdout]    |
[INFO] [stdout] 42 |             Message::ChangeRoom(room) => {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_room`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]   --> src/bin/server.rs:38:27
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Message::Text(msg) => {
[INFO] [stdout]    |                           ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `room`
[INFO] [stdout]   --> src/bin/server.rs:42:33
[INFO] [stdout]    |
[INFO] [stdout] 42 |             Message::ChangeRoom(room) => {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_room`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/bin/server.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | /     loop {
[INFO] [stdout] 82 | |         if let Ok((socket, addr)) = listener.accept().await {
[INFO] [stdout] 83 | |             let session = Session {
[INFO] [stdout] 84 | |                 stream: socket,
[INFO] [stdout] ...  |
[INFO] [stdout] 95 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 96 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]   --> src/bin/server.rs:82:28
[INFO] [stdout]    |
[INFO] [stdout] 82 |         if let Ok((socket, addr)) = listener.accept().await {
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/bin/server.rs:90:21
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 let err = process(session).await;
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/server.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let mut listener = TcpListener::bind("127.0.0.1:3000").await?;
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/bin/server.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | /     loop {
[INFO] [stdout] 82 | |         if let Ok((socket, addr)) = listener.accept().await {
[INFO] [stdout] 83 | |             let session = Session {
[INFO] [stdout] 84 | |                 stream: socket,
[INFO] [stdout] ...  |
[INFO] [stdout] 95 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 96 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]   --> src/bin/server.rs:82:28
[INFO] [stdout]    |
[INFO] [stdout] 82 |         if let Ok((socket, addr)) = listener.accept().await {
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/bin/server.rs:90:21
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 let err = process(session).await;
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/server.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let mut listener = TcpListener::bind("127.0.0.1:3000").await?;
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `user` is never read
[INFO] [stdout]   --> src/bin/server.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Session {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 14 |     user: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `process_message` is never used
[INFO] [stdout]   --> src/bin/server.rs:36:18
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl Session {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub async fn process_message(&mut self, message: Message) -> Result<()> {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `user` is never read
[INFO] [stdout]   --> src/bin/server.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Session {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 14 |     user: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `process_message` is never used
[INFO] [stdout]   --> src/bin/server.rs:36:18
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl Session {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub async fn process_message(&mut self, message: Message) -> Result<()> {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.18s
[INFO] running `Command { std: "docker" "inspect" "1af7a60d93e4668ab23fa69e929e2a5609ae66331a493d8b20bb8a25867cf345", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1af7a60d93e4668ab23fa69e929e2a5609ae66331a493d8b20bb8a25867cf345", kill_on_drop: false }`
[INFO] [stdout] 1af7a60d93e4668ab23fa69e929e2a5609ae66331a493d8b20bb8a25867cf345