[INFO] cloning repository https://github.com/laoning2008/asyncmsg-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/laoning2008/asyncmsg-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaoning2008%2Fasyncmsg-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaoning2008%2Fasyncmsg-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf272a817c58dce597662cc48703b750845e5359
[INFO] testing laoning2008/asyncmsg-rust against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaoning2008%2Fasyncmsg-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/laoning2008/asyncmsg-rust
[INFO] finished tweaking git repo https://github.com/laoning2008/asyncmsg-rust
[INFO] tweaked toml for git repo https://github.com/laoning2008/asyncmsg-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/laoning2008/asyncmsg-rust on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/laoning2008/asyncmsg-rust 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 526b2a5786cfc1f99cf906ce4507c55d3a8daf225702f3d79538c9f2dbe1b535
[INFO] running `Command { std: "docker" "start" "-a" "526b2a5786cfc1f99cf906ce4507c55d3a8daf225702f3d79538c9f2dbe1b535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "526b2a5786cfc1f99cf906ce4507c55d3a8daf225702f3d79538c9f2dbe1b535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "526b2a5786cfc1f99cf906ce4507c55d3a8daf225702f3d79538c9f2dbe1b535", kill_on_drop: false }`
[INFO] [stdout] 526b2a5786cfc1f99cf906ce4507c55d3a8daf225702f3d79538c9f2dbe1b535
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e0c599ebd08d66cc1944391b9b11eff43c9ada600f29f1633fe8e972c67b8d6
[INFO] running `Command { std: "docker" "start" "-a" "2e0c599ebd08d66cc1944391b9b11eff43c9ada600f29f1633fe8e972c67b8d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]    Compiling futures-task v0.3.29
[INFO] [stderr]    Compiling smallvec v1.11.2
[INFO] [stderr]    Compiling pin-project-lite v0.2.13
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling futures-util v0.3.29
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling bytes v1.5.0
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]    Compiling futures-sink v0.3.29
[INFO] [stderr]    Compiling iana-time-zone v0.1.58
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]    Compiling mio v0.8.9
[INFO] [stderr]    Compiling socket2 v0.5.5
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling futures-io v0.3.29
[INFO] [stderr]    Compiling bytebuffer v2.2.0
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling chrono v0.4.31
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.29
[INFO] [stderr]    Compiling tokio v1.34.0
[INFO] [stderr]    Compiling tokio-util v0.7.10
[INFO] [stderr]    Compiling asyncmsg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp/server.rs:64:37
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub async fn send_packet(&self, mut packet: Packet) -> Result<()> {
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp/server.rs:78:55
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub async fn send_packet_and_wait_response(&self, mut packet: Packet, timeout_seconds: u64, max_tries: u32) -> Result<Packet> {
[INFO] [stdout]    |                                                       ----^^^^^^
[INFO] [stdout]    |                                                       |
[INFO] [stdout]    |                                                       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `req_receiver` is never read
[INFO] [stdout]    --> src/tcp/client.rs:113:65
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let mut req_receiver : Option<mpsc::Receiver<Packet>> = None;
[INFO] [stdout]     |                                                                 ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 118 |                 req_receiver = Some(receiver);
[INFO] [stdout]     |                 ------------ `req_receiver` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `req_receiver` is never read
[INFO] [stdout]    --> src/tcp/server.rs:107:65
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut req_receiver : Option<mpsc::Receiver<Packet>> = None;
[INFO] [stdout]     |                                                                 ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 112 |                 req_receiver = Some(receiver);
[INFO] [stdout]     |                 ------------ `req_receiver` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sender`
[INFO] [stdout]    --> src/tcp/server.rs:161:13
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let sender = conn_event_sender.clone();
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sender`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `conn_id`
[INFO] [stdout]    --> src/tcp/server.rs:192:45
[INFO] [stdout]     |
[INFO] [stdout] 192 |                 ConnectionEvent::GotRequest(conn_id, packet) => {
[INFO] [stdout]     |                                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_conn_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.53s
[INFO] running `Command { std: "docker" "inspect" "2e0c599ebd08d66cc1944391b9b11eff43c9ada600f29f1633fe8e972c67b8d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e0c599ebd08d66cc1944391b9b11eff43c9ada600f29f1633fe8e972c67b8d6", kill_on_drop: false }`
[INFO] [stdout] 2e0c599ebd08d66cc1944391b9b11eff43c9ada600f29f1633fe8e972c67b8d6
