[INFO] cloning repository https://github.com/kobutri/nats_benchmark
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kobutri/nats_benchmark" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkobutri%2Fnats_benchmark", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkobutri%2Fnats_benchmark'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cb9297064c86b1d5669a9115f4cc9ff1e65208e4
[INFO] testing kobutri/nats_benchmark 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%2Fkobutri%2Fnats_benchmark" "/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/kobutri/nats_benchmark
[INFO] finished tweaking git repo https://github.com/kobutri/nats_benchmark
[INFO] tweaked toml for git repo https://github.com/kobutri/nats_benchmark written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kobutri/nats_benchmark 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/kobutri/nats_benchmark 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 }`
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[INFO] [stdout] d54813496379cca8d0a57ad660dc701c3583dc022b656f7dd7df7b27178efdca
[INFO] running `Command { std: "docker" "start" "-a" "d54813496379cca8d0a57ad660dc701c3583dc022b656f7dd7df7b27178efdca", kill_on_drop: false }`
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[INFO] [stdout] b8cad36b4cda1db4e78f29f8eaceb2b1273c7be6924a63eb8df90c48e73a947a
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[INFO] [stderr]    Compiling tokio v1.45.1
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[INFO] [stderr]    Compiling tokio-util v0.7.15
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[INFO] [stderr]    Compiling async-nats v0.41.0
[INFO] [stderr]    Compiling receiver v0.1.0 (/opt/rustwide/workdir/receiver)
[INFO] [stderr]    Compiling sender v0.1.0 (/opt/rustwide/workdir/sender)
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]  --> sender/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rand::Rng;
[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: `rand::Rng`
[INFO] [stdout]  --> receiver/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use rand::Rng;
[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 variable: `i`
[INFO] [stdout]   --> sender/src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     for i in 0..args.pool_size {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elapsed`
[INFO] [stdout]    --> receiver/src/main.rs:593:25
[INFO] [stdout]     |
[INFO] [stdout] 593 |                     let elapsed = last_report.elapsed().as_secs_f64();
[INFO] [stdout]     |                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_elapsed`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> receiver/src/main.rs:520:9
[INFO] [stdout]     |
[INFO] [stdout] 520 |     for i in 0..args.pool_size {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `messages` is never read
[INFO] [stdout]   --> receiver/src/main.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct StreamStats {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] 76 |     messages: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StreamStats` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `update` is never used
[INFO] [stdout]   --> receiver/src/main.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | impl ThroughputData {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 99 |     fn update(&mut self, current_throughput: f64, total_messages: u64) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 37s
[INFO] running `Command { std: "docker" "inspect" "b8cad36b4cda1db4e78f29f8eaceb2b1273c7be6924a63eb8df90c48e73a947a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8cad36b4cda1db4e78f29f8eaceb2b1273c7be6924a63eb8df90c48e73a947a", kill_on_drop: false }`
[INFO] [stdout] b8cad36b4cda1db4e78f29f8eaceb2b1273c7be6924a63eb8df90c48e73a947a
[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] c539883a54b0285139e241d868f9d3f4c322f9a576857c8b3cb83cf87db61034
[INFO] running `Command { std: "docker" "start" "-a" "c539883a54b0285139e241d868f9d3f4c322f9a576857c8b3cb83cf87db61034", kill_on_drop: false }`
[INFO] [stderr]    Compiling receiver v0.1.0 (/opt/rustwide/workdir/receiver)
[INFO] [stderr]    Compiling sender v0.1.0 (/opt/rustwide/workdir/sender)
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]  --> sender/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rand::Rng;
[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: `rand::Rng`
[INFO] [stdout]  --> receiver/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use rand::Rng;
[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 variable: `i`
[INFO] [stdout]   --> sender/src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     for i in 0..args.pool_size {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elapsed`
[INFO] [stdout]    --> receiver/src/main.rs:593:25
[INFO] [stdout]     |
[INFO] [stdout] 593 |                     let elapsed = last_report.elapsed().as_secs_f64();
[INFO] [stdout]     |                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_elapsed`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> receiver/src/main.rs:520:9
[INFO] [stdout]     |
[INFO] [stdout] 520 |     for i in 0..args.pool_size {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `messages` is never read
[INFO] [stdout]   --> receiver/src/main.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct StreamStats {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] 76 |     messages: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StreamStats` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `update` is never used
[INFO] [stdout]   --> receiver/src/main.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | impl ThroughputData {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 99 |     fn update(&mut self, current_throughput: f64, total_messages: u64) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "c539883a54b0285139e241d868f9d3f4c322f9a576857c8b3cb83cf87db61034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c539883a54b0285139e241d868f9d3f4c322f9a576857c8b3cb83cf87db61034", kill_on_drop: false }`
[INFO] [stdout] c539883a54b0285139e241d868f9d3f4c322f9a576857c8b3cb83cf87db61034
[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] 19f344d6f1bb57bcbc16e7702c415e190436c6ec91a845cd40cdcadf66a2b1da
[INFO] running `Command { std: "docker" "start" "-a" "19f344d6f1bb57bcbc16e7702c415e190436c6ec91a845cd40cdcadf66a2b1da", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]  --> receiver/src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use rand::Rng;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `elapsed`
[INFO] [stderr]    --> receiver/src/main.rs:593:25
[INFO] [stderr]     |
[INFO] [stderr] 593 |                     let elapsed = last_report.elapsed().as_secs_f64();
[INFO] [stderr]     |                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_elapsed`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> receiver/src/main.rs:520:9
[INFO] [stderr]     |
[INFO] [stderr] 520 |     for i in 0..args.pool_size {
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: field `messages` is never read
[INFO] [stderr]   --> receiver/src/main.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 75 | struct StreamStats {
[INFO] [stderr]    |        ----------- field in this struct
[INFO] [stderr] 76 |     messages: u64,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `StreamStats` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `update` is never used
[INFO] [stderr]   --> receiver/src/main.rs:99:8
[INFO] [stderr]    |
[INFO] [stderr] 80 | impl ThroughputData {
[INFO] [stderr]    | ------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 99 |     fn update(&mut self, current_throughput: f64, total_messages: u64) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]  --> sender/src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::Rng;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> sender/src/main.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     for i in 0..args.pool_size {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `receiver` (bin "receiver" test) generated 5 warnings (run `cargo fix --bin "receiver" -p receiver --tests` to apply 3 suggestions)
[INFO] [stderr] warning: `sender` (bin "sender" test) generated 2 warnings (run `cargo fix --bin "sender" -p sender --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/receiver-1dc14f5554526166)
[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] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/sender-d707150026a36c6c)
[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" "19f344d6f1bb57bcbc16e7702c415e190436c6ec91a845cd40cdcadf66a2b1da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19f344d6f1bb57bcbc16e7702c415e190436c6ec91a845cd40cdcadf66a2b1da", kill_on_drop: false }`
[INFO] [stdout] 19f344d6f1bb57bcbc16e7702c415e190436c6ec91a845cd40cdcadf66a2b1da
