[INFO] cloning repository https://github.com/ievaskrabutena/rustycable
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ievaskrabutena/rustycable" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fievaskrabutena%2Frustycable", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fievaskrabutena%2Frustycable'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a3a42eee63db462449e54303bb5ebb29733c55e1
[INFO] checking ievaskrabutena/rustycable against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fievaskrabutena%2Frustycable" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ievaskrabutena/rustycable on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ievaskrabutena/rustycable
[INFO] finished tweaking git repo https://github.com/ievaskrabutena/rustycable
[INFO] tweaked toml for git repo https://github.com/ievaskrabutena/rustycable written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/ievaskrabutena/rustycable already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 2aef3bd7e467421b4bb6055f0d47d31392fe361bd042046f12cbe124aa3a924c
[INFO] running `Command { std: "docker" "start" "-a" "2aef3bd7e467421b4bb6055f0d47d31392fe361bd042046f12cbe124aa3a924c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2aef3bd7e467421b4bb6055f0d47d31392fe361bd042046f12cbe124aa3a924c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2aef3bd7e467421b4bb6055f0d47d31392fe361bd042046f12cbe124aa3a924c", kill_on_drop: false }`
[INFO] [stdout] 2aef3bd7e467421b4bb6055f0d47d31392fe361bd042046f12cbe124aa3a924c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 630edbe1da9103d37ecb5f3c654aecdba158eed43514e4fe6a74e596079f9dcc
[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" "630edbe1da9103d37ecb5f3c654aecdba158eed43514e4fe6a74e596079f9dcc", kill_on_drop: false }`
[INFO] [stderr]     Checking tower-layer v0.3.0
[INFO] [stderr]    Compiling anyhow v1.0.28
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]     Checking futures-task v0.3.5
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[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking kv-log-macro v1.0.5
[INFO] [stderr]     Checking async-task v1.3.1
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]    Compiling async-trait v0.1.31
[INFO] [stderr]    Compiling async-stream-impl v0.2.1
[INFO] [stderr]     Checking mio v0.6.21
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[INFO] [stderr]     Checking tokio v0.2.18
[INFO] [stderr]     Checking async-std v1.5.0
[INFO] [stderr]    Compiling prost-derive v0.6.1
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[INFO] [stderr]     Checking combine v4.1.0
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking tower-limit v0.3.1
[INFO] [stderr]     Checking tower-balance v0.3.0
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[INFO] [stderr]     Checking serde v1.0.110
[INFO] [stderr]     Checking hyper v0.13.4
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[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]     Checking redis v0.16.0
[INFO] [stderr]     Checking rustycable v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         self.hub.send(HubAction::Add { session });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 | /         self.hub.send(HubAction::Subscribe {
[INFO] [stdout] 40 | |             session_id: session.uid.clone(),
[INFO] [stdout] 41 | |             stream,
[INFO] [stdout] 42 | |             identifier,
[INFO] [stdout] 43 | |         });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 | /         self.hub.send(HubAction::Unsubscribe {
[INFO] [stdout] 53 | |             session_id,
[INFO] [stdout] 54 | |             identifier,
[INFO] [stdout] 55 | |         });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         self.hub.send(HubAction::Remove { session });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 | /         self.hub.send(HubAction::Broadcast {
[INFO] [stdout] 66 | |             stream: message.stream,
[INFO] [stdout] 67 | |             data: message.data,
[INFO] [stdout] 68 | |         });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/server.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         app.add_session(session.clone());
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         self.hub.send(HubAction::Add { session });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 | /         self.hub.send(HubAction::Subscribe {
[INFO] [stdout] 40 | |             session_id: session.uid.clone(),
[INFO] [stdout] 41 | |             stream,
[INFO] [stdout] 42 | |             identifier,
[INFO] [stdout] 43 | |         });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 | /         self.hub.send(HubAction::Unsubscribe {
[INFO] [stdout] 53 | |             session_id,
[INFO] [stdout] 54 | |             identifier,
[INFO] [stdout] 55 | |         });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         self.hub.send(HubAction::Remove { session });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/rustycable.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 | /         self.hub.send(HubAction::Broadcast {
[INFO] [stdout] 66 | |             stream: message.stream,
[INFO] [stdout] 67 | |             data: message.data,
[INFO] [stdout] 68 | |         });
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/server.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         app.add_session(session.clone());
[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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 58.89s
[INFO] running `Command { std: "docker" "inspect" "630edbe1da9103d37ecb5f3c654aecdba158eed43514e4fe6a74e596079f9dcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "630edbe1da9103d37ecb5f3c654aecdba158eed43514e4fe6a74e596079f9dcc", kill_on_drop: false }`
[INFO] [stdout] 630edbe1da9103d37ecb5f3c654aecdba158eed43514e4fe6a74e596079f9dcc