[INFO] fetching crate competitive-programming-rs 19.0.0...
[INFO] checking competitive-programming-rs-19.0.0 against try#6024cfef3a82f9a7688f07054f1650081bad3af5 for pr-74130
[INFO] extracting crate competitive-programming-rs 19.0.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate competitive-programming-rs 19.0.0 on toolchain 6024cfef3a82f9a7688f07054f1650081bad3af5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "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-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "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" "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" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "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] b6b117e1a4e4020240e29b0fddf81024c4e2fb55dc572c6eb4fbb24914a94848
[INFO] running `Command { std: "docker" "start" "-a" "b6b117e1a4e4020240e29b0fddf81024c4e2fb55dc572c6eb4fbb24914a94848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6b117e1a4e4020240e29b0fddf81024c4e2fb55dc572c6eb4fbb24914a94848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6b117e1a4e4020240e29b0fddf81024c4e2fb55dc572c6eb4fbb24914a94848", kill_on_drop: false }`
[INFO] [stdout] b6b117e1a4e4020240e29b0fddf81024c4e2fb55dc572c6eb4fbb24914a94848
[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" "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" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4c4bd2a078e7b927d2409cebc135f0994a84a832af5111f2ac8b23b11087115
[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" "b4c4bd2a078e7b927d2409cebc135f0994a84a832af5111f2ac8b23b11087115", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking rand v0.4.6
[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 4.81s
[INFO] running `Command { std: "docker" "inspect" "b4c4bd2a078e7b927d2409cebc135f0994a84a832af5111f2ac8b23b11087115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4c4bd2a078e7b927d2409cebc135f0994a84a832af5111f2ac8b23b11087115", kill_on_drop: false }`
[INFO] [stdout] b4c4bd2a078e7b927d2409cebc135f0994a84a832af5111f2ac8b23b11087115