[INFO] fetching crate roundrobin 0.1.1...
[INFO] checking roundrobin-0.1.1 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate roundrobin 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate roundrobin 0.1.1 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate roundrobin 0.1.1
[INFO] finished tweaking crates.io crate roundrobin 0.1.1
[INFO] tweaked toml for crates.io crate roundrobin 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate roundrobin 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] 23f862a0b3ea5429ffbadf336fa47d7e1e86eab79ae44353f867c1ca828b3a4e
[INFO] running `Command { std: "docker" "start" "-a" "23f862a0b3ea5429ffbadf336fa47d7e1e86eab79ae44353f867c1ca828b3a4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23f862a0b3ea5429ffbadf336fa47d7e1e86eab79ae44353f867c1ca828b3a4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23f862a0b3ea5429ffbadf336fa47d7e1e86eab79ae44353f867c1ca828b3a4e", kill_on_drop: false }`
[INFO] [stdout] 23f862a0b3ea5429ffbadf336fa47d7e1e86eab79ae44353f867c1ca828b3a4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] 735559f089d1fc25d5410932004df80b51f9cc923525bc6e30d5a74a2f62e2a4
[INFO] running `Command { std: "docker" "start" "-a" "735559f089d1fc25d5410932004df80b51f9cc923525bc6e30d5a74a2f62e2a4", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking roundrobin v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `RoundRobinBalancer`, `Server`
[INFO] [stdout]   --> src/rr.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |     use super::{RoundRobinBalancer, Server};
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^  ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/wrr.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "735559f089d1fc25d5410932004df80b51f9cc923525bc6e30d5a74a2f62e2a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "735559f089d1fc25d5410932004df80b51f9cc923525bc6e30d5a74a2f62e2a4", kill_on_drop: false }`
[INFO] [stdout] 735559f089d1fc25d5410932004df80b51f9cc923525bc6e30d5a74a2f62e2a4