[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 master#7f5a42b073dc2bee2aa625052eb066ee07072048 for pr-78991
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fievaskrabutena%2Frustycable" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ievaskrabutena/rustycable on toolchain 7f5a42b073dc2bee2aa625052eb066ee07072048
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "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-4/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" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "fetch" "--locked" "--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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 498e2aa1f9822c2587f5f5a1f4e00c1eaee4c0c1bd127b1339d768d5311a72e2
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[INFO] running `Command { std: "docker" "start" "-a" "498e2aa1f9822c2587f5f5a1f4e00c1eaee4c0c1bd127b1339d768d5311a72e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "498e2aa1f9822c2587f5f5a1f4e00c1eaee4c0c1bd127b1339d768d5311a72e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "498e2aa1f9822c2587f5f5a1f4e00c1eaee4c0c1bd127b1339d768d5311a72e2", kill_on_drop: false }`
[INFO] [stdout] 498e2aa1f9822c2587f5f5a1f4e00c1eaee4c0c1bd127b1339d768d5311a72e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 554f715b1d4c5b4fb4b756746eb29e2eaad2749968ef669bb19fdeb53f967193
[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" "554f715b1d4c5b4fb4b756746eb29e2eaad2749968ef669bb19fdeb53f967193", kill_on_drop: false }`
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[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 1m 57s
[INFO] running `Command { std: "docker" "inspect" "554f715b1d4c5b4fb4b756746eb29e2eaad2749968ef669bb19fdeb53f967193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "554f715b1d4c5b4fb4b756746eb29e2eaad2749968ef669bb19fdeb53f967193", kill_on_drop: false }`
[INFO] [stdout] 554f715b1d4c5b4fb4b756746eb29e2eaad2749968ef669bb19fdeb53f967193