[INFO] cloning repository https://github.com/akramab/paxos-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/akramab/paxos-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fakramab%2Fpaxos-rust", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a4840f281195e3a07a5bf779641889f6d93b9e19
[INFO] checking akramab/paxos-rust against master#fe348cd1a8e0fa445b772393147ed865904dcd4d for pr-139587-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fakramab%2Fpaxos-rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/akramab/paxos-rust on toolchain fe348cd1a8e0fa445b772393147ed865904dcd4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fe348cd1a8e0fa445b772393147ed865904dcd4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/akramab/paxos-rust
[INFO] finished tweaking git repo https://github.com/akramab/paxos-rust
[INFO] tweaked toml for git repo https://github.com/akramab/paxos-rust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/akramab/paxos-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" "+fe348cd1a8e0fa445b772393147ed865904dcd4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+fe348cd1a8e0fa445b772393147ed865904dcd4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "b59c29a24427e51d9ce3cb97ca9ea55eb957425c38edea977c5c1a8e45751510", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b59c29a24427e51d9ce3cb97ca9ea55eb957425c38edea977c5c1a8e45751510", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b59c29a24427e51d9ce3cb97ca9ea55eb957425c38edea977c5c1a8e45751510", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+fe348cd1a8e0fa445b772393147ed865904dcd4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 537df433b26e201db8e6ac2cbb5905943bc68facbbbfb95ac9fbdee69c5ff07b
[INFO] running `Command { std: "docker" "start" "-a" "537df433b26e201db8e6ac2cbb5905943bc68facbbbfb95ac9fbdee69c5ff07b", kill_on_drop: false }`
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[INFO] [stdout] warning: variable `last_heartbeat` is assigned to, but never used
[INFO] [stdout]   --> src/follower.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut last_heartbeat = Instant::now();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_last_heartbeat` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last_heartbeat` is never read
[INFO] [stdout]   --> src/follower.rs:38:33
[INFO] [stdout]    |
[INFO] [stdout] 38 | ...                   last_heartbeat = Instant::now(); // Update last heartbeat received time
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `src_addr`
[INFO] [stdout]   --> src/follower.rs:47:26
[INFO] [stdout]    |
[INFO] [stdout] 47 |             Ok((message, src_addr)) = receive_message(&socket) => {
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_src_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `last_heartbeat` is assigned to, but never used
[INFO] [stdout]   --> src/follower.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut last_heartbeat = Instant::now();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_last_heartbeat` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last_heartbeat` is never read
[INFO] [stdout]   --> src/follower.rs:38:33
[INFO] [stdout]    |
[INFO] [stdout] 38 | ...                   last_heartbeat = Instant::now(); // Update last heartbeat received time
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `src_addr`
[INFO] [stdout]   --> src/follower.rs:47:26
[INFO] [stdout]    |
[INFO] [stdout] 47 |             Ok((message, src_addr)) = receive_message(&socket) => {
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_src_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `src_addr`
[INFO] [stdout]   --> src/leader.rs:35:26
[INFO] [stdout]    |
[INFO] [stdout] 35 |             Ok((message, src_addr)) = receive_message(&socket) => {
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_src_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `src_addr`
[INFO] [stdout]   --> src/leader.rs:35:26
[INFO] [stdout]    |
[INFO] [stdout] 35 |             Ok((message, src_addr)) = receive_message(&socket) => {
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_src_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ack_tx`
[INFO] [stdout]   --> src/main.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let (ack_tx, ack_rx) = mpsc::channel(32); // Create both sender and receiver
[INFO] [stdout]    |          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_ack_tx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ack_tx`
[INFO] [stdout]   --> src/main.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let (ack_tx, ack_rx) = mpsc::channel(32); // Create both sender and receiver
[INFO] [stdout]    |          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_ack_tx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 51.36s
[INFO] running `Command { std: "docker" "inspect" "537df433b26e201db8e6ac2cbb5905943bc68facbbbfb95ac9fbdee69c5ff07b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "537df433b26e201db8e6ac2cbb5905943bc68facbbbfb95ac9fbdee69c5ff07b", kill_on_drop: false }`
[INFO] [stdout] 537df433b26e201db8e6ac2cbb5905943bc68facbbbfb95ac9fbdee69c5ff07b