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3241c87eebb7af22203731685081a4b7a0a513e9e7e9c2d20fb5610730a71cb6
[INFO] running `Command { std: "docker" "start" "-a" "3241c87eebb7af22203731685081a4b7a0a513e9e7e9c2d20fb5610730a71cb6", kill_on_drop: false }`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp/server.rs:64:37
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub async fn send_packet(&self, mut packet: Packet) -> Result<()> {
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp/server.rs:78:55
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub async fn send_packet_and_wait_response(&self, mut packet: Packet, timeout_seconds: u64, max_tries: u32) -> Result<Packet> {
[INFO] [stdout]    |                                                       ----^^^^^^
[INFO] [stdout]    |                                                       |
[INFO] [stdout]    |                                                       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `req_receiver` is never read
[INFO] [stdout]    --> src/tcp/client.rs:113:65
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let mut req_receiver : Option<mpsc::Receiver<Packet>> = None;
[INFO] [stdout]     |                                                                 ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 118 |                 req_receiver = Some(receiver);
[INFO] [stdout]     |                 ------------ `req_receiver` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `req_receiver` is never read
[INFO] [stdout]    --> src/tcp/server.rs:107:65
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut req_receiver : Option<mpsc::Receiver<Packet>> = None;
[INFO] [stdout]     |                                                                 ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 112 |                 req_receiver = Some(receiver);
[INFO] [stdout]     |                 ------------ `req_receiver` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sender`
[INFO] [stdout]    --> src/tcp/server.rs:161:13
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let sender = conn_event_sender.clone();
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sender`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling asyncmsg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `conn_id`
[INFO] [stdout]    --> src/tcp/server.rs:192:45
[INFO] [stdout]     |
[INFO] [stdout] 192 |                 ConnectionEvent::GotRequest(conn_id, packet) => {
[INFO] [stdout]     |                                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_conn_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::runtime::Runtime`
[INFO] [stdout]  --> examples/tcp_client.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tokio::runtime::Runtime;
[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: `anyhow::Result`
[INFO] [stdout]  --> examples/tcp_client.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/tcp_client.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 |     handle.await;
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 85 |     let _ = handle.await;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp/server.rs:64:37
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub async fn send_packet(&self, mut packet: Packet) -> Result<()> {
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/tcp/server.rs:78:55
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub async fn send_packet_and_wait_response(&self, mut packet: Packet, timeout_seconds: u64, max_tries: u32) -> Result<Packet> {
[INFO] [stdout]    |                                                       ----^^^^^^
[INFO] [stdout]    |                                                       |
[INFO] [stdout]    |                                                       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/tcp_server.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 78 |     handle.await;
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let _ = handle.await;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `req_receiver` is never read
[INFO] [stdout]    --> src/tcp/client.rs:113:65
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let mut req_receiver : Option<mpsc::Receiver<Packet>> = None;
[INFO] [stdout]     |                                                                 ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 118 |                 req_receiver = Some(receiver);
[INFO] [stdout]     |                 ------------ `req_receiver` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `req_receiver` is never read
[INFO] [stdout]    --> src/tcp/server.rs:107:65
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut req_receiver : Option<mpsc::Receiver<Packet>> = None;
[INFO] [stdout]     |                                                                 ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 112 |                 req_receiver = Some(receiver);
[INFO] [stdout]     |                 ------------ `req_receiver` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sender`
[INFO] [stdout]    --> src/tcp/server.rs:161:13
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let sender = conn_event_sender.clone();
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sender`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `conn_id`
[INFO] [stdout]    --> src/tcp/server.rs:192:45
[INFO] [stdout]     |
