[INFO] fetching crate phoenix-channels 0.1.4... [INFO] testing phoenix-channels-0.1.4 against beta-2022-02-22 for beta-1.60-1 [INFO] extracting crate phoenix-channels 0.1.4 into /workspace/builds/worker-11/source [INFO] validating manifest of crates.io crate phoenix-channels 0.1.4 on toolchain beta-2022-02-22 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate phoenix-channels 0.1.4 [INFO] finished tweaking crates.io crate phoenix-channels 0.1.4 [INFO] tweaked toml for crates.io crate phoenix-channels 0.1.4 written to /workspace/builds/worker-11/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 24065a4779e7ef5067664bd47545ff300f6bf4e878d7c1b2a49dd6aaeb5598f4 [INFO] running `Command { std: "docker" "start" "-a" "24065a4779e7ef5067664bd47545ff300f6bf4e878d7c1b2a49dd6aaeb5598f4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "24065a4779e7ef5067664bd47545ff300f6bf4e878d7c1b2a49dd6aaeb5598f4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "24065a4779e7ef5067664bd47545ff300f6bf4e878d7c1b2a49dd6aaeb5598f4", kill_on_drop: false }` [INFO] [stdout] 24065a4779e7ef5067664bd47545ff300f6bf4e878d7c1b2a49dd6aaeb5598f4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 746e5a10c7e43072933a2102d6bfec77eb1c062d7e33c8f72a705821ffa35c11 [INFO] running `Command { std: "docker" "start" "-a" "746e5a10c7e43072933a2102d6bfec77eb1c062d7e33c8f72a705821ffa35c11", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.1.0 [INFO] [stderr] Compiling libc v0.2.119 [INFO] [stderr] Compiling cfg-if v1.0.0 [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling byteorder v1.4.3 [INFO] [stderr] Compiling rand_core v0.4.2 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling cc v1.0.73 [INFO] [stderr] Compiling pkg-config v0.3.24 [INFO] [stderr] Compiling futures v0.1.31 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling tinyvec_macros v0.1.0 [INFO] [stderr] Compiling scopeguard v1.1.0 [INFO] [stderr] Compiling version_check v0.1.5 [INFO] [stderr] Compiling proc-macro2 v1.0.36 [INFO] [stderr] Compiling foreign-types-shared v0.1.1 [INFO] [stderr] Compiling openssl v0.10.38 [INFO] [stderr] Compiling bitflags v1.3.2 [INFO] [stderr] Compiling matches v0.1.9 [INFO] [stderr] Compiling httparse v1.6.0 [INFO] [stderr] Compiling unicode-xid v0.2.2 [INFO] [stderr] Compiling slog v2.7.0 [INFO] [stderr] Compiling native-tls v0.2.8 [INFO] [stderr] Compiling unicode-bidi v0.3.7 [INFO] [stderr] Compiling slab v0.4.5 [INFO] [stderr] Compiling once_cell v1.9.0 [INFO] [stderr] Compiling fnv v1.0.7 [INFO] [stderr] Compiling safemem v0.3.3 [INFO] [stderr] Compiling percent-encoding v1.0.1 [INFO] [stderr] Compiling serde v1.0.136 [INFO] [stderr] Compiling syn v1.0.86 [INFO] [stderr] Compiling openssl-probe v0.1.5 [INFO] [stderr] Compiling sha1_smol v1.0.0 [INFO] [stderr] Compiling traitobject v0.1.0 [INFO] [stderr] Compiling typeable v0.1.2 [INFO] [stderr] Compiling serde_json v1.0.79 [INFO] [stderr] Compiling serde_derive v1.0.136 [INFO] [stderr] Compiling language-tags v0.2.2 [INFO] [stderr] Compiling arc-swap v1.5.0 [INFO] [stderr] Compiling ryu v1.0.9 [INFO] [stderr] Compiling itoa v1.0.1 [INFO] [stderr] Compiling autocfg v0.1.8 [INFO] [stderr] Compiling tinyvec v1.5.1 [INFO] [stderr] Compiling foreign-types v0.3.2 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Compiling rand_core v0.3.1 [INFO] [stderr] Compiling base64 v0.9.3 [INFO] [stderr] Compiling rand_jitter v0.1.4 [INFO] [stderr] Compiling sha1 v0.6.1 [INFO] [stderr] Compiling base64 v0.10.1 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Compiling lock_api v0.3.4 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling log v0.3.9 [INFO] [stderr] Compiling rand_isaac v0.1.1 [INFO] [stderr] Compiling rand_hc v0.1.0 [INFO] [stderr] Compiling rand_xorshift v0.1.1 [INFO] [stderr] Compiling mime v0.2.6 [INFO] [stderr] Compiling unicase v1.4.2 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Compiling smallvec v0.6.14 [INFO] [stderr] Compiling openssl-sys v0.9.72 [INFO] [stderr] Compiling unicode-normalization v0.1.19 [INFO] [stderr] Compiling slog-scope v4.4.0 [INFO] [stderr] Compiling tokio-sync v0.1.8 [INFO] [stderr] Compiling parking_lot_core v0.6.2 [INFO] [stderr] Compiling parking_lot v0.9.0 [INFO] [stderr] Compiling iovec v0.1.4 [INFO] [stderr] Compiling num_cpus v1.13.1 [INFO] [stderr] Compiling net2 v0.2.37 [INFO] [stderr] Compiling rand_os v0.1.3 [INFO] [stderr] Compiling time v0.1.44 [INFO] [stderr] Compiling slog-stdlog v4.1.0 [INFO] [stderr] Compiling quote v1.0.15 [INFO] [stderr] Compiling bytes v0.4.12 [INFO] [stderr] Compiling mio v0.6.23 [INFO] [stderr] Compiling tokio-io v0.1.13 [INFO] [stderr] Compiling tokio-codec v0.1.2 [INFO] [stderr] Compiling tokio-executor v0.1.10 [INFO] [stderr] Compiling idna v0.1.5 [INFO] [stderr] Compiling tokio-reactor v0.1.12 [INFO] [stderr] Compiling tokio-tcp v0.1.4 [INFO] [stderr] Compiling url v1.7.2 [INFO] [stderr] Compiling hyper v0.10.16 [INFO] [stderr] Compiling tokio-tls v0.2.1 [INFO] [stderr] Compiling websocket v0.23.0 [INFO] [stderr] Compiling phoenix-channels v0.1.4 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/sender.rs:44:43 [INFO] [stdout] | [INFO] [stdout] 44 | pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 44 - pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stdout] 44 + pub fn heartbeat(&mut self) -> Result { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `logger` [INFO] [stdout] --> src/client.rs:72:5 [INFO] [stdout] | [INFO] [stdout] 72 | logger: slog::Logger, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `logger` [INFO] [stdout] --> src/receiver.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | logger: slog::Logger, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/client.rs:107:17 [INFO] [stdout] | [INFO] [stdout] 107 | sender.heartbeat(); [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: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 15.24s [INFO] running `Command { std: "docker" "inspect" "746e5a10c7e43072933a2102d6bfec77eb1c062d7e33c8f72a705821ffa35c11", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "746e5a10c7e43072933a2102d6bfec77eb1c062d7e33c8f72a705821ffa35c11", kill_on_drop: false }` [INFO] [stdout] 746e5a10c7e43072933a2102d6bfec77eb1c062d7e33c8f72a705821ffa35c11 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 22e0ccdaf9e27f956f59d5462e10f1bb48143adb1442c25abdefa6c7ef316261 [INFO] running `Command { std: "docker" "start" "-a" "22e0ccdaf9e27f956f59d5462e10f1bb48143adb1442c25abdefa6c7ef316261", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/sender.rs:44:43 [INFO] [stdout] | [INFO] [stdout] 44 | pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 44 - pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stdout] 44 + pub fn heartbeat(&mut self) -> Result { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `logger` [INFO] [stdout] --> src/client.rs:72:5 [INFO] [stdout] | [INFO] [stdout] 72 | logger: slog::Logger, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `logger` [INFO] [stdout] --> src/receiver.