[INFO] fetching crate almost-raft 0.3.0...
[INFO] checking almost-raft-0.3.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate almost-raft 0.3.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate almost-raft 0.3.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate almost-raft 0.3.0
[INFO] finished tweaking crates.io crate almost-raft 0.3.0
[INFO] tweaked toml for crates.io crate almost-raft 0.3.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7d4373eacd8f86f59a1f5e39fd5ad67d64b04081e8940c10e7e333b52e73145
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f7d4373eacd8f86f59a1f5e39fd5ad67d64b04081e8940c10e7e333b52e73145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7d4373eacd8f86f59a1f5e39fd5ad67d64b04081e8940c10e7e333b52e73145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7d4373eacd8f86f59a1f5e39fd5ad67d64b04081e8940c10e7e333b52e73145", kill_on_drop: false }`
[INFO] [stdout] f7d4373eacd8f86f59a1f5e39fd5ad67d64b04081e8940c10e7e333b52e73145
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 571b0be7a3f7f834c10deadbd40dd1b39d81327bce2c014f1ca615b5184eba33
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "571b0be7a3f7f834c10deadbd40dd1b39d81327bce2c014f1ca615b5184eba33", kill_on_drop: false }`
[INFO] [stderr]     Checking ppv-lite86 v0.2.14
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]    Compiling tokio v1.12.0
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking tracing v0.1.29
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling tokio-macros v1.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]     Checking tokio-stream v0.1.7
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking serde_json v1.0.68
[INFO] [stderr]     Checking almost-raft v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:530:13
[INFO] [stdout]     |
[INFO] [stdout] 530 |             self.sender.send(msg).await;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:566:9
[INFO] [stdout]     |
[INFO] [stdout] 566 |         tx.send(Message::ControlAddNode(dummy)).await;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:568:9
[INFO] [stdout]     |
[INFO] [stdout] 568 |         tx.send(Message::ControlAddNode(dummy)).await;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:578:9
[INFO] [stdout]     |
[INFO] [stdout] 578 |         tx.send(Message::ControlAddNode(dummy)).await;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:631:9
[INFO] [stdout]     |
[INFO] [stdout] 631 | /         tx_to_raft
[INFO] [stdout] 632 | |             .send(Message::RequestVoteResponse {
[INFO] [stdout] 633 | |                 vote: true,
[INFO] [stdout] 634 | |                 term: 1,
[INFO] [stdout] 635 | |             })
[INFO] [stdout] 636 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:637:9
[INFO] [stdout]     |
[INFO] [stdout] 637 | /         tx_to_raft
[INFO] [stdout] 638 | |             .send(Message::RequestVoteResponse {
[INFO] [stdout] 639 | |                 vote: true,
[INFO] [stdout] 640 | |                 term: 1,
[INFO] [stdout] 641 | |             })
[INFO] [stdout] 642 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:643:9
[INFO] [stdout]     |
[INFO] [stdout] 643 | /         tx_to_raft
[INFO] [stdout] 644 | |             .send(Message::RequestVoteResponse {
[INFO] [stdout] 645 | |                 vote: true,
[INFO] [stdout] 646 | |                 term: 1,
[INFO] [stdout] 647 | |             })
[INFO] [stdout] 648 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:701:9
[INFO] [stdout]     |
[INFO] [stdout] 701 | /         tx_to_raft
[INFO] [stdout] 702 | |             .send(Message::RequestVoteResponse {
[INFO] [stdout] 703 | |                 vote: true,
[INFO] [stdout] 704 | |                 term: 1,
[INFO] [stdout] 705 | |             })
[INFO] [stdout] 706 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:730:13
[INFO] [stdout]     |
[INFO] [stdout] 730 | /             tx_to_raft
[INFO] [stdout] 731 | |                 .send(Message::RequestVoteResponse {
[INFO] [stdout] 732 | |                     vote: true,
[INFO] [stdout] 733 | |                     term: 2,
[INFO] [stdout] 734 | |                 })
[INFO] [stdout] 735 | |                 .await;
[INFO] [stdout]     | |_______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:791:9
[INFO] [stdout]     |
[INFO] [stdout] 791 | /         tx_to_raft_node_1
[INFO] [stdout] 792 | |             .send(Message::ControlAddNode(new_node(
[INFO] [stdout] 793 | |                 self_id_2.as_str(),
[INFO] [stdout] 794 | |                 tx_to_raft_node_2.clone(),
[INFO] [stdout] 795 | |             )))
[INFO] [stdout] 796 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:797:9
[INFO] [stdout]     |
[INFO] [stdout] 797 | /         tx_to_raft_node_1
[INFO] [stdout] 798 | |             .send(Message::ControlAddNode(new_node(
[INFO] [stdout] 799 | |                 self_id_3.as_str(),
[INFO] [stdout] 800 | |                 tx_to_raft_node_3.clone(),
[INFO] [stdout] 801 | |             )))
[INFO] [stdout] 802 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:804:9
[INFO] [stdout]     |
[INFO] [stdout] 804 | /         tx_to_raft_node_2
[INFO] [stdout] 805 | |             .send(Message::ControlAddNode(new_node(
[INFO] [stdout] 806 | |                 self_id_1.as_str(),
[INFO] [stdout] 807 | |                 tx_to_raft_node_1.clone(),
[INFO] [stdout] 808 | |             )))
[INFO] [stdout] 809 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:810:9
[INFO] [stdout]     |
[INFO] [stdout] 810 | /         tx_to_raft_node_2
[INFO] [stdout] 811 | |             .send(Message::ControlAddNode(new_node(
[INFO] [stdout] 812 | |                 self_id_3.as_str(),
[INFO] [stdout] 813 | |                 tx_to_raft_node_3.clone(),
[INFO] [stdout] 814 | |             )))
[INFO] [stdout] 815 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:816:9
[INFO] [stdout]     |
[INFO] [stdout] 816 | /         tx_to_raft_node_3
[INFO] [stdout] 817 | |             .send(Message::ControlAddNode(new_node(
[INFO] [stdout] 818 | |                 self_id_1.as_str(),
[INFO] [stdout] 819 | |                 tx_to_raft_node_1.clone(),
[INFO] [stdout] 820 | |             )))
[INFO] [stdout] 821 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/election/mod.rs:822:9
[INFO] [stdout]     |
[INFO] [stdout] 822 | /         tx_to_raft_node_3
[INFO] [stdout] 823 | |             .send(Message::ControlAddNode(new_node(
[INFO] [stdout] 824 | |                 self_id_2.as_str(),
[INFO] [stdout] 825 | |                 tx_to_raft_node_2.clone(),
[INFO] [stdout] 826 | |             )))
[INFO] [stdout] 827 | |             .await;
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 56.85s
[INFO] running `Command { std: "docker" "inspect" "571b0be7a3f7f834c10deadbd40dd1b39d81327bce2c014f1ca615b5184eba33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "571b0be7a3f7f834c10deadbd40dd1b39d81327bce2c014f1ca615b5184eba33", kill_on_drop: false }`
[INFO] [stdout] 571b0be7a3f7f834c10deadbd40dd1b39d81327bce2c014f1ca615b5184eba33
