[INFO] cloning repository https://github.com/ericmeyers/collatz_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ericmeyers/collatz_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fericmeyers%2Fcollatz_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fericmeyers%2Fcollatz_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8f3182284f26896ecf06cc83cd82e0a4a05d5e85
[INFO] checking ericmeyers/collatz_rust against master#fce0e74720d199eb7839fdb51af35ac5226da178 for pr-145262
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fericmeyers%2Fcollatz_rust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ericmeyers/collatz_rust
[INFO] finished tweaking git repo https://github.com/ericmeyers/collatz_rust
[INFO] tweaked toml for git repo https://github.com/ericmeyers/collatz_rust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ericmeyers/collatz_rust on toolchain fce0e74720d199eb7839fdb51af35ac5226da178
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fce0e74720d199eb7839fdb51af35ac5226da178" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ericmeyers/collatz_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fce0e74720d199eb7839fdb51af35ac5226da178" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] [stderr]   Downloaded tailcall v1.0.1
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+fce0e74720d199eb7839fdb51af35ac5226da178" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab38d8b4a998b9ebe931d435c0366b931776310606dce5a1985512415075a788
[INFO] running `Command { std: "docker" "start" "-a" "ab38d8b4a998b9ebe931d435c0366b931776310606dce5a1985512415075a788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab38d8b4a998b9ebe931d435c0366b931776310606dce5a1985512415075a788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab38d8b4a998b9ebe931d435c0366b931776310606dce5a1985512415075a788", kill_on_drop: false }`
[INFO] [stdout] ab38d8b4a998b9ebe931d435c0366b931776310606dce5a1985512415075a788
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+fce0e74720d199eb7839fdb51af35ac5226da178" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 59fefb95fa853bb3bd7eca18dfce2bbcd4039bb752e13e3cf286fc945eb1b499
[INFO] running `Command { std: "docker" "start" "-a" "59fefb95fa853bb3bd7eca18dfce2bbcd4039bb752e13e3cf286fc945eb1b499", kill_on_drop: false }`
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[INFO] [stderr]     Checking collatz_rust v0.1.0 (/opt/rustwide/workdir)
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[INFO] [stdout] warning: unused variable: `ys`
[INFO] [stdout]  --> benches/my_benchmark.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let ys: Vec<_>   = xs.iter().map(|&n| collatz_length_brian(n)).collect();
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_ys`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ys`
[INFO] [stdout]   --> benches/my_benchmark.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let ys: Vec<_>   = xs.par_iter().map(|&n| collatz_length_brian(n)).collect();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_ys`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 29.18s
[INFO] running `Command { std: "docker" "inspect" "59fefb95fa853bb3bd7eca18dfce2bbcd4039bb752e13e3cf286fc945eb1b499", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59fefb95fa853bb3bd7eca18dfce2bbcd4039bb752e13e3cf286fc945eb1b499", kill_on_drop: false }`
[INFO] [stdout] 59fefb95fa853bb3bd7eca18dfce2bbcd4039bb752e13e3cf286fc945eb1b499
