[INFO] fetching crate competitive-programming-rs 19.0.0...
[INFO] checking competitive-programming-rs-19.0.0 against master#e1beee4992ad4b235fc700bf7af1ee86f894ea53 for pr-74130
[INFO] extracting crate competitive-programming-rs 19.0.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate competitive-programming-rs 19.0.0 on toolchain e1beee4992ad4b235fc700bf7af1ee86f894ea53
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate competitive-programming-rs 19.0.0
[INFO] finished tweaking crates.io crate competitive-programming-rs 19.0.0
[INFO] tweaked toml for crates.io crate competitive-programming-rs 19.0.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d6c37c81a8edb7b203f951a46677c64f5811e5fa69d512dafa640d91b37609a
[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" "1d6c37c81a8edb7b203f951a46677c64f5811e5fa69d512dafa640d91b37609a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d6c37c81a8edb7b203f951a46677c64f5811e5fa69d512dafa640d91b37609a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d6c37c81a8edb7b203f951a46677c64f5811e5fa69d512dafa640d91b37609a", kill_on_drop: false }`
[INFO] [stdout] 1d6c37c81a8edb7b203f951a46677c64f5811e5fa69d512dafa640d91b37609a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0d4ac65b4f1f809befd0a843c1cbbb392e7e7c09d5ed87010165c9a9f66815b
[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" "d0d4ac65b4f1f809befd0a843c1cbbb392e7e7c09d5ed87010165c9a9f66815b", kill_on_drop: false }`
[INFO] [stderr]     Checking competitive-programming-rs v19.0.0 (/opt/rustwide/workdir)
[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] [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 1.26s
[INFO] running `Command { std: "docker" "inspect" "d0d4ac65b4f1f809befd0a843c1cbbb392e7e7c09d5ed87010165c9a9f66815b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0d4ac65b4f1f809befd0a843c1cbbb392e7e7c09d5ed87010165c9a9f66815b", kill_on_drop: false }`
[INFO] [stdout] d0d4ac65b4f1f809befd0a843c1cbbb392e7e7c09d5ed87010165c9a9f66815b