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | logger: slog::Logger, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/client.rs:107:17 [INFO] [stdout] | [INFO] [stdout] 107 | sender.heartbeat(); [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: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling phoenix-channels v0.1.4 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/sender.rs:44:43 [INFO] [stdout] | [INFO] [stdout] 44 | pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 44 - pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stdout] 44 + pub fn heartbeat(&mut self) -> Result { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `logger` [INFO] [stdout] --> src/client.rs:72:5 [INFO] [stdout] | [INFO] [stdout] 72 | logger: slog::Logger, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `logger` [INFO] [stdout] --> src/receiver.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | logger: slog::Logger, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/client.rs:107:17 [INFO] [stdout] | [INFO] [stdout] 107 | sender.heartbeat(); [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: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.99s [INFO] running `Command { std: "docker" "inspect" "22e0ccdaf9e27f956f59d5462e10f1bb48143adb1442c25abdefa6c7ef316261", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "22e0ccdaf9e27f956f59d5462e10f1bb48143adb1442c25abdefa6c7ef316261", kill_on_drop: false }` [INFO] [stdout] 22e0ccdaf9e27f956f59d5462e10f1bb48143adb1442c25abdefa6c7ef316261 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 419f57bbf3cdc7b987de0a58cedd814cf4d5c161ef83ec2aeca171dbcaec7ce2 [INFO] running `Command { std: "docker" "start" "-a" "419f57bbf3cdc7b987de0a58cedd814cf4d5c161ef83ec2aeca171dbcaec7ce2", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stdout] [INFO] [stderr] warning: unnecessary parentheses around type [INFO] [stdout] running 0 tests [INFO] [stderr] --> src/sender.rs:44:43 [INFO] [stdout] [INFO] [stderr] | [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stderr] 44 | pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stdout] [INFO] [stderr] | ^ ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] 44 - pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stderr] 44 + pub fn heartbeat(&mut self) -> Result { [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: field is never read: `logger` [INFO] [stderr] --> src/client.rs:72:5 [INFO] [stderr] | [INFO] [stderr] 72 | logger: slog::Logger, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: field is never read: `logger` [INFO] [stderr] --> src/receiver.rs:11:5 [INFO] [stderr] | [INFO] [stderr] 11 | logger: slog::Logger, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `Result` that must be used [INFO] [stderr] --> src/client.rs:107:17 [INFO] [stderr] | [INFO] [stderr] 107 | sender.heartbeat(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: `phoenix-channels` (lib) generated 4 warnings [INFO] [stderr] warning: `phoenix-channels` (lib test) generated 4 warnings (4 duplicates) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.47s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/phoenix_channels-96998ed9250a3fac) [INFO] [stderr] Doc-tests phoenix-channels [INFO] [stderr] warning: unnecessary parentheses around type [INFO] [stderr] --> /opt/rustwide/workdir/src/sender.rs:44:43 [INFO] [stderr] | [INFO] [stderr] 44 | pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stderr] | ^ ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] 44 - pub fn heartbeat(&mut self) -> Result<(u32), MessageError> { [INFO] [stderr] 44 + pub fn heartbeat(&mut self) -> Result { [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [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" "419f57bbf3cdc7b987de0a58cedd814cf4d5c161ef83ec2aeca171dbcaec7ce2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "419f57bbf3cdc7b987de0a58cedd814cf4d5c161ef83ec2aeca171dbcaec7ce2", kill_on_drop: false }` [INFO] [stdout] 419f57bbf3cdc7b987de0a58cedd814cf4d5c161ef83ec2aeca171dbcaec7ce2