[INFO] [stdout] 192 |                 ConnectionEvent::GotRequest(conn_id, packet) => {
[INFO] [stdout]     |                                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_conn_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.12s
[INFO] running `Command { std: "docker" "inspect" "3241c87eebb7af22203731685081a4b7a0a513e9e7e9c2d20fb5610730a71cb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3241c87eebb7af22203731685081a4b7a0a513e9e7e9c2d20fb5610730a71cb6", kill_on_drop: false }`
[INFO] [stdout] 3241c87eebb7af22203731685081a4b7a0a513e9e7e9c2d20fb5610730a71cb6
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2eaa4ca0b49aeb72f8774544c20c27dedc36f44afbed9a329fbdbb5fb1d526b2
[INFO] running `Command { std: "docker" "start" "-a" "2eaa4ca0b49aeb72f8774544c20c27dedc36f44afbed9a329fbdbb5fb1d526b2", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/tcp/server.rs:64:37
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub async fn send_packet(&self, mut packet: Packet) -> Result<()> {
[INFO] [stderr]    |                                     ----^^^^^^
[INFO] [stderr]    |                                     |
[INFO] [stderr]    |                                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/tcp/server.rs:78:55
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub async fn send_packet_and_wait_response(&self, mut packet: Packet, timeout_seconds: u64, max_tries: u32) -> Result<Packet> {
[INFO] [stderr]    |                                                       ----^^^^^^
[INFO] [stderr]    |                                                       |
[INFO] [stderr]    |                                                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `req_receiver` is never read
[INFO] [stderr]    --> src/tcp/client.rs:113:65
[INFO] [stderr]     |
[INFO] [stderr] 113 |         let mut req_receiver : Option<mpsc::Receiver<Packet>> = None;
[INFO] [stderr]     |                                                                 ^^^^ this value is reassigned later and never used
[INFO] [stderr] ...
[INFO] [stderr] 118 |                 req_receiver = Some(receiver);
[INFO] [stderr]     |                 ------------ `req_receiver` is overwritten here before the previous value is read
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `req_receiver` is never read
[INFO] [stderr]    --> src/tcp/server.rs:107:65
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let mut req_receiver : Option<mpsc::Receiver<Packet>> = None;
[INFO] [stderr]     |                                                                 ^^^^ this value is reassigned later and never used
[INFO] [stderr] ...
[INFO] [stderr] 112 |                 req_receiver = Some(receiver);
[INFO] [stderr]     |                 ------------ `req_receiver` is overwritten here before the previous value is read
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sender`
[INFO] [stderr]    --> src/tcp/server.rs:161:13
[INFO] [stderr]     |
[INFO] [stderr] 161 |         let sender = conn_event_sender.clone();
[INFO] [stderr]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sender`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `conn_id`
[INFO] [stderr]    --> src/tcp/server.rs:192:45
[INFO] [stderr]     |
[INFO] [stderr] 192 |                 ConnectionEvent::GotRequest(conn_id, packet) => {
[INFO] [stderr]     |                                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_conn_id`
[INFO] [stderr] 
[INFO] [stderr] warning: `asyncmsg` (lib) generated 6 warnings (run `cargo fix --lib -p asyncmsg` to apply 4 suggestions)
[INFO] [stderr] warning: `asyncmsg` (lib test) generated 6 warnings (6 duplicates)
[INFO] [stderr] warning: unused import: `tokio::runtime::Runtime`
[INFO] [stderr]  --> examples/tcp_client.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use tokio::runtime::Runtime;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `anyhow::Result`
[INFO] [stderr]  --> examples/tcp_client.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use anyhow::Result;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> examples/tcp_client.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     handle.await;
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 85 |     let _ = handle.await;
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> examples/tcp_server.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 78 |     handle.await;
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let _ = handle.await;
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `asyncmsg` (example "tcp_client") generated 3 warnings (run `cargo fix --example "tcp_client" -p asyncmsg` to apply 2 suggestions)
[INFO] [stderr] warning: `asyncmsg` (example "tcp_server") generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/asyncmsg-d42f1fb8a705801d)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/tcp_client_test.rs (/opt/rustwide/target/debug/deps/tcp_client_test-964f34e33b6df567)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests asyncmsg
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2eaa4ca0b49aeb72f8774544c20c27dedc36f44afbed9a329fbdbb5fb1d526b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eaa4ca0b49aeb72f8774544c20c27dedc36f44afbed9a329fbdbb5fb1d526b2", kill_on_drop: false }`
[INFO] [stdout] 2eaa4ca0b49aeb72f8774544c20c27dedc36f44afbed9a329fbdbb5fb1d526b2
