[INFO] fetching crate phoenix-channels 0.1.4...
[INFO] checking phoenix-channels-0.1.4 against master#2e5723137b2b88368d018b262a0a823a1423131b for pr-78935-1
[INFO] extracting crate phoenix-channels 0.1.4 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate phoenix-channels 0.1.4 on toolchain 2e5723137b2b88368d018b262a0a823a1423131b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2e5723137b2b88368d018b262a0a823a1423131b" "read-manifest" "--manifest-path" "Cargo.toml", 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-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2e5723137b2b88368d018b262a0a823a1423131b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2e5723137b2b88368d018b262a0a823a1423131b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2e5723137b2b88368d018b262a0a823a1423131b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c57afe17e82626d1d50e230fee7a97d10f1cda9369d7249c4c5f4824f6e540d1
[INFO] running `Command { std: "docker" "start" "-a" "c57afe17e82626d1d50e230fee7a97d10f1cda9369d7249c4c5f4824f6e540d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c57afe17e82626d1d50e230fee7a97d10f1cda9369d7249c4c5f4824f6e540d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c57afe17e82626d1d50e230fee7a97d10f1cda9369d7249c4c5f4824f6e540d1", kill_on_drop: false }`
[INFO] [stdout] c57afe17e82626d1d50e230fee7a97d10f1cda9369d7249c4c5f4824f6e540d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2e5723137b2b88368d018b262a0a823a1423131b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 80a30e00377d43bb4356ba8692e3336a8b9c8a31bc65610c92af1c0766ebedc4
[INFO] running `Command { std: "docker" "start" "-a" "80a30e00377d43bb4356ba8692e3336a8b9c8a31bc65610c92af1c0766ebedc4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking slog-scope v4.3.0
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]     Checking slog-stdlog v4.1.0
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking openssl-sys v0.9.58
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking net2 v0.2.36
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking openssl v0.10.30
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking native-tls v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]     Checking tokio-tls v0.2.1
[INFO] [stderr]     Checking websocket v0.23.0
[INFO] [stderr]     Checking serde_json v1.0.60
[INFO] [stderr]     Checking 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]    |                                           ^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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]    |                                           ^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[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: 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 `std::result::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] [stdout] warning: unused `std::result::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 42.58s
[INFO] running `Command { std: "docker" "inspect" "80a30e00377d43bb4356ba8692e3336a8b9c8a31bc65610c92af1c0766ebedc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80a30e00377d43bb4356ba8692e3336a8b9c8a31bc65610c92af1c0766ebedc4", kill_on_drop: false }`
[INFO] [stdout] 80a30e00377d43bb4356ba8692e3336a8b9c8a31bc65610c92af1c0766ebedc4