[INFO] fetching crate competitive-programming-rs 30.0.0...
[INFO] checking competitive-programming-rs-30.0.0 against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] extracting crate competitive-programming-rs 30.0.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate competitive-programming-rs 30.0.0 on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate competitive-programming-rs 30.0.0
[INFO] finished tweaking crates.io crate competitive-programming-rs 30.0.0
[INFO] tweaked toml for crates.io crate competitive-programming-rs 30.0.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "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] 5ad6c85853902c46c60a8bf7c3e2fde0d510bb2adeacdd127c7117c74777c116
[INFO] running `Command { std: "docker" "start" "-a" "5ad6c85853902c46c60a8bf7c3e2fde0d510bb2adeacdd127c7117c74777c116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ad6c85853902c46c60a8bf7c3e2fde0d510bb2adeacdd127c7117c74777c116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ad6c85853902c46c60a8bf7c3e2fde0d510bb2adeacdd127c7117c74777c116", kill_on_drop: false }`
[INFO] [stdout] 5ad6c85853902c46c60a8bf7c3e2fde0d510bb2adeacdd127c7117c74777c116
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "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] 3c5f541f788b30b6eb040f46088585559d375de578f2bfa871bb2ed5c304efc9
[INFO] running `Command { std: "docker" "start" "-a" "3c5f541f788b30b6eb040f46088585559d375de578f2bfa871bb2ed5c304efc9", kill_on_drop: false }`
[INFO] [stderr]     Checking competitive-programming-rs v30.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stdout] warning: field is never read: `is_reversed`
[INFO] [stdout]   --> src/graph/min_cost_flow.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         is_reversed: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stdout] warning: field is never read: `is_reversed`
[INFO] [stdout]   --> src/graph/min_cost_flow.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         is_reversed: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.20s
[INFO] running `Command { std: "docker" "inspect" "3c5f541f788b30b6eb040f46088585559d375de578f2bfa871bb2ed5c304efc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c5f541f788b30b6eb040f46088585559d375de578f2bfa871bb2ed5c304efc9", kill_on_drop: false }`
[INFO] [stdout] 3c5f541f788b30b6eb040f46088585559d375de578f2bfa871bb2ed5c304efc9