[INFO] cloning repository https://github.com/cboudereau/rust-tokio-kata
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cboudereau/rust-tokio-kata" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcboudereau%2Frust-tokio-kata", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcboudereau%2Frust-tokio-kata'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b578c1c90b6c91c3f8354ff7b12e9444673dce90
[INFO] checking cboudereau/rust-tokio-kata against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcboudereau%2Frust-tokio-kata" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cboudereau/rust-tokio-kata on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cboudereau/rust-tokio-kata
[INFO] finished tweaking git repo https://github.com/cboudereau/rust-tokio-kata
[INFO] tweaked toml for git repo https://github.com/cboudereau/rust-tokio-kata written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/cboudereau/rust-tokio-kata already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7dd105a11dc27314dd160e1b2cad7f6ae366f7ecbffd372546bc57b5da96550
[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" "d7dd105a11dc27314dd160e1b2cad7f6ae366f7ecbffd372546bc57b5da96550", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7dd105a11dc27314dd160e1b2cad7f6ae366f7ecbffd372546bc57b5da96550", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7dd105a11dc27314dd160e1b2cad7f6ae366f7ecbffd372546bc57b5da96550", kill_on_drop: false }`
[INFO] [stdout] d7dd105a11dc27314dd160e1b2cad7f6ae366f7ecbffd372546bc57b5da96550
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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] c051bb29845a786239ccf50405c4de38b3f2d26c100d4c4c29de3ab06f373685
[INFO] running `Command { std: "docker" "start" "-a" "c051bb29845a786239ccf50405c4de38b3f2d26c100d4c4c29de3ab06f373685", kill_on_drop: false }`
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[INFO] [stderr]     Checking rust-tokio-kata v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `FutureExt`
[INFO] [stdout]  --> examples/etalab.rs:6:34
[INFO] [stdout]   |
[INFO] [stdout] 6 | use futures::{stream::StreamExt, FutureExt, TryStreamExt};
[INFO] [stdout]   |                                  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `downloads2`
[INFO] [stdout]    --> examples/etalab.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |     let downloads2 = futures::stream::iter(2016..=2020);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_downloads2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 20s
[INFO] running `Command { std: "docker" "inspect" "c051bb29845a786239ccf50405c4de38b3f2d26c100d4c4c29de3ab06f373685", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c051bb29845a786239ccf50405c4de38b3f2d26c100d4c4c29de3ab06f373685", kill_on_drop: false }`
[INFO] [stdout] c051bb29845a786239ccf50405c4de38b3f2d26c100d4c4c29de3ab06f373685