[INFO] fetching crate tokio-stdout 0.1.0...
[INFO] checking tokio-stdout-0.1.0 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate tokio-stdout 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate tokio-stdout 0.1.0 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "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-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "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] 45a71000620c8e98ae146eac47e54ca252b811f5968195e6873b5ff9e7113405
[INFO] running `Command { std: "docker" "start" "-a" "45a71000620c8e98ae146eac47e54ca252b811f5968195e6873b5ff9e7113405", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45a71000620c8e98ae146eac47e54ca252b811f5968195e6873b5ff9e7113405", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45a71000620c8e98ae146eac47e54ca252b811f5968195e6873b5ff9e7113405", kill_on_drop: false }`
[INFO] [stdout] 45a71000620c8e98ae146eac47e54ca252b811f5968195e6873b5ff9e7113405
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91a873cf49741cbef69f4bfc491374f900a6925496ed7a27105ca4fa677e8bc3
[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" "91a873cf49741cbef69f4bfc491374f900a6925496ed7a27105ca4fa677e8bc3", 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: 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: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: streams do nothing unless polled
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "91a873cf49741cbef69f4bfc491374f900a6925496ed7a27105ca4fa677e8bc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91a873cf49741cbef69f4bfc491374f900a6925496ed7a27105ca4fa677e8bc3", kill_on_drop: false }`
[INFO] [stdout] 91a873cf49741cbef69f4bfc491374f900a6925496ed7a27105ca4fa677e8bc3