[INFO] fetching crate lukkid 0.1.0...
[INFO] checking lukkid-0.1.0 against try#6f12b8fe67b4eed2e838dab803ed9493b9d62c0f for pr-79073
[INFO] extracting crate lukkid 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate lukkid 0.1.0 on toolchain 6f12b8fe67b4eed2e838dab803ed9493b9d62c0f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lukkid 0.1.0
[INFO] finished tweaking crates.io crate lukkid 0.1.0
[INFO] tweaked toml for crates.io crate lukkid 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd32f5c718dfc319288db4f3fdab7f258b82f8b092bf31ca17212528e36206fa
[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" "cd32f5c718dfc319288db4f3fdab7f258b82f8b092bf31ca17212528e36206fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd32f5c718dfc319288db4f3fdab7f258b82f8b092bf31ca17212528e36206fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd32f5c718dfc319288db4f3fdab7f258b82f8b092bf31ca17212528e36206fa", kill_on_drop: false }`
[INFO] [stdout] cd32f5c718dfc319288db4f3fdab7f258b82f8b092bf31ca17212528e36206fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0bf780adc975f828a6a0b135409054f91d7086b389c258f5de47613f4141e21
[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" "d0bf780adc975f828a6a0b135409054f91d7086b389c258f5de47613f4141e21", kill_on_drop: false }`
[INFO] [stderr]     Checking lukkid v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `curr`
[INFO] [stdout]   --> src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     curr: T,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `step`
[INFO] [stdout]   --> src/lib.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     step: T,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `stop`
[INFO] [stdout]   --> src/lib.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     stop: T,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `curr`
[INFO] [stdout]   --> src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     curr: T,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `step`
[INFO] [stdout]   --> src/lib.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     step: T,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `stop`
[INFO] [stdout]   --> src/lib.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     stop: T,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "d0bf780adc975f828a6a0b135409054f91d7086b389c258f5de47613f4141e21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0bf780adc975f828a6a0b135409054f91d7086b389c258f5de47613f4141e21", kill_on_drop: false }`
[INFO] [stdout] d0bf780adc975f828a6a0b135409054f91d7086b389c258f5de47613f4141e21