[INFO] fetching crate tokio-stdout 0.1.0...
[INFO] checking tokio-stdout-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate tokio-stdout 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate tokio-stdout 0.1.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tokio-stdout 0.1.0
[INFO] finished tweaking crates.io crate tokio-stdout 0.1.0
[INFO] tweaked toml for crates.io crate tokio-stdout 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages
[INFO] [stderr]       Adding bytes v0.4.12 (latest: v1.6.0)
[INFO] [stderr]       Adding futures v0.1.31 (latest: v0.3.30)
[INFO] [stderr]       Adding slab v0.3.0 (latest: v0.4.9)
[INFO] [stderr]       Adding tokio-timer v0.1.2 (latest: v0.2.13)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-fmt-encoder v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6f48cc91beff22790401e6f8d1491e1fa5e115a85e0c90d668e1bef4cbddc88d
[INFO] running `Command { std: "docker" "start" "-a" "6f48cc91beff22790401e6f8d1491e1fa5e115a85e0c90d668e1bef4cbddc88d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f48cc91beff22790401e6f8d1491e1fa5e115a85e0c90d668e1bef4cbddc88d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f48cc91beff22790401e6f8d1491e1fa5e115a85e0c90d668e1bef4cbddc88d", kill_on_drop: false }`
[INFO] [stdout] 6f48cc91beff22790401e6f8d1491e1fa5e115a85e0c90d668e1bef4cbddc88d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 74ad37e6fe3ff3373aec069624f34b15223000a3562f56614443d3e13b9e755e
[INFO] running `Command { std: "docker" "start" "-a" "74ad37e6fe3ff3373aec069624f34b15223000a3562f56614443d3e13b9e755e", kill_on_drop: false }`
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking tokio-fmt-encoder v0.2.0
[INFO] [stderr]     Checking tokio-stdout v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tokio-timer v0.1.2
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> examples/timer.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Timer(TimerError),
[INFO] [stdout]    |     ----- ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Timer(()),
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> examples/timer.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Stdout(SendError<String>),
[INFO] [stdout]    |     ------ ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Stdout(()),
[INFO] [stdout]    |            ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `futures::stream::MapErr` in tuple element 0 that must be used
[INFO] [stdout]   --> examples/timer.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | /     Timer::default()
[INFO] [stdout] 25 | |         .interval(Duration::from_secs(1))
[INFO] [stdout] 26 | |         .map(|()| String::from("hello"))
[INFO] [stdout] 27 | |         .map_err(Error::Timer)
[INFO] [stdout] 28 | |         .forward(spawn_encoder_sink_unbounded(encoder).sink_map_err(Error::Stdout))
[INFO] [stdout] 29 | |         .wait()
[INFO] [stdout] 30 | |         .unwrap();
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `SinkMapErr` in tuple element 1 that must be used
[INFO] [stdout]   --> examples/timer.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | /     Timer::default()
[INFO] [stdout] 25 | |         .interval(Duration::from_secs(1))
[INFO] [stdout] 26 | |         .map(|()| String::from("hello"))
[INFO] [stdout] 27 | |         .map_err(Error::Timer)
[INFO] [stdout] 28 | |         .forward(spawn_encoder_sink_unbounded(encoder).sink_map_err(Error::Stdout))
[INFO] [stdout] 29 | |         .wait()
[INFO] [stdout] 30 | |         .unwrap();
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: sinks do nothing unless polled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "74ad37e6fe3ff3373aec069624f34b15223000a3562f56614443d3e13b9e755e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74ad37e6fe3ff3373aec069624f34b15223000a3562f56614443d3e13b9e755e", kill_on_drop: false }`
[INFO] [stdout] 74ad37e6fe3ff3373aec069624f34b15223000a3562f56614443d3e13b9e755e